电化学电池测量碳饱和铁液中的硅含量

实验室条件下，用ＭｇＯ部分稳定的ＺｒＯ_２作固体电解质，配以ＳｉＯ_２，基辅助电极研制成电化学硅测头，对碳饱和的铁液进行了电动势的测量。测量结果表明：硅测头进入铁液５～１０ｓ后可以获得稳定的电动势，在１７２３～１８２３Ｋ范围内、测量电动势值与热力学计算电动势值符合较好，电动势测量法和化学分析法两种方法所得硅含量值仅相差±０．０３％。该电化学硅测头不用取样，应答时间短，适合现场测量。

DETERMINATION OF SILICON CONTENT IN CABON-SATURATED MELTEN IRON WITH ELECTROCHEMICAL CELL

Laboratory EMFs measurement was conducted in molten Fe + C(sat)+Si system using ZrO2(MgO) solid electrolyte equipped with a new auxiliary electrode SiO2.The results showed that a stable EMF measurement was obtained after immersio of the developed silicon probe in molten Fe within 5 to 10s. In the range of 1723 and 1823K, the measured EMFs value corresponds with thermo-dynamics calculation value. The difference of measured silicon content with the EMF method and chemical analysis is only ±0.03 %. They are in good agreement. Due to the rapid response and accuracy of the silicon sensor, it is applicable in site