氧化钨氢还原过程中的物相转变

来源期刊：中南大学学报(自然科学版)1995年第5期

论文作者：陈绍衣 钱崇梁

文章页码：605 - 609

关键词：氧化钨; 分解; 氢还原; X射线衍射分析

Key words：tungsten oxide; decomposition; hydrogen reduction; X-ray difraction analysis

摘    要：仲钨酸铵(APT)在不同温度与不同气氛下热分解和(或)氢还原制得了4种典型的氧化钨,采用X射线衍射分析研究了这些氧化钨在氢还原过程中的物相转变,试验结果表明：APT的分解条件和氧化钨的氢还原工艺对钨粉生产都是很重要的.本文为氧化钨和钨粉生产厂提供了某些图谱、数据和推论;特别是用干燥氢还原W₁₈O₄₉直接生成β－W和α－W可避免中间的WO₂形成,这一新发现,对高效生产细钨粉有重要意义。

Abstract: Four typical forms of tungsten oxide have been obtained from APT by thermal decompo-sition and /or hydrogen reduction at different temperatures and in various atmospheres. Thephase transformation during hydrogen reduction of such tungsten oxides has been investigat-ed by using X-ray difraction analysis.The experimental results show that the decompositionconditions of APT and the hydrogen reduction process are essential to the production of thetungsten powder. This paper provides the manufacturers of turgsten oxides and tungstenpowder with patterns, data as well as the consequences. Especially the direct formation of β-W and α-W by the reduction of W₁₈W₄₉ with dry hydrogen can avoid the formation of interme-diate WO₂. This newly found fact is of great value to the high-efficient production of finetungsten powder.