【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。更多还原

【Abstract】 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.更多还原