CaB_6的反应合成  

Reaction Synthesis of CaB_6 Powder

作　　者：郑树起[1] 韩建德[1] 闵光辉[1] 邹增大[1] 杨丽霞[1] 王维倜[1] 

机构地区：[1]山东大学材料科学与工程学院,济南250061

出　　处：《粉末冶金技术》2001年第5期259-261,共3页Powder Metallurgy Technology

基　　金：山东省优秀中青年科学家奖励基金;山东省科技厅高新技术基金资助项目 (GXB991)

摘　　要：研究了利用CaCO3、B4 C粉和活性炭粉制备CaB6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CaB6粉末的颗粒尺寸及形貌。实验结果表明 ,CaCO3 B4 C C系制备CaB6粉末是一固相反应过程 ,其间要经过Ca3B2 O6、CaB2 C2 等过渡相的生成过程。反应合成CaB6粉末的优化工艺是在 10 -2 Pa的真空条件下 ,140 0℃保温 2 5h。所合成的CaB6粉末与原材料B4 C粉的形状相似 。The process of synthesizing CaB6 powder by reaction of calcium carbonate with boron carbide and carbon was systematically investigated. The influences of heating temperature and holding time on the reaction product were studied by X-ray diffraction, and the morphologies of CaB6 obtained at different temperatures and holding times were investigated by SEM. It is shown that interaction in the CaCO3-B4C-C system intended to CaB6 formation is a solid phase process which passes through the stages of transition phases Ca3B2O6, CaB2C2 formation etc. The optimal technology of CaB6 synthesis is 2.5 h holding time at 1400°C in 10-2 Pa vacuums. The shape of CaB6 powder is the same as that of B4C, and the properties and shape of CaB6 powder can be improved using good raw materials.

关 键 词：六硼化钙 粉末 反应合成 

分 类 号：TF123.32[冶金工程—粉末冶金]