Chemical Processes in Al2O3-Mo and Al2O3-W systems in a weakly reducing atmosphere

被引：6
|
作者：
Fedorov, V. A. [1 ]
Kostomarov, D. V. [1 ]
Antonov, E. V. [1 ]
机构：
[1] Russian Acad Sci, AV Shubnikov Crystallog Inst, Moscow 119333, Russia
来源：
CRYSTALLOGRAPHY REPORTS | 2014年 / 59卷 / 01期
关键词：
Aluminum oxide;
D O I：
10.1134/S1063774513060102
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Al2O3-Mo and Al2O3-W systems in a controlled Ar(95%) + H-2(5%) atmosphere at T = 2400 K and P = 1 bar have been calculated by the Monte Carlo method. It is established that the presence of hydrogen in these systems leads to the occurrence of OH, H2O2, HO2, H2O, AlOH, AlOOH, AlH, AlH2, and AlH3 components in the gas phase; aluminum hydrides are formed only through the interaction of hydrogen with melt evaporation products. The presence of reducing medium leads to a decrease in the free oxygen concentration by one to two orders of magnitude, which is expected to improve the quality of sapphire crystals.
引用
收藏
页码：132 / 136
页数：5
相关论文
共 50 条
  • [31] The corrosion behavior of Al2O3-SiO2 refractory in reducing atmosphere
    Wang, Yifei
    Zhang, Jianliang
    Wang, Cui
    He, Dongfeng
    Qin, Hongbin
    Li, Hongxia
    CERAMICS INTERNATIONAL, 2024, 50 (23) : 51550 - 51559
  • [32] Study on mechanism of SiO2 on Al2O3-Al-C material at reducing atmosphere
    Luan, Jian
    Wang, Chun-Yan
    Yang, Hong
    Sun, Jia-Lin
    Rengong Jingti Xuebao/Journal of Synthetic Crystals, 2013, 42 (05): : 986 - 980
  • [33] Mechanisms of hydrodenitrogenation of alkylamines and hydrodesulfurization of alkanethiols on NiMo/Al2O3, CoMo/Al2O3, and Mo/Al2O3
    Zhao, Y
    Prins, R
    JOURNAL OF CATALYSIS, 2005, 229 (01) : 213 - 226
  • [34] Ni/Al2O3-MO在裂解汽油加氢反应中的应用
    唐博合金
    徐菁利
    孙彦刚
    精细石油化工, 2007, (05) : 16 - 20
  • [35] Surface and catalytic properties of Al2O3, CuO/Al2O3 and ZnO/Al2O3 systems
    El-Nabarawy, Th.
    Attia, A.A.
    Hassan, N.A.
    Youssef, A.M.
    Adsorption Science and Technology, 1995, 12 (02):
  • [36] A Comparison Study on Wear Behaviors of Mo and Al2O3-Mo Coatings from RT to 300 degrees C
    Yan, Jianhui
    Guo, Yuanjun
    Wang, Yi
    Zhou, Peng
    Qiu, Jingwen
    LUBRICANTS, 2018, 6 (02)
  • [37] THE K2O.AL2O3-AL2O3 SYSTEM
    MOYA, JS
    CRIADO, E
    DEAZA, S
    JOURNAL OF MATERIALS SCIENCE, 1982, 17 (08) : 2213 - 2217
  • [38] Chemical processes in the Mo-W-Al2O3 system in vacuum (1 x 10-5 bar)
    Kostomarov, D. V.
    Bagdasarov, Kh. S.
    Antonov, E. V.
    CRYSTALLOGRAPHY REPORTS, 2012, 57 (04) : 595 - 602
  • [39] STUDIES IN LITHIUM OXIDE SYSTEMS .2. LI2O.AL2O3-AL2O3
    HUMMEL, FA
    SASTRY, BSR
    WOTRING, D
    JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1958, 41 (03) : 88 - 92
  • [40] SPUTTER-DEPOSITED AL2O3-MO-AL2O3 SELECTIVE ABSORBER COATINGS
    THORNTON, JA
    PENFOLD, AS
    LAMB, JL
    THIN SOLID FILMS, 1980, 72 (01) : 101 - 109
12345