SiC超细粉末中总硅量的测定

DETERMINATION OF THE TOTAL SILICON IN SiC SUPERFINES

研究了采用ＮａＯＨ＋Ｎａ２Ｏ２混合溶液分液ＳｉＣ超细粉末样品，用硅钼蓝示差分光光度法测定高含量硅的方法。与用无水Ｎａ２ＣＯ３＋ＫＮＯ３做混合熔剂相比，降低了分解温度至７００℃，缩短了分解时间。对硅钼蓝分光光度法测定高含量硅的条件进行了试验，结果表明，本方法操作简便、快速、准确度较高。

The SiC superfines is decomposed by the solution of NaOH- Na2O2 and the silicon is determined by siliconmolybdic blue differential spectrophotometry.By Contrast with the mixed fusion agent of anhydrous Na2CO3+KNO3,the decomposition temperature is reduced to 700 ℃,the solving time is shorter.Also,the test is performed for condition of determination of the high silicon content.The result shows the method is easy to operate withruore,fast and accurate.