液—固混料法制取钨—稀土氧化物包覆粉的研究

Study of Tungsten Composite Powder with Rare-earth Oxide Produced by Liquid-Solid Blending Method

摘要:

进行了以氧化钨为原料，稀土氧化物为掺杂相，用液－固混料法将掺杂与氧化钨混合，再经过盐类分解，氧化钨还原等工艺，制取不同掺杂相和掺杂量的钨－稀土氧化物包覆粉的研究，着重探讨了原料类型，还原温度及掺杂相对还原程度的影响。结果表明，以ＷＯ２．９为原料的包覆粉，综合性能好；随还原温度升高，粉末还原程度提高，掺杂相含量高的比含量低的难还原，三元系粉末比二元系粉末难还原，用液－固法制备钨－稀土氧化物包覆粉，其

Abstract:

The tungsten composite powder with rare-earth oxide, in which the component and amount of doped phase are different, has been studied by the liquid-solid blending method, pyrolysis and reduction etc The effects of original powder on reduction temperature and the doped phase on the degree of reduction are discussed It has been showed that the composite powder made by WO 2 9 has good overall characters The reducing degree of the powder is enhanced with the temperatnre increasing The powder with a large amount of the doped phase is more difficult to reduce than that of a small amount of the doped phase The powder of ternary system is also more difficult to reduce than that of binary system The tungsten composite powder with rare-earth oxide made by the liquid-solid blending method has fine size and uniform disperse phase