Preparation of Molybdenum-Tungsten Alloy Powders via Magnesium and Calcium Vapor Reduction of Oxide Compounds

被引：0

作者：

Kolosov, V. N. ^{[1
]}

Miroshnichenko, M. N. ^{[1
]}

Prokhorova, T. Yu. ^{[1
]}

机构：

[1] Russian Acad Sci, Tananaev Inst Chem, Fed Res Ctr, Kola Sci Ctr, Apatity 184209, Murmansk Oblast, Russia

来源：

INORGANIC MATERIALS | 2023年 / 59卷 / 09期

关键词：

powder; alloy; reduction; specific surface area; porosity; SELECTIVE HYDRODEOXYGENATION; GUAIACOL; BEHAVIOR;

D O I：

10.1134/S0020168523090078

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the preparation of molybdenum-tungsten alloy powders via magnesium and calcium vapor reduction of the Mo0.3W0.7O3, Mg\Mo0.7W0.3O4, and Ca\Mo0.7W0.3O4 compounds in the temperature range 750-880 degrees C at residual pressures in the reactor from 5 to 15 kPa. The specific surface area of the Mo-W alloy powders prepared by reducing Mo0.3W0.7O3 slightly exceeds that of the mixture of metal powders obtained by reducing a mixture of WO3 and MoO3 under similar conditions. The specific surface area of the Mo-W alloy powders prepared via magnesium vapor reduction of the Ca\Mo0.7W0.3O4 and Mg\Mo0.7W0.3O4 compounds exceeds that in the case of calcium vapor reduction. We have obtained molybdenum-tungsten alloy powders having lattice parameters of 0.3153 +/- 0.0001 and 0.3160 +/- 0.0001 nm and ranging in specific surface area from 9 to 22 m(2)/g. The average crystallite size of the alloys, evaluated using the Scherrer formula, lies in the range 12-35 nm. The powders have a mesoporous structure.

引用

页码：940 / 948

页数：9

共 42 条

[31] Preparation of vanadium powders by calcium vapor reduction of V2O3 under vacuum
Wang, Fengkang
Xu, Baoqiang
Wan, Heli
Yang, Jia
Yang, Bin
Jiang, Wenlong
VACUUM, 2020, 173 (173)
[32] Magnesium Vapor Reduction of Tantalum Oxide Compounds in the Temperature Range 540-680°C
Orlov, V. M.
Kiselev, E. N.
INORGANIC MATERIALS, 2022, 58 (08) : 799 - 805
[33] PROCESSES TO PRODUCE TI-AL ALLOY POWDERS BY CALCIUM CO-REDUCTION FROM THE OXIDE
SUZUKI, RO
SAKAMOTO, H
OISHI, T
ONO, K
MEMOIRES ET ETUDES SCIENTIFIQUES DE LA REVUE DE METALLURGIE, 1989, 86 (10): : 655 - 658
[34] Thermodynamic Modelling of Magnesium-Oxide, Calcium-Oxide and Strontium-Oxide Reduction Systems via Pidgeon Process
Bugdayci, M.
Tasyurek, K. C.
Yucel, Onuralp
9TH INTERNATIONAL SYMPOSIUM ON HIGH-TEMPERATURE METALLURGICAL PROCESSING, 2018, : 81 - 89
[35] PROCESSES OCCURRING DURING REDUCTION AND ALLOY FORMATION IN THE MoO3-WO3-H2 SYSTEM. II. LOW-TEMPERATURE ALLOY FORMATION IN THE MOLYBDENUM-TUNGSTEN SYSTEM.
Savyak, M.P.
Uvarova, I.V.
Konchakovskaya, L.D.
Skorokhod, V.V.
Soviet powder metallurgy and metal ceramics, 1985, 24 (12): : 879 - 882
[36] Kinetic study on preparation of substoichiometric tungsten oxide WO2.72 via hydrogen reduction process
Dan Qiao
Yue Wang
Fan Li
Daya Wang
Baijun Yan
Journal of Thermal Analysis and Calorimetry, 2019, 137 : 389 - 397
[37] Kinetic study on preparation of substoichiometric tungsten oxide WO2.72 via hydrogen reduction process
Qiao, Dan
Wang, Yue
Li, Fan
Wang, Daya
Yan, Baijun
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2019, 137 (02) : 389 - 397
[38] Preparation of Ultrafine W Powder via Carbothermic Prereduction of Tungsten Oxide Followed by Deep Reduction with Hydrogen
Cheng-Min Song
Guo-Hua Zhang
Kuo-Chih Chou
Baijun Yan
JOM, 2020, 72 : 379 - 384
[39] Preparation of Ultrafine W Powder via Carbothermic Prereduction of Tungsten Oxide Followed by Deep Reduction with Hydrogen
Song, Cheng-Min
Zhang, Guo-Hua
Chou, Kuo-Chih
Yan, Baijun
JOM, 2020, 72 (01) : 379 - 384
[40] Reduction mechanism of surface oxide in aluminum alloy powders containing magnesium studied by x-ray photoelectron spectroscopy using synchrotron radiation
Kimura, A
Shibata, M
Kondoh, K
Takeda, Y
Katayama, M
Kanie, T
Takada, H
APPLIED PHYSICS LETTERS, 1997, 70 (26) : 3615 - 3617

← 1 2 3 4 5 →