CAJ | 학술논문

研究了Er_2O_3掺杂对ZnO压敏电阻微观结构和电性能的影响.实验发现,在ZnO压敏电阻中加入Er_2O_3不仅可以提高压敏电压V1mA,同时还可改善非线性系数和漏电流特性.但过量的Er_2O_3将会使压敏电阻的耐大电流冲击特性劣化.微观结构和XRD图谱分析表明,Er_2O_3以一种化合物的形式存在于晶界,阻碍了晶界的运动,使材料烧结后具有较小的晶粒尺寸,并且粒径分布比较均匀.当Er_2O_3的添加量为0.8 mol%时,样品的压敏电压V1mA约为360 V/mm,非线性系数α达到86,并且在8/20 μs的耐大电流冲击能力的试验中,样品耐受冲击电流的峰值大于1.6 kA/cm~2.
연구료Er_2O_3참잡대ZnO압민전조미관결구화전성능적영향.실험발현,재ZnO압민전조중가입Er_2O_3불부가이제고압민전압V1mA,동시환가개선비선성계수화루전류특성.단과량적Er_2O_3장회사압민전조적내대전류충격특성열화.미관결구화XRD도보분석표명,Er_2O_3이일충화합물적형식존재우정계,조애료정계적운동,사재료소결후구유교소적정립척촌,병차립경분포비교균균.당Er_2O_3적첨가량위0.8 mol%시,양품적압민전압V1mA약위360 V/mm,비선성계수α체도86,병차재8/20 μs적내대전류충격능력적시험중,양품내수충격전류적봉치대우1.6 kA/cm~2.
The effect of Er_2O_3 on the microstructure and electrical properties was studied. It was found that Er_2O_3 doping can substantially increase the breakdown voltage and improve the nonlinear coefficient and leakage current. But excessive Er_2O_3 will decrease the withstanding surge current. The microstructure analysis and XRD patterns indicate that Er_2O_3 additive exists in ZnO grain boundary in the form of a new compound and hinders the movement of grain boundary, which reduces the size of ZnO grain and makes the grains more uniform. The result shows that with doping of 0.8 mol% Er_2O_3, the breakdown voltage is about 360 V/mm, nonlinear coefficient reaches 86 and the withstanding surge current of 8/20μs waveshape is higher than 1.6 kA/cm~2.