用逸氢热导法测定超细陶瓷粉中游离硅和游离铝  

Determination of Free Silicon and Free Aluminum in Ultrafine Ceramic Powder by Hydrogen Evolution-Thermal Conductometry

作　　者：沈汝美[1] 陈名浩[1] 艾星涛[1] 

机构地区：[1]冶金部钢铁研究总院,北京100081

出　　处：《分析化学》1996年第10期1208-1211,共4页Chinese Journal of Analytical Chemistry

摘　　要：利用游离硅（Sif）和游离铝（Alf）与碱溶液作用产生氢气，使它们与SiC、Si3N4、AlN、SiO2以及Al2O3等多种硅（铝）化合物分离。生成的氢用灵敏度高的热导定氢仪检测，探讨了定量分析条件及影响测定精确度的因素，制定了操作简便、测量精度高的分析方法。Free silicon and aluminum in ultrafine SiC, Si3N4 and AlN powder were determined by reacting them with alkali to generate hydrogen which was measured by thermal conductometry. The reaction conditions and precision of measurements were discussed and a method with high sensitivity and simple procedure was proposed.

关 键 词：超细陶瓷粉 游离硅 游离铝 热导法 逸氢热导法 

分 类 号：TQ174.18[化学工程—陶瓷工业]