埋入式混凝土用氧化铱pH电极的研究  

Effect of oxidation temperature on carbonate melt oxidized Ir OXp H electrodes

作　　者：杜振兴 王鹏刚[1] 赵铁军[1] 金祖权[1] 王兰芹[1] DU Zhenxing;WANG Penggang;ZHAO Tiejun;JIN Zuquan;WANG Lanqin(Department of Civil Engineering,Qingdao University of Technolog)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033

出　　处：《混凝土》2018年第7期129-132,共4页Concrete

基　　金：山东省自然科学基金(ZR2016EEP01);国家自然科学基金青年基金(51608286);国家自然科学基金重点国际合作项目(51420105015)

摘　　要：为了优化制备条件,制备埋入式混凝土用全固态金属氧化物p H电极,采用了熔融碳酸锂加过氧化钠氧化法制备了氧化铱p H电极,研究了氧化温度对p H电极性能的影响。用扫描电镜观察电极表面的微观形貌,在测试液中测试了p H电极的响应时间、能斯特响应,结果表明,750℃制备的电极表面颗粒较小,且分布均匀,致密,电极氧化膜质量、响应时间和电极灵敏度都好于800、850℃制备的电极。750℃制备的电极具有良好的温度系数,在电极老化完成之后具有非常高的稳定性,可用于监测混凝土孔隙液p H变化。In order to optimize preparation conditions and fabricate solid metal oxide p H electrodes which can be embedded in concrete,it adopted the molten lithium carbonate with sodium peroxide oxidation method to fabricate the iridium oxide p H electrode and studied the influence of oxidation temperature on p H electrode performance.Scanning electron microscopy（SEM） was adopted to observe the surface morphology of the IrO_X electrodes,response time,nernst response of the electrodes was also studied and the result shows that the surface of the electrode made at 750 ℃ have a dense and homogenous structure.The electrode made at 750 ℃ have a better performance in electrode oxide film quality,response time and electrode sensitivity than the electrodes made at of 800 ℃and 850 ℃.The electrode made at 750 ℃ has a good temperature coefficient and high stability after aging process,can be used in the monitoring of concrete pore liquid p H changes.

关 键 词：混凝土pH值 埋入式pH电极 熔融氧化法 氧化温度 

分 类 号：TU528.01[建筑科学—建筑技术科学]