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中南大学学报(自然科学版)

Journal of Central South University

第16卷    第2期    总第44期    1985年6月

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不同形态的钨氧化物氢还原过程的研究
吴恩熙1,邹志强1,谭爱纯1,钱崇梁1

(1.粉末冶金研究所)

摘 要: 本文对相成份为铵钨青铜、W20O58的蓝钨和黄钨在不同的温度下进行了氢还原试验。实验结果指出,通过蓝钨氢还原可获得比表面较大、粒度较小的钨粉,而采用相成份为铵钨青铜的蓝钨其效果较其他氧化物好。采用高温X射线衍射法对这几种钨氧化物逐步升温至800℃氢还原动态相变过程和各种温度下的还原动力学进行了研究。发现各种蓝钨相变过程相似,而与黄钨相变过程有明显的差异;低温还原时,各种蓝钨的还原活性均比黄钨,高温还原时,蓝钨与黄钨的还原活性相近。

 

关键字: 钨氧化物; 相变过程; 相成份; 蓝钨; 氢还原; 还原过程; 比表面; 还原活性; 动力学过程; 细钨粉

A STUDY ON H2-REDUCTION OF W-OXIDES IN DIFFERENT STATE
吴恩熙1,邹志强1,谭爱纯1,钱崇梁1

1.粉末冶金研究所

Abstract:An investigation on H2-reduction of TBO based on ATB. W20O58 as well as WO3 at different T has been performed. The experiment result ndieates that a finer reduced W-powder with larger BET-S can be obtained by TBO H2—reduction, and that it is better to use the TBO oased on ATB than to use other oxides. By means of in-situ high temperature X-ray diffraction analysis, he phase transfromation by increasing T step by step up to 800° and he dynamics at different T of ATB, W20O58 and WO3 during H2-reduction re also studied. It is found that the phase transformation of different BO was similar to each other, while it was obviously different ompared with that of WO3. At low T. the reduction activity of TBO s higher than that of WO3 The activity difference decreased with the ncrease of reduction T.

 

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中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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