Preparation of an electrochemical sensor for measuring the silicon content in molten iron

SENSORS AND ACTUATORS B-CHEMICAL

卷:240

Article

Ju, Liangchen¹  Lu, Hui²  Man, Wenkuan¹  Li, Yang³  Guo, Min¹  Zhang, Mei¹ 

[1] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China

[2] Beifang Univ Nationalities, Sch Mat Sci & Engn, Yinchuan 750021, Ningxia, Peoples R China

[3] Wuhan Univ Sci & Technol, Sch Met & Mat, State Key Lab Refractories & Met, Wuhan 430081, Peoples R China

关键词: Solid electrolyte;    Silicon sensor;    Auxiliary coating layer;    Molten iron;    Membrane electrode;   

DOI  :  10.1016/j.snb.2016.09.038

来源: Elsevier

【 摘 要 】

A silicon sensor for measuring the silicon content in molten iron that included a new membrane electrode was synthesized by coating a slurry of CaF2, SiO2 and 5% Polyvinyl alcohol (PVA) onto the surface of a ZrO2 (MgO) solid electrolyte tube, followed by sintering in a high purity Ar atmosphere. The influences of the preparation conditions, such as the chemical composition, solid (CaF2+SiO2 powder) to liquid (5% PVA solution) ratio and sintering temperature, on the coating layer adhesive properties, active ingredients and detection performance of the formed auxiliary electrode layer were systematically investigated. It is indicated that the synthesized coating layer showed strong adhesive properties and the main active ingredients were SiO2 (ZrSiO4) solid particles-CaO center dot MgO center dot 2SiO(2) solid solution under the optimum preparation conditions. The as-prepared silicon sensor, which was used to detect the silicon content in molten iron at 1450 degrees C, exhibited superior performance. When the silicon content ranged from 0.5 to 1.5% in liquid iron, the testing result from the silicon sensor with a response time of 15 s and steady time greater than 30 s agreed well with the values from the chemical analysis method. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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