脉冲熔融法测定金属及陶瓷中氧、氮含量的研究进展

Research Progress in Determination of Oxygen and Nitrogen in Metals and Ceramic Materials by Pulse Fusion Method

脉冲熔融法已广泛用于金属及陶瓷中氧、氮含量的测定。然而,国内关于相关设备的研究报道较少,在实际分析中,主要依据条件试验确定最佳参数,依赖加标回收保证准确度,缺少必要的理论研究及辅助方法验证检测结果。国外相关研究比较深入,设备、理论研究以及辅助方法应用均不乏亮点。基于此,系统介绍了设备,特别是检测系统、气路系统的改进,石墨坩埚的应用进展及其差异对测定的影响,还介绍了国外在钢中超低氧、活化金属分析以及陶瓷中氧、氮分析等方面的研究工作,并与国内相关工作进行对比,指出可靠的比对试验可帮助发现传统方法中存在的问题,而理论研究可从根本上解释所观察的试验现象(引用文献78篇)。

Pulse fusion method had been widely used for determination of oxygen and nitrogen in metals and ceramics.However,few researches were reported on relevant equipments in China.In the actual analysis,the optimal parameters were mainly obtained according to the conditional tests,the accuracy was ensured relying on the standard addition recovery,and necessary theoretical researches and auxiliary methods for verifying the test results was lacking.The relevant researches abroad were relatively wealthy,and there were many highlights in the application of equipments,theoretical research and auxiliary methods.Based on those,equipment improvements,especially for detection system and pneumatic system,the application progress of graphite crucibles and effect of crucible difference on the determination were systematically introduced.The research work abroad on ultra-low oxygen in steel,activated metal analysis,and oxygen and nitrogen analysis in ceramic materials were also introduced,which were compared with the domestic related work.It was concluded that reliable comparison tests could help to find the problems existing in traditional methods,and theoretical research could fundamentally explain the observed testing phenomena(78 ref.cited).