自蔓延高温合成CaB_6的基础研究  

Elementary research on CaB_6 prepared by SHS

作　　者：豆志河[1] 张廷安[1] 侯闯[1] 徐淑香[1] 杨欢[1] 李皇[1] 

机构地区：[1]东北大学材料与冶金学院,沈阳110004

出　　处：《中国有色金属学报》2004年第2期322-326,共5页The Chinese Journal of Nonferrous Metals

摘　　要：估算了CaB6的标准生成熔、恒压热容、标准熵值。通过计算CaO B2O3 Mg反应体系的绝热温度,确定了该体系自蔓延反应进行的可行性。利用自蔓延高温合成的优点,以CaO,B2O3和Mg为原料制备CaB6。对燃烧产物进行X射线衍射分析,从理论上确定了燃烧产物的浸出条件。实验证实了该工艺可行,并得到了理想的CaB6,产品纯度达96.82%。The thermodynamic data of CaB_6 were estimated. The adiabatic temperature was calculated. The SHS process was suggested to product CaB_6, in which B_2O_3 and CaO were taken as raw materials and Mg as a reduction agent. The feasibility of the SHS reaction was determined consequently. It is proved that the SHS process is feasible and CaB_6 with purity of 96.82% is obtained.

关 键 词：绝热温度 CaB6 自蔓延高温合成 稀土 碱土金属 

分 类 号：TF12[冶金工程—粉末冶金]