惰气熔融-红外热导法同时测定铌钛合金中氧和氮

来源期刊：冶金分析2010年第12期

论文作者：石新层 周恺 杨军红

文章页码：30 - 32

关键词：脉冲加热； 氧； 氮； 铌钛合金

Key words：impulse heating； oxygen； nitrogen； NbTi alloy

摘    要：采用脉冲惰气熔样,红外测定氧,热导测定氮,建立了同时测定铌钛合金中杂质氧和氮的新方法。研究了不同助熔剂、加热功率以及称样量和助熔剂量的比例对实验结果的影响。在分析功率为5.3 kW,用镍做助熔剂,称样量和助熔剂的比例为1∶20的条件下对铌钛合金试样进行测定,氧和氮的相对标准偏差分别为3.0%,5.9%;加标回收率分别为91%～117%,90%～98%。

Abstract: A novel method for simultaneous determination of impurities of oxygen and nitrogen in NbTi alloy by impulse heating inert gas fusion method was developed (oxygen by infrared determination,and nitrogen by thermal conductivity).The effect of fluxes,heating power and the ratio of sample to flux on determination results were studied.Oxygen and nitrogen in NbTi alloy were determined with analytical power of 5.3 kW and the ratio of sample to flux of 1∶20 using nickel as flux.The relative standard deviations (RSD) for oxygen and nitrogen were 3.0% and 5.9%,respectively.The standard addition recoveries for oxygen and nitrogen were 91%-117% and 90%-98%,respectively.