铁基非晶合金铁硅硼中硅和硼的测定

以相似材质硼铁和硅钢的化学分析方法为基础，建立了氟硅酸钾沉淀滴定法测定铁基非晶合金铁硅硼中硅、酸溶中和滴定法测定铁基非晶合金铁硼硅中硼的方法。硼的测定在酸溶样方法方面进行了改进，即酸不溶的白色絮状物经过滤分离用碱溶液溶解后，与滤液进行合并。硅的测定也将文献方法进行了一些改进，如减少了氢氟酸的用量并直接加入硝酸钾固体促进氟硅酸钾沉淀完全。本方法与传统方法硅和硼的检测结果相符，且重复性较好。

Determination of silicon and boron in Fe-based amorphous alloy Fe-Si-B

On the basis of chemical analysis method of ferroboron and silicon steel,which has the similar material to Fe-Si-B,the determination of Si by potassium fluosilicate precipitation titration method and the determination of B by acid dissolving alkalimetric method,were investigated for amorphous Fe-based alloy of Fe-Si-B.The sample dissolution method for the determination of B was improved,that was,the acid-insoluble white flocculus substance after filtration was firstly dissolved with alkali solution and then was put together with the filtrate.Some modifications to the classical method of Si,such as the decrease of the amount of hydrofluoric acid and the direct addition of potassium nitrate to promote the complete precipitation,were also proposed.The results were consistent with the traditional methods.Moreover,the repeatabilitiy was satisfactory.