摘要
研究了掺杂不同浓度CaO对SnO_(2)压敏电阻稳定性的影响,样品在0.9 E_(1mA)/135℃/160 h的连续电压应力下进行交流加速(50 Hz)老化试验,采用扫描电镜(SEM)、X射线衍射、电流-电压(E-J)、电容-电压(C-V)等测试手段对样品进行测量并观察老化前后电学性能和微观结构的变化。结果表明,当CaO掺杂浓度为0.04mol%时,老化后样品的电压梯度最高为744.65 V·mm^(-1),泄漏电流最低为6.88μA·cm^(-2),老化系数为0.058,样品在实际运行中的稳定性有所提高。造成这种变化的主要原因是CaO通过固溶反应后产生的氧空位和深层缺陷促进了势垒的形成。
The effect of CaO on the stability of SnO_(2) varistors was studied.Samples were subjected to accelerated AC(50 Hz)aging test at the conditions of 0.9 E_(1mA)/135℃/160 h,while the electrical properties and microstructure before and after aging were evaluated,by scanning electron microscopy(SEM),X-ray diffraction(XRD),current-voltage(E-J)and capacitance-voltage(C-V)characteristics.As the CaO concentration is 0.04 mol%,the voltage gradient of the sample is up to 744.65 V·mm^(-1),the leakage current is 6.88μA·cm^(-2) and the aging coefficient is 0.058.The main reason for this change is the production of oxygen vacancy and deep defect due to the doping with CaO,where the solid solution reaction promoted the formation of barrier and hence improved stability of the varistors.
作者
孙冠岳
赵洪峰
周远翔
谢清云
蒙晓记
SUN Guanyue;ZHAO Hongfeng;ZHOU Yuanxiang;XIE Qingyun;MENG Xiaoji(The Wind Solar Storage Division of State Key Laboratory of Control and Simulation of Power System and Generation Equipment,School of Electrical Engineering,Xinjiang University,Urumqi 830046,Xinjiang,China;State Key Laboratory of Power System and Power Generation Equipment Control and Simulation,Department of Electrical Engineering and Applied Electronics Technology,Tsinghua University,Beijing 100084,China;Xi'an XD Arrester Co.Ltd.,Xi'an 710200,Shaanxi,China)
出处
《陶瓷学报》
CAS
北大核心
2022年第1期62-67,共6页
Journal of Ceramics
基金
国家自然科学基金资助项目(51762038)。
