硅酸盐学报2001，Vol.29Issue(2)：128-131,4.
硼热还原法制备LaB6粉末
FABRICATION PROCESS OF LaB6 POWDER BY BOROTHERMIC REDUCTION METHOD
摘要
Abstract
The synthesis of LaB6 powder by borothermic reduction method from the La2O3 - B system was investigated systematically in the present study. Thermodynamic analysis showed that the partial pressure of resultant gases played an important role during the formation of LaB6 powder, and that the synthetic temperature decreased notably by reducing the partial pressure. The synthetic conditions were determined combining the resulting of DTA analysis. The phase compositions of the products at different temperatures for different holding times were analyzed by X - ray diffraction, and the powder morphology and purity were examined by scanning electronic microscope and chemistry analysis separately. It is pointed out that the optimal conditions to fabricate LaB6 powder from the La2O3- B system are a holding time of 6 h at 1 923 K under 1Torr pressure, and that LaB6 powders are obtained with purity of 99.2 % and regular shape in average diameter of 6μm.关键词
硼热还原法/硼化镧/粉末/制备工艺分类
化学化工引用本文复制引用
郑树起,闵光辉,邹增大,于化顺,张川江..硼热还原法制备LaB6粉末[J].硅酸盐学报,2001,29(2):128-131,4.基金项目
家科技部科技型中小企业创新基金资助项目(19993703021411)，山东省科委国际合作基金资助项目(970008)及高新技术基金资助项目(GXB991). （19993703021411）
