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Journal articles on the topic 'Al2O3+TiO2'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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1

Márquez Aguilar, P. A., M. Vlasova, S. Lakiza, M. Kakazey, A. Bykov, and V. Stetsenko. "Laser Synthesis Features of Composite Ceramics Y3Al5O12-Y2Ti2O7-Al2O3-Al2TiO5." Advances in Science and Technology 88 (October 2014): 74–79. http://dx.doi.org/10.4028/www.scientific.net/ast.88.74.

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The effect of directed laser treatment on the compacted binary mixtures Al2O3–Y2O3, Y2O3–TiO2, Al2O3–TiO2 and ternary mixtures Al2O3−Y2O3−TiO2 was investigated. It was shown that phase formation occurs within the framework of binary mixtures Al2O3–Y2O3, Y2O3–TiO2, Al2O3–TiO2 and is accompanied by the formation of Y3Al5O12, Y2Ti2O7 and Al2TiO5 compounds. The set of phases and microstructures of generated ceramics depend on Al2O3 content and TiO2/Y2O3 ratio in initial mixtures. Basing in the obtained results the tentative phase diagram for the Al2O3–Y2O3−TiO2 system was constructed.
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2

Yan, Jing Sen, and Hai Yan Wang. "Preparation and Performance of Ni2P/TiO2-Al2O3 for Hydrodenitrogenation." Advanced Materials Research 634-638 (January 2013): 575–80. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.575.

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A series of TiO2-Al2O3 composite supports were prepared by hydrolysis and deposition of tetrabutyl titanate on macropore Al2O3, and the nickel phosphide catalyst, Ni2P/TiO2-Al2O3, Ni2P/TiO2 and Ni2P/ Al2O3 were prepared by incipient wetness impregnation and in situ H2 reduction method. Their hydrodenitrogenation(HDN) performance were evaluated on a continuous-flow fixed-bed reactor by using quinoline as the model molecules . The results show that the TiO2-Al2O3 composite support still retained the pore properties of macropore Al2O3, and anatase TiO2 were well dispersed on the Al2O3 surface. Di
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3

Haerudin, Hery, Wihatmoko Waskitoaji, and Usman Usman. "EFFECT OF THE REDUCTION TEMPERATURE INTO CATALYTIC ACTIVITY OF Ni SUPPORTED BY TiO2, AL2O2 AND TiO2/AL2O3 FOR CONVERSION CO2 INTO METHANE." Indonesian Journal of Chemistry 3, no. 1 (2010): 24–31. http://dx.doi.org/10.22146/ijc.21902.

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Nickel catalysts, containing 6% (w/w) of nickel, have been prepared using TiO2, Al2O3 and mixture of TiO2-Al2O3 (1:9). The catalysts were used for CO2 conversion into methane. The characteristics of catalysts were studied by determination of its specific surface area, temperature programmed reaction technique and X-ray diffraction. The specific surface area were varied slightly by different temperature of reduction, namely after reduction at 300°C it was 39, 120 and 113 m2/g and after reduction at 400°C it was 42, 135 and 120 m2/g for 6% nickel catalysts supported on TiO2, Al2O3 and mixture of
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4

Jiang, Chao Ping, Ya Zhe Xing, and Jian Min Hao. "Effects of Oxide Powders and Nanocrystalline Particles on the Sintering of Al2O3 Glass-Ceramics." Advanced Materials Research 337 (September 2011): 91–94. http://dx.doi.org/10.4028/www.scientific.net/amr.337.91.

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The effects of CuO, TiO2 and B2O3 oxides and nanocrystalline Al2O3+ TiO2 particles on the sintering of Al2O3 glass-ceramics were investigated by X-ray diffraction and scanning electron microscopy. The CuO and TiO2 oxides can effectively facilitate the formation of CuO–Al2O3–TiO2 glass ceramic. The CuO, TiO2 and Al2O3 oxides can form the new phase Cu2Ti4O and CuAl2O4. They wrapped the Al2O3 grains tightly, so the density ceramic was fabricated successfully sintered at 1300°C. Analyzing the fracture surface morphology, the ceramic added CuO, TiO2 oxides shows the mixed mode of intergranular and
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5

Dejang, Nuchjira, Anucha Watcharapasorn, Sittichai Wirojupatump, Simo Pekka Hannula, and Sukanda Jiansirisomboon. "The Investigated Microstructure and Mechanical Properties of Al2O3/20wt% TiO2 Nanocomposite Coating." Advanced Materials Research 146-147 (October 2010): 641–45. http://dx.doi.org/10.4028/www.scientific.net/amr.146-147.641.

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The incorporation of nano-size TiO2 particles can significantly enhance the microstructure and mechanic properties of Al2O3 coating. Phase transformation from mainly stable α-Al2O3 and anatase-TiO2 in the powders to predominant metastable γ-Al2O3 and rutile-TiO2 in the coatings was observed. Reaction between Al2O3 and TiO2 phase also occurred producing new phase Al2TiO5 phase. Microstructural investigation showed that well separated TiO2 lamellas were homogeneously dispersed between Al2O3 lamellas. It was found that the plasma-sprayed composite coating possessed better wear resistance than tha
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6

Wang, You, D. L. Wang, G. Liu, W. Tian, and C. H. Wang. "The Influence of Powder Types and Plasma Spray Conditions on Abrasive Wear of Nanostructured and Conventional Al2O3/TiO2 Coatings." Materials Science Forum 539-543 (March 2007): 1294–99. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.1294.

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In this paper, Al2O3/TiO2 coatings via thermal spray approach using three different feedstock powders, i.e., (a) reconstituted nanosized Al2O3/TiO2 feedstock powders, (b) reconstituted nanosized Al2O3/TiO2/ZrO2/CeO2 feedstock powders and (c) conventional Al2O3/TiO2 feedstock powders are described. Effects of different powder types and various plasma spray conditions on the density, microhardness and crack resistance, especially on the abrasive wear behavior of the coatings have been evaluated. The result showed that the coatings sprayed using different feedstock powders exhibit different abras
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7

Xiang, N., Y. Q. Guo, C. Wang, J. R. Jin, Y. J. Ge, and R. G. Song. "Oxidation and Thermal Shock Resistance of As-Sprayed Coatings." Materials Performance 55, no. 6 (2016): 36–39. https://doi.org/10.5006/mp2016_55_6-36.

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Aluminum oxide/titanium dioxide (Al2O3/TiO2) nanostructured ceramic coatings were prepared on AISI H13 (UNS 720813) steel substrates by atmospheric plasma spraying. The x-ray diffraction pattern shows that α-Al2O3, γ-Al2O3, rutile-TiO2, AlN, and AlNi3 phases exist in the coatings. Oxidation test results show that the nanostructured coating with Al2O3-40 wt% TiO2 provides better oxidation resistance than the others. Thermal shock test results indicate that the effect of TiO2 content on the thermal shock lifetime is significant, and the Al2O3-13 wt% TiO2 nanostructured coating exhibits superior
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8

Yakdoumi, Fatima Zohra, and Assia Siham Hadj-Hamou. "Effectiveness assessment of TiO2-Al2O3 nano-mixture as a filler material for improvement of packaging performance of PLA nanocomposite films." Journal of Polymer Engineering 40, no. 10 (2020): 848–58. http://dx.doi.org/10.1515/polyeng-2020-0105.

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AbstractThe main objective of this study was to assess the effectiveness of TiO2-Al2O3 nano-mixture used as filler in improving packaging films performance. Polylactic acid/titanium dioxide (PLA/TiO2), polylactic acid/alumina (PLA/Al2O3) and polylactic acid/TiO2-Al2O3 (PLA/TiO2-Al2O3) nanocomposite films were successfully prepared via melt mixing process and thoroughly characterized by FTIR spectroscopy, X-ray diffraction (XRD), UV–vis spectroscopy, scanning electron microscopy (SEM), atomic force microscopy (AFM), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). T
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Michalak, Monika, Filofteia-Laura Toma, Leszek Latka, Pawel Sokolowski, Maria Barbosa, and Andrzej Ambroziak. "A Study on the Microstructural Characterization and Phase Compositions of Thermally Sprayed Al2O3-TiO2 Coatings Obtained from Powders and Water-Based Suspensions." Materials 13, no. 11 (2020): 2638. http://dx.doi.org/10.3390/ma13112638.

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In this work, the alumina (Al2O3) and alumina-titania coatings with different contents of TiO2, i.e., Al2O3 + 13 wt.% TiO2 and Al2O3 + 40 wt.% TiO2, were studied. The coatings were produced by means of powder and liquid feedstock thermal spray processes, namely atmospheric plasma spraying (APS), suspension plasma spraying (SPS) and suspension high-velocity oxygen fuel spraying (S-HVOF). The aim of the study was to investigate the influence of spray feedstocks characteristics and spray processes on the coating morphology, microstructure and phase composition. The results revealed that the micro
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10

Li, Zhi Qiang, and Jing Kun Yu. "Thermodynamic Analysis of Oxide Nucleation in Steel Cooling Process." Advanced Materials Research 282-283 (July 2011): 478–82. http://dx.doi.org/10.4028/www.scientific.net/amr.282-283.478.

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Nucleating mechanism and controlling methods of Al2O3-TiO2 inclusion formed during steel cooling process is analyzed in this paper. According to the theory of nucleation, only TiO2 could satisfy the critical requirement of homogeneous nucleation to solidify stably when the temperature declines to less than 1863K. Furthermore, the generation of Al2O3 adhering on the surface of solid TiO2 is going to take place through heterogeneous nucleation, and then Al2O3 interacts with TiO2 to form Al2O3-TiO2 complex oxide. There would be no Al2O3-TiO2 complex oxide or much less Al2O3 on condition that the
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11

Dong, Kai, Long Wu, and Wen Juan Liu. "Calculation on the Desulfurization Thermodynamic of CaO-Al2O3-SiO2-TiO2 Slag System." Applied Mechanics and Materials 563 (May 2014): 57–61. http://dx.doi.org/10.4028/www.scientific.net/amm.563.57.

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The desulfurization ability of CaO-Al2O3-SiO2-TiO2 slag at 1873 K was studied through theoretical calculation by using thermodynamic software FactSage. The effect of binary basicity is significant, compared with the mass percentage factors of Al2O3 and TiO2. Under the optimal experimental conditions, with the binary basicity is 7, the mass percentage of Al2O3 is 30 % and TiO2 is 3 %, the corresponding highest sulfur distribution coefficient for the slag are 58.14. While the content of TiO2 in the CaO-Al2O3-SiO2-TiO2 slag is in a range lower than 3-4 %, the desulfurization ability of the CaO-Al
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12

Bunyan, Sadiq Talal, and Abed Al-Khadhim M. Hasan. "Experimental Study of the Influence of Nanoparticles Additive to Diesel Fuel on the Emission Characteristics." Al-Khwarizmi Engineering Journal 17, no. 1 (2021): 13–19. http://dx.doi.org/10.22153/kej.2021.12.002.

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The present experimental work is conducted to examine the influence of adding Alumina (Al2O3) nanoparticles and Titanium oxide (TiO2) nanoparticles each alone to diesel fuel on the characteristic of the emissions. The size of both Alumina and Titanium oxide nanoparticles which have been added to diesel fuel to obtain nano-fuel is about 20 nm and 25 nm respectively. Three doses of (Al2O3) and (TiO2) were prepared (25, 50 and 100) ppm. The nanoparticles mixed with gas oil fuel by mechanical homogenous (manual electrical mixer) and ultrasonic processor. The study reveals that the adding of Alumin
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13

Bunyan, Shahad Fadhil. "The Effects of Hybrid Nano addition on Maxillofacial Silicone Elastomer VST50F Mechanical Properties." South Asian Research Journal of Medical Sciences 5, no. 02 (2023): 24–29. http://dx.doi.org/10.36346/sarjms.2023.v05i02.003.

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Purpose: To investigate the effects of hybrid nano (Tio2 – Al2o3) addition on maxillofacial silicone elastomer mechanical properties. Methods: A total of 70 samples were prepared and divided into 7 groups; control, 1% Tio2 (nano-titanium oxides), 2% Tio2, 1% Al2o3 (nano-alumina oxides), 2% Al2o3, 0.5% Tio2-0.5% Al2o3, and 1% Tio2-1% Al2o3. which was added to silicone elastomer. Samples were exposed to artificial weathering for 250 hours, then tested for tear strength and roughness tests. The data were analyzed using a one-way ANOVA to determine the differences between groups. Results: After ar
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14

Athanassopoulou, M. D., T. G. Argyropoulos, G. T. Paparoupas, J. A. Mergos, and C. T. Dervos. "The Effect of Al2O3 and Li2O on the Anatase to Rutile Phase Transformation." Defect and Diffusion Forum 297-301 (April 2010): 918–23. http://dx.doi.org/10.4028/www.scientific.net/ddf.297-301.918.

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The utilization of Al2O3 and Li2O as dopants that promote the anatase-to-rutile (A-R) phase transition in TiO2 nanoparticles during calcinations is studied. X-Ray Diffraction and SEM techniques were employed for the evaluation of phase transformation and particle size coarsening in pure TiO2, TiO2-Al2O3 and TiO2-Li2O mixtures. For the Li-Ti-O pseudobinary systems some complex oxides may be formed during phase transformation that occurs at significantly lower temperatures compared to pure TiO2 or TiO2-Al2O3 mixtures. Al2O3 doping in TiO2 only increases the anatase-to-rutile transition rate once
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15

Ha Thu, Huong, Nang Ho Xuan, Tuan Pham Anh, and Huy Pham Thanh. "Synthesis and Characterization of TiO2-Al2O3 Nanocomposite via Sol-gel Method." Vietnam Journal of Catalysis and Adsorption 10, no. 1S (2021): 63–68. http://dx.doi.org/10.51316/jca.2021.091.

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TiO2-Al2O3 nanocomposite has been successfully synthesized by a sol-gel method and eight-layers films on quartz substrates were prepared by a spin coating technique. This work investigated the effect of the Ti4+/Al3+ ratio and annealed temperature on the Anatase and Rutile phase transition of TiO2 in TiO2-Al2O3 nanocomposite, transmittance of thin films in the visible region, and hardness of thin film. FESEM images show that the surface of the TiO2-Al2O3 nanocomposite thin film at the molar ratio of TiO2-Al2O3=7:3 is relatively homogeneous and crack-free with the thickness 190 nm. TiO2-Al2O3 n
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16

Li, Jing Xin, Bao Hui Li, and Zhi Yong Li. "Removal of Toluene by Dielectric Barrier Discharge Combined with Modified Photocatalyst." Applied Mechanics and Materials 737 (March 2015): 561–64. http://dx.doi.org/10.4028/www.scientific.net/amm.737.561.

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The toluene being removed by dielectric barrier discharge (DBD) combined with modified photocatalyst was studied in the paper. Transition metal manganese was doped into crystal lattice of TiO2 in order to improve the activity of photocatalyst, and the optimal doping ratio was confirmed in the study. As one of main factors, the influence on toluene removal efficiency of gas flow rate, initial concentration and electric field intensity was analyzed in the study. Furthermore, the energy efficiency was another important index which had been compared amongγ-Al2O3, TiO2/γ-Al2O3 and Mn-TiO2/γ-Al2O3.
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17

Yao, Sun Hui, Yan Liang Su, and Wen Xian Kao. "Thermal Shock Performance of Al2O3/TiO2 Air Plasma Spray Coatings." Advanced Materials Research 328-330 (September 2011): 853–56. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.853.

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This study aimed to understand the effect of TiO2 content on the thermal shock performance of Al2O3/TiO2 air plasma spray coatings. Three kinds of commercial feedstock powders were used, i.e. Al2O3, Al2O3-13wt%TiO2 and Al2O3-40wt%TiO2. The resulting coatings were studied in terms of micro Vickers hardness test, XRD, SEM and thermal shock test. The last was conducted using a water quenching method. The results showed that both the coating hardness and thermal shock performance decreased with the TiO2 content.
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18

Nur Haslinda Mohamed Muzni, Ervina Efzan Mhd Noor, and Mohd Mustafa Al-Bakri Abdullah. "Influence of TiO2 and Al2O3 Nanoparticles Addition on Thermal, Wettability and IMC Growth of Sn-3.0Ag-0.5Cu Lead-Free Solder at Different Reflow Temperature." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 109, no. 1 (2023): 188–95. http://dx.doi.org/10.37934/arfmts.109.1.188195.

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This study investigated the influence of adding 0.50 wt% and 1.0 wt% titanium dioxide (TiO2) and aluminium oxide (Al2O3) nanoparticles on the properties of Sn3.0Ag0.5Cu (SAC305) lead-free solder alloy. In terms of thermal properties, SAC305 lead-free solder with or without addition of TiO2 and Al2O3 nanoparticles, the melting temperature is very similar and comparable. The wetting performance of the SAC305 nanocomposite solder was determined by the contact angle. The best contact angle recorded is 31.65° at reflow temperature of 250°C for 0.50 wt% addition of TiO2 and Al2O3 nanoparticles. The
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19

Ramos, Alfeu Saraiva, Marisa Aparecida de Souza, Roberto de Oliveira Magnago, Claudinei dos Santos, Camila Aparecida Araujo da Silva, and Bianca de Almeida Fortes. "Sintering of Al2O3-TiO2 Mixtures Obtained by High-Energy Ball Milling." Advances in Science and Technology 87 (October 2014): 157–61. http://dx.doi.org/10.4028/www.scientific.net/ast.87.157.

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In this work, the preparation of Al2O3-TiO2 ceramics by high-energy ball milling varying the molar fraction in 1:1 and 3:1 was investigated. The powder mixtures were processed in a planetary mill at 250rpm and a ball-to-powder weight ratio of 5:1, for 120min. Compacts were obtained by cold pressing at 100MPa. These specimens were heated at 1000◦C for 30min to promote the water evaporation, and subsequently sintered at 1500◦C for 240min. Samples were characterized by relative density and X-ray diffraction. Hardness and fracture toughness were determined by Vickers Indentation Method. The crysta
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20

Al-Hussein, Fatimah T., and Bahaa H. Rabee. "Optical Properties of (PS-TiO2-Al2O3) Nanocomposite Films Injected with Air Nano Bubbles." NeuroQuantology 20, no. 3 (2022): 01–07. http://dx.doi.org/10.14704/nq.2022.20.3.nq22032.

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In this work, the optical properties of (PS-TiO2-Al2O3) nanocomposites films prepared by casting method have studied. To use in different optical fields. The TiO2 and Al2O3 nano particles added with different weight percentages are (1,2, 3 and 4) wt% were injected air bubbles to generate Nano bubbles in the (PS-TiO2-Al2O3) nanocomposites. The results revealed that absorbance, absorption coefficient, extinction coefficient, and refractive index of the optical characteristics of nanocomposites for wavelength range (280-800) nm. Increase with increase TiO2 and Al2O3concentrations, while the Trans
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21

Hwang, Jae Yeon, Edoardo Magnone, Jeong In Lee, Xuelong Zhuang, Min Chang Shin, and Jung Hoon Park. "S- and N-Co-Doped TiO2-Coated Al2O3 Hollow Fiber Membrane for Photocatalytic Degradation of Gaseous Ammonia." Membranes 12, no. 11 (2022): 1101. http://dx.doi.org/10.3390/membranes12111101.

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This study successfully prepared and tested sulfur- and nitrogen-co-doped TiO2-coated α-Al2O3 (S,N-doped TiO2/Al2O3) hollow fiber (HF) membranes for efficient photocatalytic degradation of gaseous ammonia (NH3). Thiourea was used as a sulfur- and nitrogen-doping source to produce a S,N-doped TiO2 photocatalyst powder. For comparative purposes, undoped TiO2 powder was also synthesized. Through the application of a phase-inversion technique combined with high-temperature sintering, hollow fibers composed of α-Al2O3 were developed. Undoped TiO2 and S,N-doped TiO2 photocatalyst powders were coated
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22

Muhamad Zuhairi Sulaiman, Stephen Wong Teck Ching, Heng Zeng Hui, Azim Arshad, and Tomio Okawa. "Boiling Heat Transfer Coefficient of Hybrid Nanofluids with and without Surfactant." Journal of Advanced Research in Micro and Nano Engineering 27, no. 1 (2024): 31–41. https://doi.org/10.37934/armne.27.1.3141.

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Experiments were carried out to investigate the effect of surfactants on the boiling heat transfer coefficient of hybrid water-based nanofluids. In the present work, both Al2O3-SiO2 and Al2O3-TiO2 hybrid nanofluids were prepared with a 75:25 composition ratio and concentration of 0.01 v/v%, mixed with SDS surfactant of 40 ppm and prepared using ultrasonic process. It was found that Al2O3-SiO2 and Al2O3-TiO2 hybrid nanofluid enhance BHTC performance compared with distilled water, however, its performance will deteriorate gradually after 5 minutes of the experiment. Additional SDS in both Al2O3-
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23

Pacheco-Malagon, G., A. Garcia-Borquez, D. Coster, A. Sklyarov, S. Petit, and J. J. Fripiat. "TiO2-Al2O3 nanocomposites." Journal of Materials Research 10, no. 5 (1995): 1264–69. http://dx.doi.org/10.1557/jmr.1995.1264.

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Nanosized TiO2 is synthesized in a nanosized alumina matrix by a sol-gel procedure. The results of the study of the blueshift of the TiO2 UV band edge are compared to the information obtained from transmission electron microscopy (TEM). As long as the atomic ratio Ti/Al remains smaller than 17.5%, no individualized TiO2 particles are detected by TEM, in spite of the fact that no modification of the alumina structure occurs, as revealed by 27Al MAS NMR. The shift of the UV band edge suggests the growth of homogeneous TiO2 domains in the alumina matrix. Above a critical radius, on the order of 1
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24

Sabu, Kuzhunellil Raghavan Pillai, Kalur Vijayachandra C. Rao, and Chandrathil Govindan Ramachandran Nair. "A Comparative Study on the Acidic Properties and Catalytic Activities of TiO2, SiO2, Al2O3, SiO2–Al2O3, SiO2–TiO2, Al2O3–TiO2, and TiO2–SiO2–Al2O3." Bulletin of the Chemical Society of Japan 64, no. 6 (1991): 1920–25. http://dx.doi.org/10.1246/bcsj.64.1920.

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25

Yang, Shao Xia, Yu Jie Feng, Jiafeng Wan, Wanpeng Zhu та Zhanpeng Jiang. "Effect of TiO2 on the Property of RuO2/γ-Al2O3 Catalyst". Materials Science Forum 475-479 (січень 2005): 1141–44. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.1141.

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A catalyst, as a kind of function material, plays important roles. In the paper RuO2/g-Al2O3 and RuO2-TiO2/g-Al2O3 catalyst were prepared by the impregnation method. The structure o f two catalysts was studied with XRD, SEM and XPS. The addition of TiO2 promoted the dispersion of Ru particles, and made the amount of the chemisorbed oxygen increased on catalyst surface. The activity was investigated in WAO of phenol over RuO2/g-Al2O3 and RuO2-TiO2/g-Al2O3 catalysts. The results showed that two catalysts had good activity, and TiO2 effectively increased the activity of RuO2/g-Al2O3 catalyst in W
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26

Lee, Woo-Jae, Zhixin Wan, Da Young Kim, et al. "Corrosion Properties of Atomic Layer Deposited TiO2, Al2O3 and TiO2-Al2O3 Nanolaminated Film Coated 316L Stainless Steel." Journal of the Korean institute of surface engineering 50, no. 1 (2017): 35–41. http://dx.doi.org/10.5695/jkise.2017.50.1.35.

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27

Ilatovskaia, M., and O. Fabrichnaya. "Liquid Immiscibility and Thermodynamic Assessment of the Al2O3–TiO2–SiO2 System." Journal of Phase Equilibria and Diffusion 43, no. 1 (2022): 15–31. http://dx.doi.org/10.1007/s11669-021-00935-4.

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AbstractPhase equilibria in the TiO2–SiO2 system have been studied experimentally using DTA and SEM/EDX. The thermodynamic parameters for the TiO2–SiO2 system have been assessed considering new experimental data of the present work and from the literature. Moreover, the miscibility of the liquid in the Al2O3–TiO2–SiO2 system has been studied at 2013 K in air and shrinkage of the miscibility gap at 3.8 mol% Al2O3 has been demonstrated. The experimental data obtained in the present work and literature as well as the thermodynamic databases for the binary Al2O3–TiO2, TiO2–SiO2, and Al2O3–SiO2 sys
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28

Deng, Jian, Dong Xu Yao, Yong Feng Xia, Kai Hui Zuo, Han Qin Liang, and Yu Ping Zeng. "The Influence of Al2O3 and TiO2 Additions on the Sintering Behavior of Partial Reaction Bonding Silicon Nitride." Key Engineering Materials 697 (July 2016): 193–97. http://dx.doi.org/10.4028/www.scientific.net/kem.697.193.

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To compare the influence of Al2O3 and TiO2 on the sintering behavior of partial reaction bonding silicon nitride (RBSN) and post densification behavior, different amounts of Al2O3 or TiO2 have been added into Si-Si3N4-Y2O3 system. The results indicated that a high amount of Al2O3 addition inhibited the reaction bonding process, a lower nitridation degree was obtained, while TiO2 has limited influence on nitridation, only slightly decreased nitration degree with increasing TiO2 addition. After post sintered at 1800 °C, a density ranging from 2.31 to 3.09g/cm3 were obtained with additions of Al2
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29

Chou, Chung-Yi, Chien-Pin Huang, Neng-Chou Shang, and Yue-Hwa Yu. "Treatment of local scrubber wastewater for semiconductor by using photo-catalytic ozonation." Water Science and Technology 59, no. 11 (2009): 2281–86. http://dx.doi.org/10.2166/wst.2009.274.

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This study investigates the oxidation of local scrubber wastewater (LSW) from semiconductor manufacture by using ozonation, catalytic ozonation (ozone/Al2O3 and ozone/TiO2–Al2O3), and photo-catalytic ozonation (UV/TiO2–Al2O3, ozone/UV and ozone/UV/TiO2–Al2O3). The results show that catalyst Al2O3 and TiO2–Al2O3 promotes the TOC removal under the condition of neutral or alkaline buffer solution during catalytic ozonation of LSW. The Al2O3 induces highest promotion in TOC removal efficiency, which is higher than ozone alone by 26% TOC removal under alkaline buffer solution. However, TiO2–Al2O3 a
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30

Švagelj, Zrinka, Vilko Mandić, Lidija Ćurković, Martina Biošić, Irena Žmak, and Mattia Gaborardi. "Titania-Coated Alumina Foam Photocatalyst for Memantine Degradation Derived by Replica Method and Sol-Gel Reaction." Materials 13, no. 1 (2020): 227. http://dx.doi.org/10.3390/ma13010227.

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In the present work, alumina (Al2O3) foam was prepared by the replica method where a polyurethane (PU) foam (30 pores per inch (ppi)) template was impregnated with a 60 wt.% Al2O3 suspension. Sintered Al2O3 foam was used as substrate for the deposition of sol-gel derived titania (TiO2) film using dip coating. For the preparation of TiO2 sol, titanium(IV) isopropoxide (Ti-iPrOH) was used as the precursor. The common problem of qualification and quantification of a crystalline coating on a highly porous 3D substrate with an uneven surface was addressed using a combination of different structural
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Yang, Kuang Hsuan, and Chien Chon Chen. "Alumina Template Assistance in Titania Nanotubes Dye-Sensitized Solar Cell ( NT-DSSC) Device Fabrication." ISRN Nanotechnology 2012 (May 10, 2012): 1–10. http://dx.doi.org/10.5402/2012/132797.

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In our previous works, we have made alumina template films and used it for nanowire, nanowhisk, and nanosphere fabrication and molecular aggregation studies. In the present paper, we have combined Al2O3 template and titania (TiO2) NT fabrication processes to achieve an Al2O3/TiO2 NT dye-sensitized solar cell (DSSC) devices. The DSSC structure includes glass substrate, transparent conductive film of ITO, Pt particles serving as the counter electrode, Al2O3/TiO2 NT film, dye, and ITO serving as the working electrode, and the electrolyte is injected into the counter-working interface. Al2O3 templ
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Díaz, Carlos, Olga Cifuentes-Vaca, and María Luisa Valenzuela. "Matrix Effect of Properties of Au, ZnO and Eu2O3: Silica, Titania and Alumina Matrices." Micro 3, no. 3 (2023): 699–714. http://dx.doi.org/10.3390/micro3030049.

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The composites Au/SiO2, Au/TiO2, Au/Al2O3, ZnO/TiO2, ZnO/TiO2, ZnO/Al2O3 and Eu2O3/SiO2, Eu2O3/TiO2 and Eu2O3/Al2O3 were prepared using a solid-state method. The effect of the polymer precursors was investigated using two precursor polymers, Chitosan and Poly(styrene-co-4vinylpyridine), (PS-co-4-PVP) in the M/MxLy•Chitosan//M’xO’y as well as M/MxLy•PS-co-4-PVP//M’xO’y with M’xO’y = SiO2, TiO2 and Al2O3. The effects on the particle size and morphology were observed. The new composites were characterized using X-ray powder diffraction, SEM-EDS mapping and HRTEM analysis. The distribution of the
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Zhuang, Jun Ping, Xue Ping Li, and Ying Liu. "Conversion of Glucose to Levulinic Acid Using SO42-/TiO2-Al2O3-SnO2 Solid Acid Catalysts." Advanced Materials Research 550-553 (July 2012): 234–37. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.234.

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Biomass represents an abundant and relatively low cost carbon resource that can be utilized to produce platform chemicals such as levulinic acid. This study focused on the effect of SO42-/TiO2-Al2O3-SnO2solid acid catalyst on the catalytic performance in levulinic acid production from biomass-derived carbohydrates glucose. The SO42-/TiO2-Al2O3-SnO2solid acid catalyst showed a high catalytic activity for the selective conversion of glucose to levulinic acid. Experimental results showed that SO42-/TiO2-Al2O3-SnO2solid acid had markedly catalytic effects on the conversion of glucose to levulinic
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Grigaitienė, Viktorija, Liutauras Marcinauskas, Airingas Šuopys, Romualdas Kėželis, and Egidijus Griškonis. "Effect of TiO2 Content on the Corrosion and Thermal Resistance of Plasma-Sprayed Al2O3-TiO2 Coatings." Crystals 15, no. 5 (2025): 439. https://doi.org/10.3390/cryst15050439.

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Modern industrial systems and biomass-fired furnaces require surface treatments that can withstand aggressive chemical, thermal, and corrosive environments. This study investigates the corrosion and thermal resistance of plasma-sprayed Al2O3-TiO2 coatings produced using a DC air–hydrogen plasma spray process. Coatings of compositions of Al2O3, Al2O3-3 wt.% TiO2, Al2O3-13 wt.% TiO2, and Al2O3-40 wt.% TiO2 were deposited on steel substrates with a Ni/Cr bond layer by plasma spraying. The coatings were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS)
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35

Kurokawa, Yasuyoshi, Ryota Nezasa, Shinya Kato, Hisashi Miyazaki, Isao Takahashi, and Noritaka Usami. "Fabrication of silicon nanowire based solar cells using TiO2/Al2O3 stack thin films." MRS Advances 3, no. 25 (2018): 1419–26. http://dx.doi.org/10.1557/adv.2018.40.

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ABSTRACTTo improve conversion efficiency of silicon nanowire (SiNW) solar cells, it is very important to reduce the surface recombination rate on the surface of SiNWs, since SiNWs have a large surface area. We tried to cover SiNWs with aluminum oxide (Al2O3) and titanium oxide (TiO2) by atomic layer deposition (ALD), since Al2O3 grown by ALD provides an excellent level of surface passivation on silicon wafers and TiO2 has a higher refractive index than Al2O3, leading to the reduction of surface reflectance. The effective minority carrier lifetime in SiNW arrays embedded in a TiO2/Al2O3 stack l
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36

Muzni, Nur Haslinda Mohamed, Ervina Efzan Mhd Noor, Mohd Mustafa Al-Bakri Abdullah, and Canan Aksoy. "Effects of TiO2 and Al2O3 nanoparticles addition on the thermal properties and wettability of Sn-3.0Ag-0.5Cu-xTiO2-xAl2O3." Journal of Physics: Conference Series 2169, no. 1 (2022): 012003. http://dx.doi.org/10.1088/1742-6596/2169/1/012003.

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Abstract This study investigated the effects of adding titanium dioxide (TiO2) and aluminium oxide (Al2O3) nanoparticles into Sn3.0Ag0.5Cu (SAC) lead-free solder alloy on the thermal properties and wettability. In comparison with SAC lead-free solder without addition of nanoparticles, the melting temperature is very similar and comparable. The solidus temperature is in the range of 217.1 to 217.2 °C with the addition of TiO2 and Al2O3 nanoparticles. The results shows that the addition of 0.25-1.0 wt% of TiO2 and Al2O3 nanoparticles caused the liquidus temperature to decrease from 222.4 to 220.
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Li, Jin Hong, Xiu Wen Wu, and Jing Yang. "Encapsulated Titanium Oxide with Al2O3 and its Ultraviolet Shielding Properties." Key Engineering Materials 373-374 (March 2008): 706–9. http://dx.doi.org/10.4028/www.scientific.net/kem.373-374.706.

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In this work, we encapsulated the titanium oxide particles with a layer of Al2O3 by a sol-gel process and investigated the UV-shielding properties of the obtained Al2O3-TiO2 composites. In this method, Al(NO3)3 aqueous solution mixed with raw titanium oxide powder was hydrolyzed by adding NH3·H2O. The hydrated materials were calcined at 500°C and then the composite of Al2O3-TiO2 was prepared. Different techniques including ICP-AES, XRD, SEM-EDS, and TEM were used to characterize the raw TiO2 and encapsulated TiO2 particles. Chemical analysis showed that TiO2 mass content in the raw titanium ox
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38

Nag, Abanti, Venu KS, and Hema Singh. "Enhancement of Microwave Absorption Properties of Hexaferrite/Epoxy Composites on the Addition of Non-magnetic Oxides." Journal of Materials and Applications 12, no. 1 (2023): 1–10. http://dx.doi.org/10.32732/jma.2023.12.1.1.

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The effect of non-magnetic oxides such as Al2O3, TiO2 and ZnO on the microwave absorption properties of magnetoplumbite barium hexaferrite (BaFe11.8Co0.2O19) is analyzed. Barium hexaferrite nanoparticles are synthesized through the sol-gel auto-combustion method. BaFe11.8Co0.2O19-Al2O3, BaFe11.8Co0.2O19-TiO2 and BaFe11.8Co0.2O19-ZnO composites are synthesized in a 1:1 ratio through mechanical mixing and heat treatment. The epoxy composites are fabricated with 50% loading of BaFe11.8Co0.2O19-Al2O3, BaFe11.8Co0.2O19-TiO2 and BaFe11.8Co0.2O19-ZnO in epoxy matrix followed by room temperature curin
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39

SABU, K. R. P., K. V. C. RAO, and C. G. R. NAIR. "ChemInform Abstract: A Comparative Study on the Acidic Properties and Catalytic Activities of TiO2, SiO2, Al2O3, SiO2-Al2O3, SiO2-TiO2, Al2O3-TiO2, and TiO2-SiO2- Al2O3." ChemInform 22, no. 38 (2010): no. http://dx.doi.org/10.1002/chin.199138026.

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40

Ahmed, Dalya Jasim Ahmed, Basim Ibrahim Al-abdaly, and Sattar Jalil Hussein. "Synthesis and Characterization of High Surface Area Nano Titanium Dioxide." Journal of Petroleum Research and Studies 11, no. 4 (2021): 51–75. http://dx.doi.org/10.52716/jprs.v11i4.563.

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TiO2 and TiO2-Al2O3 nanoparticles were synthesized via sol-gel method using hydrolysis of Titanium tetraisopropoxide (TTIP) with ethanol and water mixture as titania source. TiO2-Al2O3 Nano-composite was successfully synthesized using the sol-gel technique. Tetraisopropoxide and aluminium isopropoxide were used to prepare TiO2-Al2O3. All prepared samples calcination were conducted at different temperature (400 to 700) oC. The synthesized TiO2 and TiO2-Al2O3 nanocomposites were then characterized by XRD, AFM, BET surface area, SEM, XRF. XRD, the analysis showed that the presence of alumina (Al2
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41

Fang, Jinle, Zhuogang Pang, Xiangdong Xing, and Runsheng Xu. "Thermodynamic Properties, Viscosity, and Structure of CaO–SiO2–MgO–Al2O3–TiO2–Based Slag." Materials 14, no. 1 (2020): 124. http://dx.doi.org/10.3390/ma14010124.

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The effect of TiO2 and the MgO/Al2O3 ratio on the viscosity, heat capacity, and enthalpy change of CaO–SiO2–Al2O3–MgO–TiO2 slag at constant heat input was studied. The variation of slag structure was analyzed by the calculation of activation energy and FTIR spectrum measurements. The results showed that the heat capacity and enthalpy change of the slag decreased with the increase of TiO2 content. Under constant heat supply, the fluctuations in slag temperature were relatively apparent, and the temperature of slag increased as the TiO2 content increased. The viscosity of slag decreased due to t
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42

Nik Yusoff, Nik Raihan, Aisyah Zahirah Roslee, Rozidaini Mohd Ghazi, Musfiroh Jani, and Nik Nurul Anis Nik Yusoff. "Photocatalytic degradation of glyphosate using TiO2/Al2O3/CNT." BIO Web of Conferences 73 (2023): 05025. http://dx.doi.org/10.1051/bioconf/20237305025.

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Excessive use of glyphosate in agriculture has a negative impact on the environment because it causes runoff, which affects water sources and causes pollution. Advanced Oxidation Process (AOP) is the method for resolving water contamination concerns, and photocatalytic degradation using TiO2/Al2O3/CNT nanocomposites has been observed to be a reliable solution for degrading glyphosate. The photocatalyst of TiO2/Al2O3/CNT nanocomposite was prepared using various ratios which were 70:20:10, 70:29:1 and 70:30:0. These photocatalysts TiO2/Al2O3/CNT were prepared using hydrothermal process. The prep
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43

Visbal, Santiago, Joaquín Lira-Olivares, Tohru Sekino, Koichi Niihara, Byung Kyu Moon, and Soo Wohn Lee. "Mechanical Properties of Al2O3-TiO2-SiC Nanocomposites for the Femoral Head of Hip Joint Replacement." Materials Science Forum 486-487 (June 2005): 197–200. http://dx.doi.org/10.4028/www.scientific.net/msf.486-487.197.

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Microstructure and mechanical properties of Al2O3-TiO2-SiC nanocomposites were studied. To improve the mechanical and tribological properties of alumina, nano-sized TiO2 and SiC powders were dispersed. Spark Plasma Sintering (SPS) technique, at 1400°C, 50 MPa for 5 minutes, was applied for the densification of Al2O3-TiO2-SiC nanocomposites. Characterization of Al2O3- TiO2-SiC nanocomposites was carried out using Scanning Electron Microscopy (SEM), Transmission Electron Microscope (TEM), X-ray diffractometer and EDX. Fracture toughness and Vickers hardness were estimated by indentation techniqu
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44

Ishikawa, Yoshie, Yasunori Hayashi, and Yasumichi Matsumoto. "Preparation of titanium(IV) oxide film on a hard alumite substrate." Journal of Materials Research 17, no. 9 (2002): 2373–78. http://dx.doi.org/10.1557/jmr.2002.0347.

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TiO2 was deposited onto hard alumite (Al/Al2O3/TiO2) by alternating current electrolysis and precipitation in (NH4)2[TiO(C2O4)2] solution at various temperatures, where the hard alumite was prepared by the anodic oxidation of aluminum in sulfuric acid (Al/Al2O3). The TiO2 electrodeposition mainly occurred at temperatures lower than about 50 °C, while the TiO2 deposition due to TiO(C2O4)22− adsorption onto alumina predominantly occurred at temperatures higher than about 50 °C. The amount of deposited TiO2 increased with the increase in the deposition temperature, leading to high photocatalytic
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45

Zhang, Kanghui, Yanling Zhang, and Tuo Wu. "Distribution Ratio of Sulfur between CaO-SiO2-Al2O3-Na2O-TiO2 Slag and Carbon-Saturated Iron." Metals 8, no. 12 (2018): 1068. http://dx.doi.org/10.3390/met8121068.

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To explore the feasibility of hot metal desulfurization using red mud, the sulfur distribution ratio (LS) between CaO-SiO2-Al2O3-Na2O-TiO2 slag and carbon-saturated iron is evaluated in this paper. First, the theoretical liquid areas of the CaO-SiO2-Al2O3 (-Na2O-TiO2) slag are discussed and the fluxing effects of Al2O3, Na2O, and TiO2 are confirmed. Then, LS is measured via slag-metal equilibrium experiments. The experimental results show that LS significantly increases with the increase of temperature, basicity, and Na2O content, whereas it decreases with the increase of Al2O3 and TiO2 conten
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Thirumavalavan, P., Venckatesh Rajendran, and Rajeshwari Sivaraj. "Synthesis, Characterization of SiO2/TiO2 and SiO2/Al2O3 Nano-Composites for the Photo-Degradation of Acid Brown- 43 dye with Irradiation of Solar Light." Oriental Journal of Chemistry 34, no. 5 (2018): 2637–42. http://dx.doi.org/10.13005/ojc/340555.

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In this study we have found that photo degradation of Acid brown- 43 dye with irradiation Solar light Using synthesized SiO2/ TiO2 and SiO2/Al2O3 Nano-composites which prepared by chemical precipitation technique using microwave irradiation. The structure and morphology of SiO2/TiO2 and SiO2/Al2O3) Nano composites were characterized by SEM, EDAX & TEM analysis. The similarities in photo degradation mechanism, SiO2 , Al2O3 and TiO2 have as good as band gap energy, and possess worthy standing as photo-catalysts. SiO2/TiO2 and SiO2/Al2O3 nanoparticles have large surface area and thus provide
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47

Benedict, F., Amit Kumar, K. Kadirgama, et al. "Thermal Performance of Hybrid-Inspired Coolant for Radiator Application." Nanomaterials 10, no. 6 (2020): 1100. http://dx.doi.org/10.3390/nano10061100.

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Due to the increasing demand in industrial application, nanofluids have attracted the considerable attention of researchers in recent decades. The addition of nanocellulose (CNC) with water (W) and ethylene glycol (EG) to a coolant for a radiator application exhibits beneficial properties to improve the efficiency of the radiator. The focus of the present work was to investigate the performance of mono or hybrid metal oxide such as Al2O3 and TiO2 with or without plant base-extracted CNC with varying concentrations as a better heat transfer nanofluid in comparison to distilled water as a radiat
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48

Journal, Baghdad Science. "The Effect of nano particles of TiO2-Al2O3 on the Mechanical properties of epoxy Hybrid nanocomposites." Baghdad Science Journal 12, no. 3 (2015): 597–602. http://dx.doi.org/10.21123/bsj.12.3.597-602.

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Preparation of epoxy/ TiO2 and epoxy/ Al2O3 nanocomposites is studed and investigated in this paper. The nano composites are processed by different nano fillers concentrations (0, 0.01, 0.02 ,0.03, 0.04 ,0.05 ,0.07 and 0.1 wt%). The particles sized of TiO2,Al2O3 are about 20–50 nm.Epoxy resin and nano composites containing different shape nano fillers of (TiO2:Al2O3 composites),are shear mixing with ratio 1 to 1,with different nano hybrid fillers concentrations( 0.025 ,0.0 5 ,0.15 ,0.2, and 0.25 wt%) to Preparation of epoxy/ TiO2- Al2O3 hybrid composites. The mechanical properties of nanocompo
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49

Al-Rawi, Khalid R., and Sarah Kh Taha. "The Effect of nano particles of TiO2-Al2O3 on the Mechanical properties of epoxy Hybrid nanocomposites." Baghdad Science Journal 12, no. 3 (2015): 597–602. http://dx.doi.org/10.21123/bsj.2015.12.3.597-602.

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Preparation of epoxy/ TiO2 and epoxy/ Al2O3 nanocomposites is studed and investigated in this paper. The nano composites are processed by different nano fillers concentrations (0, 0.01, 0.02 ,0.03, 0.04 ,0.05 ,0.07 and 0.1 wt%). The particles sized of TiO2,Al2O3 are about 20–50 nm.Epoxy resin and nano composites containing different shape nano fillers of (TiO2:Al2O3 composites),are shear mixing with ratio 1 to 1,with different nano hybrid fillers concentrations( 0.025 ,0.0 5 ,0.15 ,0.2, and 0.25 wt%) to Preparation of epoxy/ TiO2- Al2O3 hybrid composites. The mechanical properties of nanocompo
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50

Feng, Dandan, Xiaojing Wang, Shike Zhao, Baipeng Song, and Guanjun Zhang. "Study of TiO2 on the Voltage Holdoff Capacity of Cr/Mn-Doped Al2O3 Ceramic in Vacuum." Materials 16, no. 14 (2023): 5048. http://dx.doi.org/10.3390/ma16145048.

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With the development of vacuum electronic devices toward high power, high frequency, and miniaturization, the voltage holdoff capacity of the insulation materials in devices has also been raised to a higher demand. Cr/Mn/Ti-doped Al2O3 ceramics were prepared, and the bulk density, micromorphology, phase composition, resistivity, secondary electron emission coefficient, and surface flashover threshold in the vacuum of the Al2O3 were characterized. The results show that the addition of TiO2 to the Al2O3 ceramic can promote the sintering of the ceramic. The Cr/Mn/Ti-doped Al2O3 ceramic with a hom
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