V. N. Kolosov, M. N. Miroshnichenko, T. Yu. Prokhorova
{"title":"通过氧化化合物的镁和钙气相还原制备钼钨合金粉末","authors":"V. N. Kolosov, M. N. Miroshnichenko, T. Yu. Prokhorova","doi":"10.1134/S0020168523090078","DOIUrl":null,"url":null,"abstract":"<p>We report the preparation of molybdenum–tungsten alloy powders via magnesium and calcium vapor reduction of the Mo<sub>0.3</sub>W<sub>0.7</sub>O<sub>3</sub>, MgМо<sub>0.7</sub>W<sub>0.3</sub>O<sub>4</sub>, and CaМо<sub>0.7</sub>W<sub>0.3</sub>O<sub>4</sub> compounds in the temperature range 750–880°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 Mo<sub>0.3</sub>W<sub>0.7</sub>O<sub>3</sub> slightly exceeds that of the mixture of metal powders obtained by reducing a mixture of WO<sub>3</sub> and MoO<sub>3</sub> under similar conditions. The specific surface area of the Mo–W alloy powders prepared via magnesium vapor reduction of the CaМо<sub>0.7</sub>W<sub>0.3</sub>O<sub>4</sub> and MgМо<sub>0.7</sub>W<sub>0.3</sub>O<sub>4</sub> 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<sup>2</sup>/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.</p>","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"59 9","pages":"940 - 948"},"PeriodicalIF":0.9000,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Preparation of Molybdenum–Tungsten Alloy Powders via Magnesium and Calcium Vapor Reduction of Oxide Compounds\",\"authors\":\"V. N. Kolosov, M. N. Miroshnichenko, T. Yu. Prokhorova\",\"doi\":\"10.1134/S0020168523090078\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>We report the preparation of molybdenum–tungsten alloy powders via magnesium and calcium vapor reduction of the Mo<sub>0.3</sub>W<sub>0.7</sub>O<sub>3</sub>, MgМо<sub>0.7</sub>W<sub>0.3</sub>O<sub>4</sub>, and CaМо<sub>0.7</sub>W<sub>0.3</sub>O<sub>4</sub> compounds in the temperature range 750–880°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 Mo<sub>0.3</sub>W<sub>0.7</sub>O<sub>3</sub> slightly exceeds that of the mixture of metal powders obtained by reducing a mixture of WO<sub>3</sub> and MoO<sub>3</sub> under similar conditions. The specific surface area of the Mo–W alloy powders prepared via magnesium vapor reduction of the CaМо<sub>0.7</sub>W<sub>0.3</sub>O<sub>4</sub> and MgМо<sub>0.7</sub>W<sub>0.3</sub>O<sub>4</sub> 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<sup>2</sup>/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.</p>\",\"PeriodicalId\":585,\"journal\":{\"name\":\"Inorganic Materials\",\"volume\":\"59 9\",\"pages\":\"940 - 948\"},\"PeriodicalIF\":0.9000,\"publicationDate\":\"2024-03-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Inorganic Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S0020168523090078\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Inorganic Materials","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1134/S0020168523090078","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Preparation of Molybdenum–Tungsten Alloy Powders via Magnesium and Calcium Vapor Reduction of Oxide Compounds
We report the preparation of molybdenum–tungsten alloy powders via magnesium and calcium vapor reduction of the Mo0.3W0.7O3, MgМо0.7W0.3O4, and CaМо0.7W0.3O4 compounds in the temperature range 750–880°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 CaМо0.7W0.3O4 and MgМо0.7W0.3O4 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 m2/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.
期刊介绍:
Inorganic Materials is a journal that publishes reviews and original articles devoted to chemistry, physics, and applications of various inorganic materials including high-purity substances and materials. The journal discusses phase equilibria, including P–T–X diagrams, and the fundamentals of inorganic materials science, which determines preparatory conditions for compounds of various compositions with specified deviations from stoichiometry. Inorganic Materials is a multidisciplinary journal covering all classes of inorganic materials. The journal welcomes manuscripts from all countries in the English or Russian language.