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.
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收藏
页码：940 / 948
页数：9
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