【摘要】 研究了利用BaCO3 、B4C粉和活性炭粉制备BaB6陶瓷粉末的反应合成工艺。利用X -射线衍射分析了不同反应温度和保温时间条件下所生成粉末的相组成 ,利用扫描电镜分析了所生成BaB6粉末的颗粒尺寸及形貌。实验结果表明 ,BaCO3 -B4C -C系制备BaB6粉末是一固相反应过程 ,其间要经过Ba2 B2 O5、BaB2 O4等过渡相的生成过程。反应合成BaB6粉末的优化工艺为 :在 10 -2 Pa的真空条件下 ,1673K保温 2小时。所合成的BaB6粉末形状主要由原材料B4C粉的形状决定 ,其颗粒由多边形集合体构成 ,通过改善原材料颗粒形貌可优化BaB6粉末形貌及性能。更多还原

【Abstract】 The reaction synthesis of BaB 6 ceramic powder was studied systematically in this paper.X-ray diffraction and scanning electron microscopy analysis show that interaction in the BaCO 3-B 4C-C system intended to barium hexaboride formation belongs to solid phase processes and passes through the stages of transition phases Ba 2B 2O 5?BaB 2O 4 formation etc.The optimal technology of barium hexaboride synthesis is holding time of 2h at 1673K under 10 -2 Pa vacuums.The shape of B 4C powder decide that of BaB 6,and the properties and shape of BaB 6 powder can be improved by choosing good raw materials.更多还原