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Journal articles on the topic '1400-1500'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

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1

Joost-Gaugier, Christiane L., Ludwig H. Heydenreich, Paul Davies, and Wolfgang Lotz. "Architecture in Italy, 1400-1500." Sixteenth Century Journal 27, no. 3 (1996): 963. http://dx.doi.org/10.2307/2544126.

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2

Meredith, Peter, and William Tydeman. "English Medieval Theatre 1400-1500." Modern Language Review 84, no. 4 (1989): 918. http://dx.doi.org/10.2307/3731174.

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3

Fernández, Enrique. "Castilian Writers, 1400-1500 (review)." La corónica: A Journal of Medieval Hispanic Languages, Literatures, and Cultures 32, no. 2 (2004): 232–35. http://dx.doi.org/10.1353/cor.2004.0006.

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4

Jacobs, Fredrika H. "Italian Art 1400–1500. Sources and documents." History of European Ideas 18, no. 3 (1994): 440–41. http://dx.doi.org/10.1016/0191-6599(94)90521-5.

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5

Nishimura, Toshiyuki, Naoto Hirosaki, Yoshinobu Yamamoto, Yorinobu Takigawa, and Jian-Wu Cao. "Tensile Creep Behavior in Lutetia-doped Silicon Nitride Ceramics." Journal of Materials Research 20, no. 8 (2005): 2213–17. http://dx.doi.org/10.1557/jmr.2005.0278.

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We studied tensile creep behavior in two silicon nitride ceramics, i.e., 4.8 mol% Lu2O3 (SN48) and 1.2 mol% Lu2O3 (SN12), at 1400–1500 °C under applied stress of 137–300 MPa. Time to failure of SN48 increased with decreasing applied stress and minimum strain rate. The stress–rupture parameter was 10.7 at 1400 °C and 11.4 at 1500 °C. Pore formation was confirmed in a creep-tested specimen of SN48 by transmission electron microscopy. These results suggest that SN48 was fractured by creep rupture. The minimum strain rate of SN12 was almost below the measurement system limitation at temperatures b

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6

Pint, Bruce A. "Performance of FeCrAl for accident-tolerant fuel cladding in high-temperature steam." Corrosion Reviews 35, no. 3 (2017): 167–75. http://dx.doi.org/10.1515/corrrev-2016-0067.

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AbstractThe very high temperature (≥1400°C) steam oxidation resistance of thin-walled FeCrAl tubes is being investigated as an alternative to Zr-based alloys for enhanced accident-tolerant light water reactor fuel cladding. Initial work examined commercial FeCrAl with ~20% Cr in ramp testing with 1 min hold times at temperatures up to 1700°C. At 1400–1500°C, excellent oxidation resistance was observed with thin external alumina scales formed in contrast to the thick oxides formed on Zircaloy-4 under similar conditions. For an optimized FeCrAl with 13% Cr, one batch of tubing performed poorly a

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7

Cao, X. A., S. J. Pearton, R. K. Singh, et al. "Rapid Thermal Processing of Implanted GaN up to 1500°C." MRS Internet Journal of Nitride Semiconductor Research 4, S1 (1999): 671–77. http://dx.doi.org/10.1557/s1092578300003239.

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GaN implanted with donor(Si, S, Se, Te) or acceptor (Be, Mg, C) species was annealed at 900-1500 °C using AlN encapsulation. No redistribution was measured by SIMS for any of the dopants and effective diffusion coefficients are ≤2 × 10−13 cm2. s−1 at 1400 °C, except Be, which displays damage-enhanced diffusion at 900 °C and is immobile once the point defect concentration is removed. Activation efficiency of ∼90% is obtained for Si at 1400 °C. TEM of the implanted material shows a strong reduction in lattice disorder at 1400-1500 °C compared to previous results at 1100 °C. There is minimal inte

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8

Ebadzadeh, Touradj, and H. Barzegar-Bafroei. "Synthesis and Sintering of Mullite Ceramics Using Microwave Heating." Advances in Science and Technology 62 (October 2010): 232–34. http://dx.doi.org/10.4028/www.scientific.net/ast.62.232.

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Mullite ceramics have been known as the engineering materials due to their special properties such as high refractoriness, good thermal shock resistance, low thermal expansion, good strength at low and high temperatures, good creep resistance and low dielectric constant. In the present work, mullite samples were prepared by reaction sinteing of alumina and silica gel and subsequent sintering in a microwave process. The sintering of samples was carried out at temperatures in the range of 1400-1500°C with no soaking time. Density and porosity measurements showed a high density (89.3% TD) and low

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9

Silver, Larry, and John Rowlands. "The Age of Durer and Holbein. German Drawings 1400-1500." Sixteenth Century Journal 20, no. 3 (1989): 527. http://dx.doi.org/10.2307/2540833.

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10

Tahier, Siti Suryani, Tri Saptari Haryani, and Sri Wiedarti. "KEANEKARAGAMAN ANGGREK DI CAGAR ALAM DAN TAMAN WISATA ALAM TELAGA WARNA, PUNCAK, BOGOR." EKOLOGIA 18, no. 2 (2020): 83–93. http://dx.doi.org/10.33751/ekol.v18i2.1656.

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The existence of orchids is often threatened with extinction that can be caused by natural damage. In addition, the continuous harvesting of orchids from nature without considering its sustainability can threaten the extinction of orchids in a region. There is a need for knowledge about the diversity of orchids so that it can be the basis of conservation in a region specifically nature reserve and Nature Park Bogor. Research using transect methods and data collection conducted using field observation techniques. The observation area consists of three locations altitude: 1400, 1500 and 1600 m a

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11

Oliveira, H. C. P., L. H. F. Borges, Rômulo Crespo Tardim, M. S. Freitas, Guerold Sergueevitch Bobrovinitchii, and Marcello Filgueira. "Microstructural Analysis of Hardmetal Using WC Nanometric Powders." Materials Science Forum 660-661 (October 2010): 145–51. http://dx.doi.org/10.4028/www.scientific.net/msf.660-661.145.

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Nanometric powders of WC with 10 weight% Co were mixed in high-energy mill. Compaction was performed at 200MPa and processed by the technique of high pressure and high temperature (HPHT). Sintering conditions were P = 5GPa, T = 1300-1400-1500° C, t = 2-4 min. For comparative purposes, samples were conventionally sintered at T = 1400° C, t = 45 min, vacuum of 10-2 mbar.

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12

Guo, Shuqi, Naoto Hirosaki, Yoshinobu Yamamoto, Toshiyuki Nishimura, and Mamoru Mitomo. "Dependence of fracture stress on applied stress rate in a Yb2O3–SiO2-doped hot-pressed silicon nitride ceramic." Journal of Materials Research 16, no. 11 (2001): 3254–61. http://dx.doi.org/10.1557/jmr.2001.0448.

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High-temperature fracture behavior of a Yb2O3–SiO2–doped hot-pressed silicon nitride (Si3N4) ceramic was investigated in four-point flexure between 1000 and 1500 °C at five crosshead speeds, using the specimens precracked with three indentation loads. Above 1000 °C, a temperature and stressing rate dependence of fracture stress was seen. At 1200 °C the fracture stress of the precracked specimens increased with decreasing stressing rates due to a toughening effect, the absence of slow crack growth (SCG). However, at 1400 and 1500 °C the fracture stress decreased with decreasing stressing rate.

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13

Dardess, John. "A CENTURY OF SOCIAL CHANGE: T'AI-HO COUNTY, KIANGSI 1400–1500." Ming Studies 1988, no. 1 (1988): 56–60. http://dx.doi.org/10.1179/014703788788764075.

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14

Shakeri, Fatemeh, Abolfath Shojai, Masoud Golalipour, Somaye Rahimi Alang, Hamid Vaez, and Ezzat Allah Ghaemi. "SpaDiversity among MRSA and MSSA Strains ofStaphylococcus aureusin North of Iran." International Journal of Microbiology 2010 (2010): 1–5. http://dx.doi.org/10.1155/2010/351397.

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Protein A ofStaphylococcus aureusis a pathogenic factor whose encoding gene,spa, shows a variation in length in different strains. In this study thespagene variation inS. aureusisolated from healthy carriers and patients was studied, We also compared this variation among MRSA with MSSA strains. 208 strains ofStaphylococcus aureuswhich we were isolated from Gorgan, north of Iran were studied, 121 cases from patients and 87 cases from healthy carriers, 59 out of them wereMRSAand 149MSSA. Samples DNA were extracted and amplified by specific primer ofspagene. In 4 (3.8%) strains of them nospagene

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15

Sara, Ole K. "Program og åpning av konferansen." Rangifer 2, no. 1-App (2013): 1. http://dx.doi.org/10.7557/2.2.1-app.449.

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NORs formann Ole K. Sara åpnet konferansen kl 1400 28 september 1981, og den ble avsluttet kl 1500 onsdag 30 september. Temaet "Tap av rein" ble inngående drøftet gjennom foredrag, diskusjoner og gruppearbeid.

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16

Zhang, Rui, and Pekka Taskinen. "Phase Equilibria in the BaO-SiO₂-Al₂O₃ Ternary System at 1500 °C." Key Engineering Materials 697 (July 2016): 565–71. http://dx.doi.org/10.4028/www.scientific.net/kem.697.565.

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Phase equilibria of the BaO-SiO2-Al2O3 ternary system was experimentally investigated using a quenching technique and analyzed by Scanning Electron Microscopy (SEM) equipped with Energy Dispersive Analysis (EDS) and X-ray Powder Diffraction (XRD). A ternary compound was confirmed in the present work. The liquidus composition in equilibrium with the ternary compound at 1500 °C were quantified. The isothermal sections of the BaO-SiO2-Al2O3 ternary system at 1400 °C, 1500 °C, 1600 °C, and 1700 °C were calculated. Based on the data acquired, the isothermal section at 1500 °C was constructed.

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17

Trindade, Willian, Marcelo Henrique Prado da Silva, Alaelson Vieira Gomes, Carlos Frederico de Matos Chagas, Luis Henrique Leme Louro, and José Brant de Campos. "Comparative Study of Solid-Phase and Liquid-Phase Assisted Sintering of Nb₂O₅-Doped Alumina." Materials Science Forum 798-799 (June 2014): 691–95. http://dx.doi.org/10.4028/www.scientific.net/msf.798-799.691.

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This work investigated the sintering behavior of alumina doped with 4wt% niobia. Three sintering temperatures were investigated: 1400°C, 1450°C and 1500°C. The first temperature leads to solid-phase assisted sintering (SSS) while the other ones develop liquid-phase assisted sintering (LPS). The presence of liquid phase in the second case is due to an eutectic reaction occurring at 1440°C ± 20°C in the alumina-niobia system. The sintering behavior was assessed by measuring the final densities. The results indicated that the 1400°C solid-state sintering, comparatively, was better. This paper pro

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18

UETSUKI, Toru, Kaichiro TANAKA, Masao MAEKAWA, Takayoshi OBATA, Nobuo TAMAKI, and Yasuro NAKAZAWA. "The Compatibility Relationships in the System ZrO2-CaO-SiO2 at 1400°-1500°C." Journal of the Ceramic Association, Japan 93, no. 1080 (1985): 418–25. http://dx.doi.org/10.2109/jcersj1950.93.1080_418.

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19

Yang, Huan Ying, Yong Li, Wen Bin Xia, and Yan Jing Li. "Investigation on Oxidation Resistance of the Flint Clay-Andalusite-Silicon Carbide Composite." Advanced Materials Research 476-478 (February 2012): 1557–61. http://dx.doi.org/10.4028/www.scientific.net/amr.476-478.1557.

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The composite samples using flint clay, andalusite and silicon carbide as starting material are made from the proportion of 35:60:5, 45:50:5, 55:40:5, 65:30:5 respectively. The samples are sintered at 1200°C,1300°C,1400°C,1450°C and 1500°C holding 4hrs separately. Both microstructure and mechanism of oxidation were analyzed by XRD and SEM. The results show that the samples have good resistance against oxidization below 1500°C, only the sample of fourth formula perform excellent and have the thinnest oxidation layer between all the formulas at 1500°C.

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20

Iwamoto, Naoya, Shinobu Onoda, Natsuko Fujita, Takahiro Makino, and Takeshi Ohshima. "Defect Levels in High Purity Semi-Insulating 4H-SiC Studied by Alpha Particle Induced Charge Transient Spectroscopy." Materials Science Forum 778-780 (February 2014): 289–92. http://dx.doi.org/10.4028/www.scientific.net/msf.778-780.289.

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Defect levels in high purity semi-insulating 4H silicon carbide substrates are studied by charge transient spectroscopy using 5.5 MeV alpha particles. A shallow defect level with the activation energy around 0.3 eV is found in all samples annealed at temperatures from 1400 to 1600 °C. Some other defect levels lying at deeper in the bandgap are found in samples annealed at 1400 and 1500 °C. As these deep levels are annealed out by 1600 °C, the series resistance of samples is decreased.

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21

Bard, Kathryn. "A Quantitative Analysis of the Predynastic Burials in Armant Cemetery 1400-1500." Journal of Egyptian Archaeology 74 (1988): 39. http://dx.doi.org/10.2307/3821746.

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22

Bard, Kathryn. "A Quantitative Analysis of the Predynastic Burials in Armant Cemetery 1400–1500." Journal of Egyptian Archaeology 74, no. 1 (1988): 39–55. http://dx.doi.org/10.1177/030751338807400105.

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Cemetery 1400–1500 at Armant, excavated by Mond and Myers in the 1930s, is the best-recorded Predynastic cemetery in Egypt. With burials dating to Nagada I, II, and III, the cemetery provides data for a crucial period of social evolution in Egypt. Quantitative methods of analysis show that both mean grave size and mean number of grave goods increase through time. Although clusters of graves show differentiation into two basic hierarchies of grave types, there is a lack of overall complexity in the Armant burials, probably indicative of a society which was not very stratified.

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23

Whittenberger, J. Daniel, Eduard Arzt, and Michael J. Luton. "1400 and 1500 K compressive creep properties of an NiAlAlN composite." Scripta Metallurgica et Materialia 26, no. 12 (1992): 1925–30. http://dx.doi.org/10.1016/0956-716x(92)90060-r.

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24

Hadi, Syamsul, Husein Jaya Andika, Agus Kurniawan, and Suyitno. "Electrical Conductivity Measurements of Al-Doped ZnO Semiconductor in High Temperature." Key Engineering Materials 772 (July 2018): 105–9. http://dx.doi.org/10.4028/www.scientific.net/kem.772.105.

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Electrical conductivity plays an important role in the performance of thermoelectric semiconductor material. This study discusses the electrical conductivity measurements of Zinc Oxide (ZnO) doping Aluminium (Al) pellet as a material of thermoelectric using four-point probe method at high temperatures. Al-doped ZnO (2 wt%) pellet was sintered at the temperature of 1100°C, 1200°C, 1300°C, 1400°C, and 1500°C with the heating rate of 8°C/minute. SEM and XRD tests show that the higher sintering temperature effects to larger grain sizes, better crystallinity, and lower porosity. There is no electri

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25

Gómez, Sofía, Gustavo Suárez, Nicolás Rendtorff, and Esteban Aglietti. "Relation between mechanical and textural properties of dense materials of tetragonal and cubic zirconia." Science of Sintering 48, no. 1 (2016): 119–30. http://dx.doi.org/10.2298/sos1601119g.

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In the current paper we present a study of the sinterability of two zirconia (ZrO2) nanopowders with different content of yttrium oxide (Y2O3) 3 and 8 % tetragonal and cubic zirconia, respectively. After sintering between 900-1500?C, the samples were characterized in terms of their density and porosity using Archimedes technique. Their grain size was evaluated using scanning electron microscope (SEM). Vickers hardness and fracture toughness (KIC) were measured by the indentation method. The results showed that pores are almost eliminated at sintering temperatures higher than 1400?C and grain s

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26

Yan, Zheng, Haoran Peng, Kang Yuan, and Xin Zhang. "Optimization of Yb2O3-Gd2O3-Y2O3 Co-Doped ZrO2 Agglomerated and Calcined Powders for Air Plasma Spraying." Coatings 11, no. 4 (2021): 373. http://dx.doi.org/10.3390/coatings11040373.

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Yb2O3-Gd2O3-Y2O3 co-doped ZrO2 (YGYZ) is considered to be a promising material in thermal barrier coating (TBC) applications. In this study, 2Yb2O3-2Gd2O3-6Y2O3-90ZrO2 (mol.%) (10YGYZ) feedstock candidates for air plasma spraying (APS) were prepared by calcination of agglomerated powders at 1100, 1200, 1300, 1400, and 1500 °C for 3 h, respectively. Incomplete solid solution was observed in calcined powders at 1100, 1200 and 1300 °C, and the 1500 °C calcined powder exhibited poor flowability due to intense sintering effect. The 1400 °C calcined powders were eventually determined to be the optim

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27

Bai, Ling, Chang Chun Ge, Wei Ping Shen, Ke Zhang та X. D. Mao. "Densification and α/β Phase Transformation of SHS Si₃N₄ Containing Al₂O₃ and Y₂O₃ during Sintering". Materials Science Forum 561-565 (жовтень 2007): 577–80. http://dx.doi.org/10.4028/www.scientific.net/msf.561-565.577.

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The densification and phase transformation of high α-phase silicon nitride powder synthesized by SHS with a combination of Y2O3 and Al2O3 sintering additives were investigated. The densification process occurred rapidly from 1400 to 1500 °C and was nearly finished at 1500 °C. However, the α-β transformation of silicon nitride progressed rapidly from 1500 to 1600 °C, and completed at 1600 °C. The phase transformation of silicon nitride lagged behind the densification of Si3N4 ceramics. It showed that the solution and precipitation process did not play the main role in the densification of silic

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28

Loong, Teow Hsien, Ananthan Soosai, and Suresh Muniandy. "Effect of Temperature and Holding Time on Zirconia Toughened Alumina (ZTA) Prepared by Two-Stage Sintering." Materials Science Forum 1030 (May 2021): 11–18. http://dx.doi.org/10.4028/www.scientific.net/msf.1030.11.

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The microstructure and mechanical properties of Zirconia Toughened Alumina (ZTA) produced via two-stage sintering at various sintering temperature of T1 and T2 in addition to effect of various holding time were investigated. T1 temperature was set between the range of 1400°C to 1500°C with a heating rate of 20°C/min. The samples were then sintered at T2 ranging from 1350°C to 1400°C followed by various holding time between 2 hours to 12 hours. The sintered samples’ microstructural properties, bulk density, hardness (Vickers hardness), elastic modulus (Young’s modulus) and fracture toughness (K

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29

Kayaphan, Wichita, and Pornsuda Bomlai. "Microstructural and Electrical Properties of Sn-Modified BaTiO3 Lead-Free Ceramics by Two-Step Sintering Method." Advances in Materials Science and Engineering 2018 (2018): 1–6. http://dx.doi.org/10.1155/2018/9048062.

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Ba(Ti0.92Sn0.08)O3 lead-free ceramics were prepared using a two-step sintering (TSS) technique. Varying the first sintering temperature T1 (1400 and 1500°C) and the dwell time t1 (0, 15, and 30 min), we obtained dense ceramics which were then soaked at a constant temperature of 1000°C (T2) for 6 h (t2). The structural and electrical properties were investigated. XRD results indicated that all the ceramics showed a pure perovskite phase with tetragonal symmetry. Density and grain size increased with higher T1 temperatures and increased t1 dwell times. Enhanced electrical properties were achieve

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30

., SUDARMONO. "Decreased populations of Scutellaria discolor and Plectranthus galeatus (Lamiaceae) on Mount Gede, West Java, Indonesian and its surrounding." Biodiversitas Journal of Biological Diversity 19, no. 5 (2018): 1866–70. http://dx.doi.org/10.13057/biodiv/d190538.

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Sudarmono. 2018. Decreased populations of Scutellaria discolor and Plectranthus galeatus (Lamiaceae) on Mount Gede, West Java, Indonesian and its surrounding. Biodiversitas 19: 1866-1870. Scutellaria discolor Colebr. and Plectranthus galeatus Vahl. are herbs belonging to mint family (Lamiaceae) which have the potential to be used for medicinal purposes. However, their population is gradually declining. The population of the two species are now only found in the mountains or highlands or the edges of the forests that are still protected, i.e. Mount Gede and Telaga Warna protected forest. This r

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31

TARR, ROGER. "FROM FLANDERS TO FLORENCE: THE IMPACT OF NETHERLANDISH PAINTING 1400–1500, PAULA NUTTALL." Art Book 13, no. 3 (2006): 40–41. http://dx.doi.org/10.1111/j.1467-8357.2006.00698.x.

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32

Guo, S., N. Hirosaki, T. Nishimura, Y. Yamamoto, and M. Mitomo. "Compressive creep behaviour of Yb4Si2O7N2containing silicon nitride ceramic between 1400 and 1500°C." Materials Science and Technology 19, no. 4 (2003): 544–48. http://dx.doi.org/10.1179/026708303225001911.

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33

María Jesús Lacarra Ducay, María. "Libro del infante don Pedro de Portugal / Santisteban, Gómez de (flor. 1400-1500)." Catálogo de obras medievales impresas en castellano 2021, no. 2021 (2021): 1———. http://dx.doi.org/10.26754/uz_comedic/comedic_cmdc78.

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34

Zhang, Hong Song, Ren Xi Hu, and Qiang Xu. "Forming Mechanism of Dy₂Ce₂O₇ Ceramic for Thermal Barrier Coatings." Advanced Materials Research 105-106 (April 2010): 383–85. http://dx.doi.org/10.4028/www.scientific.net/amr.105-106.383.

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The forming mechanism of Dy2Ce2O7 prepared by solid reaction using CeO2 and Dy2O3 as reactants was analyzed by X-ray diffraction method. It is indicated that there is almost no solid solution reaction between Dy2O3 and CeO2 before 1300°C, the Dy3+ cations enter the crystal lattice of CeO2 and substitute sites of Ce4+ cations in the range between 1300°C and 1400°C which resulted in the formation of Dy2O3-CeO2 solid solution. The Dy2O3-CeO2 solid solution transformed gradually into Dy2Ce2O7 after 1400°C and pure Dy2Ce2O7 can be obtained at 1500°C. No other intermediate phases were found in the w

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35

Xin, Ou Yang, Sai Fang Huang, Ming Hao Fang, Zhao Hui Huang, and Yan Gai Liu. "Phase Analysis of Forsterite in Carbothermal Reduction Processing." Advanced Materials Research 105-106 (April 2010): 848–50. http://dx.doi.org/10.4028/www.scientific.net/amr.105-106.848.

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In this paper, phase transition of forsterite in carbothermal reduction processing was studied. Phase composition and microstructure of the products were characterized by XRD, SEM and XRF. The influences of calcination temperature (1400, 1500, and 1600 °C), carbon content (lacking 50% and 10%, theoretical content, exceeding 10%, 50% and 100%) and holding time (1 h, 2 h and 4 h) on phase composition of carbothermal reduction products were discussed. The results showed that forsterite can be reduced to β-SiC, Fe and MgAl2O4 when it was reacted with carbon exceeded 50wt% of theoretical content at

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36

Chin, K. M. Christopher, K. Y. Sara Lee, C. Y. Tan, Ramesh Singh, and W. D. Teng. "Characterization of Forsterite Synthesized by Solid-State Reaction with Ball Milling Method." Applied Mechanics and Materials 372 (August 2013): 416–19. http://dx.doi.org/10.4028/www.scientific.net/amm.372.416.

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Talc and magnesium oxide are used to prepare forsterite (Mg2SiO4) powder by solid-state reaction with ball milling method. The samples were sintered at temperature 1200°C, 1300°C, 1400°C and 1500°C with four different holding time duration 2 hours, 1 hour and 1 minute with ramp rate of 10°C/min respectively via conventional pressureless sintering method. 3 hours ball milling is sufficient to form pure forsterite without any secondary phase. Highest values for fracture toughness (3.8 MPa.m1/2) and Vickers micro-hardness (5.0 GPa) recorded with sintering temperature 1500°C with 1 hour holding ti

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37

Ji, Hai Peng, Zhao Hui Huang, Kai Chen, Ming Hao Fang, Jun Tong Huang та Yan Gai Liu. "Phase and Microstructure Evolution of Mullite Synthesized from Coal Gangue and γ-Al₂O₃". Advanced Materials Research 624 (грудень 2012): 17–21. http://dx.doi.org/10.4028/www.scientific.net/amr.624.17.

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Mullite with puncheon-like grains was synthesized by sintering the mixtures of coal gangue and γ-Al2O3 at 1400 °C~1550 °C for 4 h. The phase and microstructure evolution of the mullitization behavior were investigated by XRD, SEM and EDS. Phases of the sintered specimens were mullite, corundum and cristobalite at 1400 °C to 1450 °C. Arise of temperature would enhance mullitization, and total consumption of cristobalite occurred from 1500 °C upward. The in-situ produced primary mullite from gangue upon heating may be seeds for the growth of enenly dispersed mullite puncheons. Specimen sintered

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38

ZIMINA, Valentina A. "EXPERIMENTAL INVESTIGATION OF THE STRUCTURE, ELASTIC, AND STRENGTH CHARACTERISTICS OF POROUS CORUNDUM CERAMICS." Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mekhanika, no. 67 (2020): 117–26. http://dx.doi.org/10.17223/19988621/67/11.

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This paper aims to investigate the internal structure and to evaluate the elastic and strength characteristics of the corundum ceramic samples sintered at different temperatures. The average value of porosity of the sintered samples at the temperatures of 1400, 1500, and 1600 °C is 33, 26, and 17%, respectively. Mechanical tests of the ceramic samples are performed using the threepoint bending method. The ultimate bending strength varies from 135 to 265 MPa in the studied sintering temperature range. The elastic moduli of the sintered samples are found to be in the range of 58 – 113 GPa. An an

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39

Li, Xiang, Kai Tang, and Merete Tangstad. "Reduction and Dissolution Behaviour of Manganese Slag in the Ferromanganese Process." Minerals 10, no. 2 (2020): 97. http://dx.doi.org/10.3390/min10020097.

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The reduction and liquidus behaviour of manganese slag with different basicities were studied in non-isothermal experiments in the temperature range of 1400–1500 °C. Certain amounts of quartz were added to Assmang ore (South Africa), and lime was added to Comilog ore (Gabon), to adjust the charge basicity to 0.5, 0.8 and 1.2. The extent of manganese ore reduction as a function temperature were determined by thermo-gravimetric (TG) balance. Morphology of ores and its change in the course of reduction was examined by scanning electron microscopy (SEM). The results show that the reduction rate of

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Delwiche, Stephen R., Karl H. Norris, and Ronald E. Pitt. "Temperature Sensitivity of Near-Infrared Scattering Transmittance Spectra of Water-Adsorbed Starch and Cellulose." Applied Spectroscopy 46, no. 5 (1992): 782–89. http://dx.doi.org/10.1366/0003702924124781.

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Near-infrared spectroscopy was used to examine unmodified wheat starch and microcrystalline cellulose (MCC) at temperatures of −80 to 60°C and water activities of 0.22−0.94 aw. A commercially available liquid transmittance cell was modified to permit collection of scattering transmittance spectra of powdered samples. Changes to the shape, peak location, and intensity of the 1400–1500 and 1900–2000 nm water absorption bands were measured as temperature varied. Results indicated that frozen water was not detected at any of the temperatures or aw examined. All water was strongly associated with t

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Sun, Yong Qiang, Yong Li, Shuo Cao, Hao Bo Zhang, Chang He Gao, and Ji Li Zhang. "Research on High Temperature Creep Properties of Al₂O₃-SiO₂ Ore (Al₂O₃ ~ 65)." Key Engineering Materials 680 (February 2016): 343–46. http://dx.doi.org/10.4028/www.scientific.net/kem.680.343.

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High temperature creep properties of Al2O3-SiO2 ore (65% Al2O3 by mass percentage, abbreviation for Al2O3~65) was studied. The results show that the creep rates at 1300 °C × 50h, 1400 °C × 50h and 1500 °C × 50h were-0.89% ,- 1.75%, - 5.76%,respectively. At 1300 °C, ore has good creep resistance. As the temperature increases, the high temperature creep resistance of Al2O3 ~ 65 bauxite ore is significantly reduced. Creep process can be divided into two stages: when the time t <30h, the sample are in the densification process; after 30 hours, the creep properties show that the relationship bet

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Loong, Teow Hsien, Ananthan Soosai, and Suresh Muniandy. "Densification Behaviour and Mechanical Properties on MgO Doped Zirconia Toughened Alumina (ZTA) Prepared by Two-Stage Sintering." Materials Science Forum 1030 (May 2021): 3–10. http://dx.doi.org/10.4028/www.scientific.net/msf.1030.3.

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The effect of doping small amounts of Magnesium Oxide ranging between 0 to 1 vol% on Zirconia Toughened Alumina (ZTA) composites which is one of main biomaterial used for production of total hip arthroplasty were investigated. The samples were produced via conventional two-stage sintering with T1 varies between 1450°C and 1550°C with heating rate of 20°C/min. The samples were then rapid cooled to T2 set at 1400°C with holding time of 12 hours. The microstructural and mechanical properties of the two-stage sintered ZTA are then investigated to determine the feasibility of MgO addition. Combinat

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Chen, Xiaoyan, Menghan Li, Erik A. Sperling, et al. "Mesoproterozoic paleo-redox changes during 1500–1400 Ma in the Yanshan Basin, North China." Precambrian Research 347 (September 2020): 105835. http://dx.doi.org/10.1016/j.precamres.2020.105835.

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Dvoirin, V. V., V. M. Mashinskii, O. I. Medvedkov, A. A. Umnikov, Aleksei N. Gur'yanov, and Evgenii M. Dianov. "Bismuth-doped telecommunication fibres for lasers and amplifiers in the 1400–1500-nm region." Quantum Electronics 39, no. 6 (2009): 583–84. http://dx.doi.org/10.1070/qe2009v039n06abeh014119.

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Meng, Fan Cheng, Xiao Lei Zhang, Ying Zhang, et al. "Fast Fabrication and Wear Behavior of Alumina–Nickel Composites." Advanced Materials Research 624 (December 2012): 94–97. http://dx.doi.org/10.4028/www.scientific.net/amr.624.94.

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Alumina matrix composites containing 20 wt % of Ni was sintered by spark plasma sintering (SPS) process. The influence of sintering temperature (1400-1550 °C) on densification and grain size of the composites were investigated (heating rate: 200 °C /min, sintering time: 5 min). Wear behavior of samples obtained by SPS were evaluated in a dry condition with reciprocate ball-on-disk testing machine. The results show that the relative density and alumina grain sizes increase with the increasing sintering temperature, and the fine-grained structure (alumina size controlled in 1–2 µm) are obtained

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Viravathana, Pinsuda, Narathorn Sukwises, Siriporn Boonpa, and Siriporn Larpkiattaworn. "Na₂WO₄-Mn/mullite Catalysts for Oxidative Coupling of Methane." Advanced Materials Research 287-290 (July 2011): 3015–19. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.3015.

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The catalysts, 5 wt% Na2WO4-2 wt% Mn on mullites sintered at 1200°C, 1300°C, 1400°C, and 1500 °C, were prepared by incipient wetness impregnation method for the oxidative coupling of methane (OCM) reaction in a fixed-bed quartz tube reactor. These catalysts were characterized by XRD, XPS and BET method. The XRD pattern of Na2WO4-Mn/mullite indicated that the main crystal phase of metal oxide was MnWO4. From the XPS spectra, the results revealed the information on Na, W and Mn species distributed on the catalyst surface. For catalytic activity testing, Na2WO4-Mn/mullite sintered at 1300 °C show

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Tian, Y., Y. Qiu, Y. Chai, P. Bai, and C. Gong. "The effect of sintering temperature on the structure and properties of calcium hexaluminate/anorthite ceramics." Science of Sintering 45, no. 2 (2013): 141–47. http://dx.doi.org/10.2298/sos1302141t.

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The calcium hexaluminate/anorthite composite are prepared by magnesia slag, kaolin and industrial alumina at different sintering temperature. The effect of sintering temperature on the structure and properties are investigated by X-ray powder diffraction and scanning electron microscopy. The results show that the calcium hexaluminate begins to form at 1300?C and continues to form in a large amount between 1400?C and 1500?C, however, there is a phase transitions form gehlenite to anorthite between 1300?C and 1400?C. CA6 grow preferentially along the basal plane direction. When the crystals touc

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Zheng, Ming Yue, You Fu Guo, Jing Long Bu, Yue Jun Chen, Li Xue Yu, and Zhi Fa Wang. "Influence of Grain Composition and Sintering Temperature on Performance of Silicon Carbide Refractory Material." Applied Mechanics and Materials 217-219 (November 2012): 1131–34. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.1131.

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Silicon carbide with diffierent granularity and three grain composition was used as raw material. Silicon carbide refractory material was prepared in oxidizing atmosphere at 1400 °C, 1450 °C and 1500 °C for 3 h. Performence of samples were researched by measurements of apparent porosity, bulk density, bending strength at room temperature, thermal shock resistance and thermal expansion rate, and analyzed by SEM. The results showed that samples sintered at 1400 °C have low thermal expansion rate and apparent porosity, high bending strength and bulk density, good thermal shock resistance, compact

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Binford, Michael W., Alan L. Kolata, Mark Brenner, et al. "Climate Variation and the Rise and Fall of an Andean Civilization." Quaternary Research 47, no. 2 (1997): 235–48. http://dx.doi.org/10.1006/qres.1997.1882.

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Paleolimnological and archaeological records that span 3500 years from Lake Titicaca and the surrounding Bolivian–Peruvian altiplano demonstrate that the emergence of agriculture (ca. 1500 B.C.) and the collapse of the Tiwanaku civilization (ca. A.D. 1100) coincided with periods of abrupt, profound climate change. The timing and magnitude of climate changes are inferred from stratigraphic evidence of lake-level variation recorded in14C-dated lake-sediment cores. Paleo-lake levels provide estimates of drainage basin water balance. Archaeological evidence establishes spatial and temporal pattern

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Zhou, Mi, Rui Hu, Jieren Yang, Chuanjun Wang, and Ming Wen. "Determination of Constitutive Equation and Thermo–Mechanical Processing Map for Pure Iridium." Metals 10, no. 8 (2020): 1087. http://dx.doi.org/10.3390/met10081087.

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Deformation behavior of pure iridium has been studied during thermal compression testing with the help of Gleeble-1500D in the temperature range of 1200 °C~1500 °C and strain rate range of 10−1 s−1~10−2 s−1. Resistance to deformation, microstructural evolution and hot workability of pure iridium have been used to analyze in detail. Frictional coefficient has been used to modify the experimental stress–strain curve of thermal compression test, and it has been found effective in reducing the influence of friction during thermo–mechanical testing. The hyperbolic sine constitutive equation of pure

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