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Artigos de revistas sobre o tema "Grown crystal"

Autor: Grafiati

Publicado: 28 de maio de 2022

Última modificação: 31 de julho de 2025

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1

Yeo, Im Gyu, Tae Woo Lee, Jong Hwi Park, et al. "Effect of the Seed Polarity for High Quality 4H-SiC Crystal Grown on 6H-SiC Seed by PVT Method." Materials Science Forum 679-680 (March 2011): 44–47. http://dx.doi.org/10.4028/www.scientific.net/msf.679-680.44.

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The single crystal ingots by using a sublimation technique were grown on 6H-SiC dual-seed crystals with opposite face polarities and then SiC crystal wafers sliced from the SiC ingot were systematically investigated to find out the polarity dependence of the crystal quality. The growth rate of the SiC crystal grown in this study was about 0.2mm/hr. N-type 2’’ SiC crystals exhibiting the 4H- and 6H-SiC polytype were successfully fabricated on C-face and Si-face, respectively. The incorporation of nitrogen donors in the SiC crystals grown on the C-face seed crystal was exhibited to be higher tha

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2

Sreedevi, R., A. S. I. Joy Sinthiya, S. C. Vella Durai, T. Balu та P. Murugakoothan. "Структура, ріст та оптичні характеристики монокристалів сульфанілату гуанідинію (GSA)". Physics and Chemistry of Solid State 25, № 2 (2024): 278–83. http://dx.doi.org/10.15330/pcss.25.2.278-283.

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Guanidine Sulphanilate (GSA) single crystal was grown by slow evaporation growth method. Single crystal X-ray diffraction studies show that the crystal grows in a centro symmetric monoclinic system and its space group is P21/c. Optical studies were carried out using UV visible spectroscopy and the grown crystal shows the the lower cutoff wavelength of 220 nm. Photoluminescence studies show that GSA crystals have good luminescence properties. Laser damage threshold was found to be 0.24GW/cm2. Nonlinear optical studies show green light emission.

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3

Dinagaran, S., P. Srinivasan, P. Srinivasan, et al. "Growth and Characterization of Anthranilic acid Crystals." JOURNAL OF ADVANCES IN CHEMISTRY 12, no. 11 (2016): 4480–87. http://dx.doi.org/10.24297/jac.v12i11.823.

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ABSTRACTSingle crystals of Anthranilic acid (AA) have been successfully grown and purity of materials has been increased by repeated recrystallization process. Single crystals have been grown by slow evaporation technique. The grown crystal was characterized by Single crystal X-Ray diffraction, Powder XRD, FTIR, UV-Vis, DTA/TGA, Dielectric studies and SHG respectively. The observed results from various characterization show the suitability of NLO application. The second harmonic generation of the grown crystal was checked using Kurtz and Perry technique. Thermal stability and melting point of

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4

Bade, Sujata, Shuaki Hussaini, Yogesh Rasal, and Ravikiran Late. "Effect of Organic Entities on the Performance of Potassium Dihydrogen Phosphate (KDP) Crystals." Journal of Condensed Matter 1, no. 02 (2023): 100–104. http://dx.doi.org/10.61343/jcm.v1i02.32.

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The 0.5mol l-cystine and 2mol oxalic acid doped in potassium dihydrogen phosphate crystals have been developed by slow evaporation method at room temperature. The structural properties of the grown crystal were analyzed by powder X-ray diffraction technique. The functional groups of grown crystals were successfully identified using FTIR spectral analysis. The optical transparency of the grown crystals is examined in the range of 200-900 nm using UV-visible studies. The optical transmittance is found to be 87 % of the grown crystal. The energy band gap (Eg) of the grown crystal was calculated a

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5

Lee, Sang Il, Jung Young Jung, Mi Seon Park, et al. "SiC Single Crystal Growth on Dual Seed with Different Surface Properties." Materials Science Forum 740-742 (January 2013): 11–14. http://dx.doi.org/10.4028/www.scientific.net/msf.740-742.11.

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SiC crystal ingots were grown on 6H-SiC dual-seed crystal with different surface properties by a PVT (Physical Vapor Transport) technique. And then SiC crystal wafers sliced from the SiC ingots were systematically investigated in order to find out the dependence of surface properties for seed on the polytype formation. While n-type SiC crystals exhibiting the 4H polytype were grown on seed crystal having high root-mean-square (rms) value, 6H-SiC crystals were grown on seed having lower rms value. However, 6H polytype was maintained on on-axis and off-axis seeds during the entire growth period.

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6

Kusunoki, Kazuhiko, Kazuhito Kamei, Y. Ueda, et al. "Crystalline Quality Evaluation of 6H-SiC Bulk Crystals Grown from Si-Ti-C Ternary Solution." Materials Science Forum 483-485 (May 2005): 13–16. http://dx.doi.org/10.4028/www.scientific.net/msf.483-485.13.

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The growth of 6H-SiC crystal from Si-Ti-C ternary solution was conducted under the temperature gradient and the crystalline quality evaluations of the grown crystals were carried out. 6H-SiC(0001) on-axis pvt-grown crystal was used as a seed crystal. Micropipes in the seed crystal were terminated during the solution growth and 28mm􀊷28mm self-standing micropipe-free SiC crystals were obtained. The quality of the grown crystals was investigated by SIMS, high-resolution x-ray diffraction and molten KOH etching. The content of residual impurities in the SiC were very low. The X-ray 􀐢-rocking curve

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7

Sudhahar, S., M. Krishna Kumar, A. Silambarasan, R. Muralidharan, and R. Mohan Kumar. "Studies on Structural, Spectral, and Optical Properties of Organic Nonlinear Optical Single Crystal: 2-Amino-4,6-dimethylpyrimidinium p-Hydroxybenzoate." Journal of Materials 2013 (March 28, 2013): 1–7. http://dx.doi.org/10.1155/2013/539312.

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2-Amino-4,6-dimethylpyrimidinium p-hydroxybenzoate (ADPHB), a novel organic material, was synthesized, and crystals were grown by slow evaporation solution growth method. The cell parameters and crystalline perfection of the grown crystal were studied by single crystal and powder X-ray diffraction analyses. The presence of various functional groups of the grown crystal was confirmed using Fourier Transform infrared spectral analysis. UV-Visible spectrum shows that ADPHB crystals have high transmittance in the range 305–900 nm. The refractive index and transient photoluminescence properties of

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8

Seki, Kazuaki, Ryo Tanaka, Toru Ujihara, and Yoshikazu Takeda. "Polytype and Crystal Quality of SiC Crystals Grown on 3C-SiC by Seeded Solution Method." Materials Science Forum 615-617 (March 2009): 27–30. http://dx.doi.org/10.4028/www.scientific.net/msf.615-617.27.

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We investigated the effects of the solution growth process on the polytype and crystal quality of the crystals grown on (111) 3C-SiC seed crystals. In spite of the use of 3C-SiC seed crystals, the polytype of the grown crystal changed from 3C-SiC to 6H-SiC, because the stacking errors easily occur due to the similarity of the (111) face of 3C-SiC and the (0001) face of 6H-SiC. Moreover, the grown 6H-SiC crystal affected the crystal quality of the seed crystal, i.e., high-density stacking faults were induced in the seed crystal after the growth process.

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9

Gobinathan, L., and K. Boopathy. "Photoluminescence, laser damage threshold, optical transmittance, FTIR, mechanical, dielectric, thermal and XRD studies on Bis – Glycine hydrochloride single crystal." JOURNAL OF ADVANCES IN CHEMISTRY 12, no. 11 (2016): 4523–35. http://dx.doi.org/10.24297/jac.v12i11.825.

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Single crystals of Bis – glycine hydrochloride (BGHC) were grown from aqueous solution by means of slow evaporation and slow cooling techniques. Single crystal XRD study reveals that the grown BGHC crystallizes in orthorhombic system with space group P212121 and the obtained unit cell parameters are a = 5.32 Å, b = 8.10 Å and c = 18.01 Å. Powder X – ray diffraction pattern of grown BGHC has been indexed. Functional groups present in the BGHC crystals were identified by FT – IR spectral analysis. The transmission and absorption spectra for the grown BGHC crystal shows that the lower cut off wav

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10

Rajeswari, A., and P. Murugakoothan. "Growth and Characterization of Non-Linear Optical Single Crystal Guanidinium triscadmium Sulphate Octahydrate." Asian Journal of Chemistry 31, no. 3 (2019): 661–68. http://dx.doi.org/10.14233/ajchem.2019.21722.

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Semi-organic single crystals of guanidinium tris cadmium sulphate octahydrate (GuCdS) with nonlinear optical properties were successfully grown by slow solvent evaporation technique. The grown crystals were characterised by powder X -ray diffraction analysis to determine the unit cell parameters. The structure of the compound belongs to triclinic crystal system and space group is found to be P1. The grown crystals were subjected to FTIR spectroscopic analysis to confirm the presence of functional groups present in the compound. UV-vis-NIR spectral study suggested that the grown crystal is tra

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11

KIRUBAVATHI, K., K. SELVARAJU, N. VIJAYAN, and S. KUMARARAMAN. "GROWTH AND CHARACTERIZATION OF GLYCINE HYDROBROMIDE SINGLE CRYSTAL FOR NONLINEAR OPTICAL APPLICATIONS." Modern Physics Letters B 22, no. 21 (2008): 2035–42. http://dx.doi.org/10.1142/s0217984908016716.

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Single crystals of a new semi-organic nonlinear optical material glycine hydrobromide were grown from solution by slow evaporation at room temperature. Good optical quality single crystals with dimensions 17×8×5 mm3 were obtained. The grown crystal had been confirmed by single-crystal X-ray diffraction and the vibrational frequencies of various functional groups in the crystals had been derived from Fourier transform infrared spectrum. The optical quality of the grown crystals was analyzed by the Ultraviolet visible spectrum method. The mechanical behavior of the grown crystal was evaluated by

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12

Vaidya, Rajiv, Mehul Dave, and Kaushik R. Patel. "Electrical Properties of WSe2-X Single Crystals Grown By Direct Vapour Transport Technique." YMER Digital 21, no. 02 (2022): 440–47. http://dx.doi.org/10.37896/ymer21.02/44.

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The single crystals of WSe2-x were grown by direct vapour transport technique. The grown crystals possess hexagonal crystal structure. The resistivities of the as grown crystals were measured using van der Pauw method. The Hall parameters of the grown crystals were determined at room temperature from Hall effect measurements. Electrical resistivity measurements were performed on this crystal in the temperature range 303–423 K. The crystals werefound to exhibit semiconducting nature in this range. The activation energy and anisotropy measurements were carried out for this crystal. The value of

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13

K., Lilly Mary Eucharista, Krishnan C., and Selvarajan P. "STRUCTURAL, MECHANICAL, OPTICAL, THERMAL, ELECTRICAL STUDIES OF A NONLINEAR OPTICAL SINGLE CRYSTAL: GAMMA GLYCINE USING LITHIUM BROMIDE AS AN ADDITIVE." International Journal of Advanced Trends in Engineering and Technology 2, no. 2 (2017): 60–70. https://doi.org/10.5281/zenodo.846411.

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Single crystals of gamma glycine, an organic nonlinear optical material were grown by slow evaporation method from aqueous solutions of lithium bromide. Good optical quality single crystals were grown within a period of 3 weeks. The grown crystals were colorless and transparent. The solubility of the grown crystals has been estimated for various temperatures. The XRD study reveals that the grown crystal crystallizes in the hexagonal crystal system and corresponding lattice parameters were determined.The reflection planes of the sample were confirmed by the powder X-ray diffraction study and di

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14

Deepa, B., and P. Philominathan. "Optical, mechanical and thermal behaviors of Nitrilotriacetic acid single crystal." International Journal of Modern Physics B 31, no. 28 (2017): 1750200. http://dx.doi.org/10.1142/s0217979217502009.

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An organic nonlinear single crystal of Nitrilotriacetic acid (NTAA) was grown for the first time by employing a simple slow evaporation technique. Single crystal X-ray diffraction (XRD) analysis reveals that the grown crystal belongs to the monoclinic system with noncentrosymmetric space group [Formula: see text]. Fourier transform infrared (FTIR) spectral study ascertains the presence of functional groups in NTAA. The molecular structure of the grown crystal was confirmed by Nuclear Magnetic Resonance (NMR) spectral analysis. The optical parameters such as transmittance, absorption coefficien

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15

Masilamani, V., J. Shanthi, and V. Sheelarani. "Growth and Analysis of NSH and KMNSH Crystals by Slow Evaporation Technique." ISRN Condensed Matter Physics 2014 (March 24, 2014): 1–5. http://dx.doi.org/10.1155/2014/678567.

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Nickel sulphate hexahydrate (NSH) and potassium magnesium nickel sulphate hexahydrate (KMNSH) single crystals were grown by slow evaporation method. The grown NSH crystal was found to crystallize in tetragonal system with space group P41 21 2 and KMNSH in monoclinic system with space group P121/c. The optical band gap energies of the grown crystals using UV-Vis spectral results for the doped and undoped NSH crystals were calculated. The presence of various functional groups in the crystal was identified by FTIR analysis. The thermal behaviour of the grown crystal has been studied by TGA/DTA an

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16

KIRUBAVATHI, K., K. SELVARAJU, and S. KUMARARAMAN. "STUDIES ON GROWTH AND CHARACTERIZATION OF BIS THIOUREA LEAD CHLORIDE: A NOVEL NONLINEAR OPTICAL CRYSTAL." Journal of Nonlinear Optical Physics & Materials 18, no. 01 (2009): 153–59. http://dx.doi.org/10.1142/s0218863509004531.

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Single crystals of the metal-organic nonlinear optical material bis thiourea lead chloride were grown from solution growth technique for the first time. The grown crystals were characterized by single crystal X-ray diffraction analysis to confirm the crystal structure. The presence of various functional groups and the coordination of metal ions to thiourea were confirmed by Fourier transform infrared analysis. UV-Vis. spectrum was recorded to study the optical transparency of the grown crystals. The second order nonlinear optical property of the grown crystal was examined by Kurtz powder techn

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17

Peramaiyan, G., P. Pandi, B. M. Sornamurthy, and R. Mohan Kumar. "Synthesis, Growth and Characterization of Organic Nonlinear Optical L-Asparagine L-Tartrate Single Crystals." Advanced Materials Research 584 (October 2012): 13–17. http://dx.doi.org/10.4028/www.scientific.net/amr.584.13.

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L-asparagine L-tartrate (LAT), an organic compound has been synthesized from aqueous solution and bulk single crystal has been grown by slow evaporation technique. Powder X-ray diffraction studies confirmed the monoclinic structure of the grown LAT crystal. The presence of functional groups of the grown crystal was identified by FTIR studies. Linear optical property of the grown crystal was studied by UV-Vis spectral analysis. Microhardness studies reveal that the crystal possesses relatively higher hardness compared to other organic nonlinear optical crystals. Dielectric response of the L-asp

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18

Arthi, A. P., M. Sumithra Devi, and K. Thamizharasan. "Structural, Microhardness, Photoconductivity, and Dielectric Properties of Tris(thiourea) Cadmium Sulphate Single Crystals." Journal of Solid State Physics 2014 (November 20, 2014): 1–5. http://dx.doi.org/10.1155/2014/153272.

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Semiorganic nonlinear optical tris(thiourea) cadmium sulphate (TTCS) single crystals were grown by slow evaporation method. The crystal system, cell parameter of the grown crystal, was identified by powder X-ray diffraction study. The self-focusing Z-scan technique has been employed to observe the third-order nonlinear optical property of the grown crystal. The mechanical property of the grown crystal was examined by using Vicker’s microhardness test. Chemical etching studies were made on the TTCS crystal using water as an etchant. The dark current and photocurrent properties of the crystal we

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19

Danno, Katsunori, Satoshi Yamaguchi, Hiroyuki Kimoto, Kazuaki Sato, and Takeshi Bessho. "Trials of Solution Growth of Dislocation-Free 4H-SiC Bulk Crystals." Materials Science Forum 858 (May 2016): 19–22. http://dx.doi.org/10.4028/www.scientific.net/msf.858.19.

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Solution growth of high-quality 4H-SiC bulk crystals has been performed by using Si-Cr based melt at 2000°C. Through enlargement of crystal diameter which is controlled by meniscus height during growth, dislocation free area has been successfully obtained on the periphery of the crystal. However, the threading dislocations in the seed crystal have penetrated into the grown crystal and have been located around the center of the crystal. To reduce dislocation density in the grown crystals, we have used threading-dislocation-free seedcrystals prepared by solution growth on (1-100). The solution g

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20

Venkatesan, A., S. Arulmani, E. Chinnasamy, S. Senthil, and M. E. Raja Saravanan. "Growth, Experimental Studies and DFT Calculations on Gallic acid 5-Nitrouracilate Single Crystals for Non-linear Optical Applications." Asian Journal of Chemistry 33, no. 5 (2021): 1085–89. http://dx.doi.org/10.14233/ajchem.2021.23130.

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The growth and characterization of gallic acid 5-nitrouracilate (GA5NU) single crystals were grown using slow evaporation solution growth technique at room temperature. Single crystal XRD analysis revealed that the grown crystal belongs to monoclinic crystal system. HOMO-LUMO and molecular electrostatic potential (MEP) has been visualized and analyzed. The presence of various functional groups present in the host material was examined using FTIR spectra. Mechanical stability of the grown crystal is validated using Vickers microhardness study and the grown crystal belongs to soft material categ

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21

Malliga, P., and A. Joseph Arul Pragasam. "Growth and Characterization of Pure and Thiourea Doped L-Alanine Single Crystals for Crystals for NLO Devices." Advanced Materials Research 1086 (February 2015): 79–84. http://dx.doi.org/10.4028/www.scientific.net/amr.1086.79.

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Single crystals of pure and thiourea substituted L-alanine single crystals were grown successfully by the solution method with slow evaporation technique at room temperature. The effect of dopant on crystal properties has been studied. The solubility of the grown samples was found at various temperatures. Structural characterization of the grown crystals was determined by the single crystal X-ray diffraction (XRD). EDAX studies indicate the presence of thiourea in the doped L-alanine crystals. The functional groups were identified by FTIR spectroscopy. The UV-Vis- NIR spectral studies were car

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22

Amudha, M., R. Rajkumar, V. Thayanithi, and P. Praveen Kumar. "Growth and Characterization of Benzimidazolium Salicylate: NLO Property from a Centrosymmetric Crystal." Advances in Optical Technologies 2015 (October 29, 2015): 1–9. http://dx.doi.org/10.1155/2015/206325.

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A new organic charge transfer molecular complex salt of benzimidazolium salicylate (BSL) single crystals was grown by the slow evaporation solution growth technique using methanol as a solvent at room temperature. The grown crystals were characterised by single crystal X-ray diffraction (XRD) which confirms that the crystal belongs to monoclinic system with the centrosymmetric space group P21/c. The crystalline perfection of the grown crystal was analyzed by high resolution X-ray diffraction (HRXRD). The presence of various functional groups was identified by FTIR spectrum. UV-Vis spectral stu

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23

Rajesh, K., A. Mani, V. Thayanithi, and P. Praveen Kumar. "Optical, Thermal, and Mechanical Properties of L-Serine Phosphate, a Semiorganic Enhanced NLO Single Crystal." International Journal of Optics 2016 (2016): 1–5. http://dx.doi.org/10.1155/2016/9070714.

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Single crystals of L-serine phosphate (LSP) were grown by slow evaporation technique. The optical studies reveal the transparency of the crystal in the entire visible region. Grown crystal was subjected to single crystal XRD diffraction technique. Thermal studies of LSP confirm the thermal stability of the crystal and it is stable up to 210°C. The functional groups and optical behaviour of the crystal were identified from FT-IR and UV-Vis analysis. The crystals were also characterized by microhardness and photoconductivity to determine the mechanical strength and the optical conductivity. Lase

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24

Bamba, Noriko, Kentaro Kato, Toshinori Taishi, Takayuki Hayashi, Keigo Hoshikawa, and Tatsuo Fukami. "The Characteristic of the La₃Ga₅SiO₁₄ Single Crystal Grown by Vertical Bridgman Method in Ar Atmosphere." Materials Science Forum 510-511 (March 2006): 842–45. http://dx.doi.org/10.4028/www.scientific.net/msf.510-511.842.

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Langasite (La3Ga5SiO14: denoted by LGS) single crystal is one of the lead free piezoelectric materials with high piezoelectricity that is maintained up to its melting point (1470°C). Although LGS single crystals have usually been grown by Czochralski (CZ) method in oxygen contained atmosphere to prevent evaporation of Ga, they were grown by the vertical Bridgman (VB) method in Ar atmosphere without oxygen, and their properties were evaluated in this work. Transparent and colorless LGS single crystals were successfully obtained without Ga evaporation by the VB method in Ar atmosphere, and their

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25

Devi, S. Reena, S. Suresh, S. Kalaiyarasi, M. Nizammohideen, and R. Mohan Kumar. "Synthesis, growth, structural, thermal and third order nonlinear optical properties of novel organic single crystal: 4-methylpyridinium 3-nitrophthalate." Materials Science-Poland 36, no. 4 (2018): 597–608. http://dx.doi.org/10.2478/msp-2018-0082.

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AbstractA novel 4-methylpyridinium 3-nitrophthalate (4MP3NP) was synthesized and the crystals were grown by using slow evaporation method. The structural data of the grown crystal was collected by single crystal X-ray diffraction. It revealed that the 4MP3NP crystal belongs to triclinic crystal system with a space group P1. Structure of the synthesized compound was established using SHELXL 97 program package. The crystalline nature and composition of the grown crystal was established using high resolution X-ray diffraction and FT-IR analyses. UV-Vis transmittance and photoluminescence studies

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26

Manimekalai, R., and S. Chidambaram. "Growth and Characterization of Adipic Acid Doped Potassium Hydrogen Phthalate: A Nonlinear Optical Single Crystal." Asian Journal of Chemistry 32, no. 1 (2019): 79–83. http://dx.doi.org/10.14233/ajchem.2020.22273.

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Adipic acid doped potassium hydrogen phthalate (AAKHP) and pure potassium hydrogen phthalate single crystals were grown by slow evaporation method. Single crystal X-ray diffraction analysis was carried out to determine the lattice parameters in a = 6.47 Å, b = 9.59 Å, c = 13.25 Å and space group of Pca21. This confirms the grown AAKHP belongs to the orthorhombic system. Various diffracting planes of the grown crystal were indexed using powder X-ray diffraction study. Fourier-transform infrared studies confirm the presence of various functional groups in the grown crystal. The transmittance spe

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27

Karunagaran, N., and P. Ramasamy. "Growth of Ethyl-Para-Hydroxybenzoate Single Crystal and its Characterization." Advanced Materials Research 584 (October 2012): 121–25. http://dx.doi.org/10.4028/www.scientific.net/amr.584.121.

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Ethyl-para-hydroxybenzoate (EHB) single crystals have been grown by slow evaporation solution technique (SEST) using methanol as a solvent. The grown crystal was subjected to single crystal X-ray diffraction analysis, confirming that the crystal belongs to monoclinic structure. The grown crystal was characterized by powder X-ray diffraction analysis. The functional groups present in the EHB crystal have been identified using FTIR spectrum analysis. The laser damage threshold of EHB crystal was measured. The mechanical strength of the grown EHB crystal was measured using Vickers microhardness,

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Aarthi, J., S. Gowri, and M. Sornambal. "Effect of Dicarboxylic Acid Dopant on ADP Crystal by Slow Evaporation Method." Mechanics and Mechanical Engineering 22, no. 4 (2020): 1261–72. http://dx.doi.org/10.2478/mme-2018-0097.

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AbstractInfluence of dicarboxylic acid dopant on growth and characterization of ADP crystal were grown by slow evaporation technique at room temperature. The transparent (ADFU) crystals are yield after a period of 15 days. The X-ray diffraction study reveals that ADFU crystal belongs to tetragonal system. The vibrational modes of grown crystal were confirmed by FTIR spectral analysis. In UV-Vis spectral analysis the absorbance is low than pure ADP which reveals that NLO active of grown crystal is more. The emission spectrum of grown crystal was studied using fluorescence spectral analysis. The

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Morito, Haruhiko, Hisanori Yamane, Rie Y. Umetsu, and Kozo Fujiwara. "Seeded Growth of Type-II Na24Si136 Clathrate Single Crystals." Crystals 11, no. 7 (2021): 808. http://dx.doi.org/10.3390/cryst11070808.

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Type-II Na24Si136 clathrate octahedral single crystals surrounded by {111} facets were grown by evaporating Na from a molten mixture of Na4Si4 and Na9Sn4 at 823 K for 12 h. One of the obtained single crystals was used as a seed for the following single crystal growth of the type-II clathrate using the same method. The single crystal grown on the seed maintained the octahedral shape. The weight of the crystal grown with the seed was increased from 0.6 to 30.4 mg by repeating the seeded growth and was proportional to the surface area of the seed crystal.

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Lee, Doe Hyung, Hee Tae Lee, Byung Joong Bae, et al. "Effect of TaC-Coated Crucible on SiC Single Crystal Growth." Materials Science Forum 778-780 (February 2014): 26–30. http://dx.doi.org/10.4028/www.scientific.net/msf.778-780.26.

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The present research was focused to extensively investigate the effect of TaC-coated crucible on the SiC crystal growth and then compare the difference of various properties between SiC crystals grown in conventional graphite crucible and TaC-coated crucible. The bulk growth was conducted around 2200°C of the growth temperature and 40 mbar of an argon atmosphere for the growth pressure. The better crystalline quality was obtained from the crystal grown in TaC-coated crucible. The SiC crystal grown in the TaC-coated crucible exhibited superior characteristics than SiC crystal grown in the conve

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SIVAKUMAR, P. K., M. KRISHNA KUMAR, R. MOHAN KUMAR, and R. KANAGADURAI. "STUDIES ON THE GROWTH, SPECTRAL, OPTICAL AND THERMAL PROPERTIES OF 4-NITROANILINE PICRATE SINGLE CRYSTALS." Modern Physics Letters B 27, no. 32 (2013): 1350235. http://dx.doi.org/10.1142/s0217984913502357.

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In this paper, an organic 4-nitroaniline picrate (4NP) single crystal was grown by solution growth method. Single crystal X-ray diffraction study revealed that grown crystal belongs to orthorhombic system with Pbcn space group. The solid state constants such as plasma energy, Penn gap, Fermi energy and polarizability of 4NP crystal were determined theoretically. The functional groups of the grown crystals were confirmed qualitatively from FTIR spectral analysis. The thermal decomposition and melting point of the crystal were determined from thermogravimetric analysis. The optical absorption an

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DHAVAMURTHY, M., G. PERAMAIYAN, S. SYED SURESH BABU, and R. MOHAN. "SYNTHESIS, GROWTH AND CHARACTERIZATION STUDIES OF p-HYDROXYBENZOIC ACID ADDITION WITH THE GUANIDINIUM CARBONATE SINGLE-CRYSTALS." Journal of Molecular and Engineering Materials 02, no. 03n04 (2014): 1450006. http://dx.doi.org/10.1142/s2251237314500063.

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An organic nonlinear optical (NLO) crystal of Guanidinium carbonate (GUCT) was synthesized by the slow evaporation solution growth method using water as solvent. The GUCT crystalized in the tetragonal crystal system with non-centrosymmetric space group P43212, which has been confirmed by single-crystal X-ray diffraction. The crystalline perfection of the grown crystals has been analyzed by high-resolution X-ray diffraction (HRXRD) rocking curve measurements. The UV-Vis-NIR spectrum studies have been carried out to identify the optical transmittance, lower cut off wavelength and optical band ga

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Janarthanan, S., Y. C. Rajan, R. Sugaraj Samuel, and S. Pandi. "Crystal Growth, Spectral, Thermal and Optical Properties of Phthalic Anhydride (PA) Single Crystal." Advanced Materials Research 584 (October 2012): 136–40. http://dx.doi.org/10.4028/www.scientific.net/amr.584.136.

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ABSTRACT Organic single crystal of Phthalic Anhydride (PA) was successfully grown by slow evaporation method. The structure of the grown crystal was confirmed by X-ray diffraction analysis. FT-IR, and FT-Raman spectral analysis of the crystalline samples reveal that the crystalline sample consists of all functional groups. The placement of protons was identified from H1-NMR spectral analysis. UV-Visible and photoluminescence spectral analyses were carried out for the grown crystals. The thermal behavior was studied with TGA-DTA analyses. The existence of second harmonic generation (SHG) signal

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Deakin, Michelle, Jeanne Paquette, and Don Baker. "A recipe for laboratory-grown crystals." McGill Science Undergraduate Research Journal 2, no. 1 (2007): 39–42. http://dx.doi.org/10.26443/msurj.v2i1.141.

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    Clinopyroxenes are among the first minerals to crystallize out of a ferromagnesian silicate magma. They commonly exhibit “sectorzoning”, a phenomenon whereby the crystal incorporates elements in different proportions on non-equivalent crystal faces. By growing clinopyroxene crystals in the laboratory, it is possible to investigate controls on compositional variation, which provides insight on magmatic processes. The goal of this research was to develop an experimental method for growing synthetic clinopyroxene (a silicate mineral) in a carbonate melt rather than in

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Arivanandhan, M., G. Rajesh, A. Tanaka, et al. "Bulk Growth of InGaSb Alloy Semiconductor under Terrestrial Conditions: A Preliminary Study for Microgravity Experiments at ISS." Defect and Diffusion Forum 323-325 (April 2012): 539–44. http://dx.doi.org/10.4028/www.scientific.net/ddf.323-325.539.

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As a preliminary experiment for the growth of InGaSb alloy crystals under microgravity at International Space Station (ISS), bulk crystal was grown under terrestrial condition using the same gradient heating furnace (GHF). Czochralski grown GaSb <111>B single crystal was used as a seed and feed crystals for the growth of InGaSb bulk crystals. During the growth, heat pulses were intentionally introduced periodically to create the growth striations. From the striations, the growth rate of the grown crystal was estimated. The results show that the growth rate was gradually increased from th

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Fisher, John G., Su-Hyeon Sim, Trung Thành Ðoàn, Eugenie Uwiragiye, Jungwi Mok, and Junseong Lee. "Comparison of (K0.5Na0.5)NbO3 Single Crystals Grown by Seed-Free and Seeded Solid-State Single Crystal Growth." Materials 16, no. 10 (2023): 3638. http://dx.doi.org/10.3390/ma16103638.

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(K0.5Na0.5)NbO3-based piezoelectric ceramics are of interest as a lead-free replacement for Pb(Zr,Ti)O3. In recent years, single crystals of (K0.5Na0.5)NbO3 with improved properties have been grown by the seed-free solid-state crystal growth method, in which the base composition is doped with a specific amount of donor dopant, inducing a few grains to grow abnormally large and form single crystals. Our laboratory experienced difficulty obtaining repeatable single crystal growth using this method. To try and overcome this problem, single crystals of 0.985(K0.5Na0.5)NbO3-0.015Ba1.05Nb0.77O3 and

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Khan, Ajmal, Derrick T. Carpenter, Adam M. Scotch, Helen M. Chan, and Martin P. Harmer. "Electron backscatter diffraction analysis of Pb(Mg1/3Nb2/3)O3–35mol%PbTiO3 single crystals grown by seeded polycrystal conversion." Journal of Materials Research 16, no. 3 (2001): 694–700. http://dx.doi.org/10.1557/jmr.2001.0104.

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Electron backscatter diffraction (EBSD) has been applied to characterize Pb(Mg1/3Nb2/3)O3–35 mol%PbTiO3 single crystals grown by the seeded polycrystal conversion method. Macroscopically triangular crystal growth fronts were shown to each be associated with discrete crystals that originated from slightly misoriented segments of an initially cracked single-crystal seed plate. Various types of crystal imperfections, including voids, second-phase regions, and polycrystalline matrix grains trapped within the grown region, were readily identified and distinguished from one another using EBSD. Furth

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Subbotin, Kirill A., Yana S. Didenko, Anatolii I. Titov, et al. "Influence of Ultrahigh Dilution Treatment of the Charge on the Growth and Spectroscopic Properties of Nd:MgMoO4 Potential Laser Crystal." Crystals 14, no. 1 (2024): 100. http://dx.doi.org/10.3390/cryst14010100.

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The influence of the charge treatment by ultrahigh dilution (UHD) technology on oxide single crystals grown by the Czochralski technique was studied for monoclinic MgMoO4 crystals doped by 1 at. % of Nd3+ ions. The series of 10 Nd:MgMoO4 crystals was grown from the charges that were subjected to UHD treatment, as well as from the charges treated with two types of control or with no special treatment at all. The grown crystals were studied by X-ray powder diffraction analysis, inductively coupled plasma atomic emission spectroscopy, mass-spectrometry, optical absorption, emission spectroscopy a

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Mani, A., K. Rajesh, and P. Praveen Kumar. "Crystal Growth, Optical, Dielectric, Thermal, Mechanical, Laser Damage Threshold and Second Harmonic Generation Characterization of Bis 2,5-Dimethylanilinium Sulfate Single Crystal." Advanced Science Letters 24, no. 8 (2018): 5785–89. http://dx.doi.org/10.1166/asl.2018.12196.

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Single crystals of bis 2,5-dimethylanilinium sulfate (bis 2,5-DAS) were grown by slow evaporation solution growth technique at room temperature. The crystalline nature of the grown crystal was confirmed by the single crystal X-ray data. Bis 2,5-DAS crystal was found to crystallize in monoclinic system with non-centrosymmetric space group Cc. The various functional groups presented in the crystal were confirmed by FT-IR spectroscopic studies. Optical transmittance of the grown crystal was studied by UV–Vis–NIR spectroscopy. The dielectric loss and dielectric constant measurement as a frequency

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Riscob, B., Indranil Bhaumik, S. Ganesamoorthy, et al. "Crystal growth of Ru-doped congruent LiNbO3and investigation of crystalline perfection and optical properties." Journal of Applied Crystallography 48, no. 6 (2015): 1753–60. http://dx.doi.org/10.1107/s1600576715018464.

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Single crystals of undoped and Ru-doped congruent LiNbO3(LN) were successfully grown by the Czochralski method. The axial and radial gradient of the radio frequency furnace was controlled in order to obtain crack-free single crystals. Wafers were cut from the grown Ru-doped single crystal at different axial positions along the growth direction and subjected to various characterization analyses. Good optical homogeneity and low residual strain in the grown crystal is confirmed by the conoscopy patterns. Further, it is confirmed that Ru doping does not influence the optical sign of the crystal.

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B.Ravindran, T.Manimaran, Bhuvaneswari S., N.Chandrasekaran, and S.Kamali. "Effect of L-Threonine Doping on Optical, Structural and Thermal properties of KBr Single Crystals." RESEARCH REVIEW International Journal of Multidisciplinary 4, no. 3 (2019): 205–8. https://doi.org/10.5281/zenodo.2596605.

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A new NLO crystal L-Threonine doped Potassium Bromide (LTPB) crystal is reported by synthesis and growth along with the comparison of pure L-Threonine. Grown crystals of LTPB crystals are characterized with UV-Vis-NIR, FTIR, Powder XRD, TG-DSC, and SHG. Clear crystals of very good transparency were harvested by slow evaporation technique at room temperature. Inclusion is confirmed with the change in the structure of materials using Xrd pattern. FTIR spectrum exposes the available functional groups in the grown crystal to confirm the new arrival. TG-DSC spectra show the thermal properties of LT

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P., Geneva Sequirea Roche, Lesly Fathima A., and Selvarajan P. "CRYSTAL NUCLEATION, CRYSTAL GROWTH, SPECTRAL AND SHG STUDIES OF POTASSIUM IODATE CRYSTAL." International Journal of Advanced Trends in Engineering and Technology 3, no. 1 (2018): 70–78. https://doi.org/10.5281/zenodo.1203661.

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Solution growth was adopted to grow crystals of potassium iodate and here AR grade chemicals of potassium chloride and iodic acid were used in the crystal growth experiment. The grown crystals were observed to be transparent and slightly hygroscopic. The solubility study has been carried out in the temperature range 30<sup>o </sup>C-60<sup>o </sup>C in water and it is found that the sample has positive temperature coefficient of solubility. The critical nucleation parameters were evaluated by nucleation kinetic studies. The lattice constants of the grown crystal of potassium iodate were found

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Lee, Hee Jun, Hee Tae Lee, Hee Won Shin, et al. "Effect of Porous Graphite for High Quality SiC Crystal Growth by PVT Method." Materials Science Forum 821-823 (June 2015): 43–46. http://dx.doi.org/10.4028/www.scientific.net/msf.821-823.43.

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The effect of the porous graphite plate above the source material on properties of silicon carbide (SiC) crystals grown by Physical Vapor Transport method has been investigated. The porous graphite plate was inserted on source powder to produce a more C-rich for the polytype stability of 4H-SiC crystal and a uniform radial temperature gradient. The dendrite structure obtained from SiC source powder in the crucible with porous graphite plate was more densely formed than that in the conventional crucible. The crystal quality of 4H-SiC single crystals grown in porous graphite inserted crucible wa

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Koide, Seiji, and Kenichi Kakimoto. "Crystallographic Orientation of (Li,Na,K)NbO₃ Lead-Free Piezoelectric Crystal." Key Engineering Materials 566 (July 2013): 68–71. http://dx.doi.org/10.4028/www.scientific.net/kem.566.68.

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Li,Na,K)NbO3 (LNKN) crystals were grown by an infrared convergence-type floating zone (FZ) method using SrTiO3 seed crystals to control the crystallographic orientation. The crystals were grown along the [10 direction of SrTiO3 seed crystal. It was a critical condition for the crystal growth that the descending speed of an upper shaft in the FZ furnace was faster than that of the lower shaft. The grown crystal sizes were about 10 mm in length and 5 mm in diameter. A relation between the Li content and Tc was investigated, and the result was compared with the case of polycrystalline ceramic sam

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M.Joice, Malini, M.K.Sangeetha, R.Kunjitham, M.Mariappan, B.Ravindran, and S.Kamali. "Effect of Cadmium sulphate on the Growth and Characterization of L Valine Crystal." RESEARCH REVIEW International Journal of Multidisciplinary 03, no. 07 (2018): 319–24. https://doi.org/10.5281/zenodo.1318270.

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By slow evaporation of a new semi organic nonlinear optical crystal and by synthesizing L-Valine cadmium sulphate good optical quality single crystals were grown. By powder X-ray diffraction studies, the growth conditions of the crystals are studied and the crystalline natures of grown crystals are confirmed. By using powdered XRD, FTIR, UV-Vis-NIR and DSC –TGA, the grown crystals was characterized. The high crystallinity of the grown crystal is shown by the sharp peaks from powdered XRD spectrum. By using FTIR spectroscopic technique the presence of various functional groups were confir

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Anbulakshmi, C., P. Selvarajan, and S. Selvaraj. "Growth, XRD, Mechanical, Optical and SHG Studies of L-Lysine L-Tartaric Acid Crystals." Asian Journal of Engineering and Applied Technology 8, no. 2 (2019): 57–62. http://dx.doi.org/10.51983/ajeat-2019.8.2.1137.

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Single crystals of L-lysine L-tartaric acid (LLLT) were grown by solution method using double distilled water as the solvent. The grown crystals LLLT were subjected to characterization studies like XRD studies, mechanical studies, optical studies and SHG studies. From XRD studies, it is ascertained that LLLT crystal crystallizes in monoclinic structure. The grown crystal has high transmittance in the visible region and it has high optical band gap. The mechanical parameters like hardness, work hardening coefficient, yield strength, stiffness constant, brittleness index, corrected hardness and

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Mohammed, Azeezaa Varsha, and Suresh Sagadevan. "Studies on the growth and characterization of L-cysteine hydrogen fluoride single crystal." Materials Science-Poland 37, no. 3 (2019): 304–9. http://dx.doi.org/10.2478/msp-2019-0046.

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AbstractL-cysteine hydrogen fluoride (LCHF) single crystals were grown from aqueous solution. Single crystal X-ray diffraction, FT-IR, UV-Vis-NIR, and TG-DTA were used to test the grown crystals. The specimen dielectric and mechanical behaviors were also studied. Powder X-ray diffraction of the grown crystal was recorded and indexed. The optical properties of the LCHF crystal were determined using UV-Vis spectroscopy. It was found that the optical band gap of LCHF was 4.8 eV. The crystal functional groups were identified using FT-IR. Second harmonic generation (SHG) efficiency of the LCHF was

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Lyasnikova, M. S., A. A. Kulishov, G. A. Yurasik, V. A. Postnikov, A. I. Karakash, and A. E. Voloshin. "SOLUTION-GROWN TRANS-STILBENE SINGLE CRYSTAL AND ITS SCINTILLATION PROPERTIES." Кристаллография 68, no. 4 (2023): 628–36. http://dx.doi.org/10.31857/s0023476123600271.

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Trans-stilbene single crystals are of great interest for researchers as scintillators characterized by a high specific light yield. Bulk trans-stilbene single crystals have been grown from an anisole solution. The transmission and photoluminescence spectra have been recorded, and the single-crystal photoluminescence quenching kinetics has been investigated. The scintillation properties of an element (17 × 12 × 5 mm in size) prepared from a grown trans-stilbene crystal, irradiated by γ radiation and X rays, have also been investigated. It is shown that the specific light yield of the obtained c

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Uwiragiye, Eugenie, Thuy Linh Pham, Jong-Sook Lee, Byoung-Wan Lee, Jae-Hyeon Ko, and John G. Fisher. "0.98(K0.5Na0.5)NbO3–0.02(Bi0.5Na0.5)(Zr0.85Sn0.15)O3 Single Crystals Grown by the Seed-Free Solid-State Crystal Growth Method and Their Characterization." Ceramics 7, no. 3 (2024): 840–57. http://dx.doi.org/10.3390/ceramics7030055.

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(K0.5Na0.5)NbO3-based single crystals are of interest as high-performance lead-free piezoelectric materials, but conventional crystal growth methods have some disadvantages such as the requirement for expensive Pt crucibles and difficulty in controlling the composition of the crystals. Recently, (K0.5Na0.5)NbO3-based single crystals have been grown by the seed-free solid-state crystal growth method, which can avoid these problems. In the present work, 0.98(K0.5Na0.5)NbO3–0.02(Bi0.5Na0.5)(Zr0.85Sn0.15)O3 single crystals were grown by the seed-free solid-state crystal growth method. Sintering ai

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Pandurangan, Koteeswari, and Sagadevan Suresh. "Synthesis, Growth, and Characterization of Bisglycine Hydrobromide Single Crystal." Journal of Materials 2014 (June 29, 2014): 1–7. http://dx.doi.org/10.1155/2014/362678.

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Single crystals of BGHB were grown by slow evaporation technique. The unit cell dimensions and space group of the grown crystals were confirmed by single crystal X-ray diffraction. The modes of vibration of the molecules and the presence of functional groups were identified using FTIR technique. The microhardness study shows that the Vickers hardness number of the crystal increases with the increase in applied load. The optical properties of the crystals were determined using UV-Visible spectroscopy. The thermal properties of the grown crystal were also determined. The refractive index was det

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