可溶解氧化铅的氧气传感器电解液性能研究  

Research on Properties of PbO-Dissoluble Electrolyte Used in Oxygen Sensor

作　　者：汪建德 苏寒雨 龚靖博 刘海峰 WANG Jian-de;SU Han-yu;GONG Jing-bo;LIU Hai-feng(Sichuan Jiuyuan Intelligent Fire Equipment Co.,Ltd.Mianyang 622650,China;Analytical&Testing Center of Southwest University of Science and Technology,Mianyang 621010,China;University-Enterprise Joint Laboratory of Sichuan JiuyuanIntelligent Fire Equipment Co.,Ltd.,and Southwest University of Science and Technology,Mianyang 622650,China)

机构地区：[1]四川久远智能消防设备有限责任公司,四川绵阳622650 [2]西南科技大学分析测试中心,四川绵阳621010 [3]四川久远智能&西南科大校企联合实验室,四川绵阳622650

出　　处：《传感器世界》2023年第8期16-20,I0002,共6页Sensor World

摘　　要：针对电化学氧传感器使用过程中阳极产物氧化铅积累导致传感器性能下降甚至失效过快的问题,在以磷酸氢二钾为缓冲成分的电解液中,复配了乙二胺四乙酸二钠来溶解产生的氧化铅。研究结果表明:磷酸氢二钾的加入能有效稳定电解液参与络合反应后的pH值,同时减小电解液在空气中的挥发速度。经验证,电解液对阳极铅丝没有明显的腐蚀效应;在含络合剂的电解液溶解氧化铅达上限后,其导电能力得到增强,有利于传感器性能保持;对使用复配电解液的氧传感器进行了响应性能测试,响应时间小于11 s,恢复时间小于9 s,响应稳定性良好,可达到商业传感器技术水平。Due to the problem that the anode product lead oxide accumulates during the use of electrochemical oxygen sensors,which led to the performance degradation or even rapid failure of oxygen sensors,disodium ethylenediaminetetraacetate(disodium EDTA)was compounded with dipotassium hydrogen phosphate(K2HPO4)as a buffering component in the electrolyte to dissolve the generated lead oxide.The results showed that the addition of K2HPO4 could effectively stabilize the pH value of the electrolyte after the complexation reaction and reduce the volatilization rate of the electrolyte in the air.The electrolyte had no significant corrosion effect on the anode lead wire.After the electrolyte containing the complexant dissolved the maximum amount of lead oxide,its conductivity was enhanced,which was beneficial to the maintenance of the sensor performance.The response performance of the oxygen sensor using the compound electrolyte was tested.The response time was less than 11 s and the recovery time was less than 9 s.The response stability was good and could reach the level of a commercial sensor technology.

关 键 词：电化学 气体传感器 氧气 电解液 氧化铅 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]