MnO_(2)/Co_(2)O_(3)掺杂对ZnO压敏陶瓷影响的对比研究  

A comparative study:The effect of MnO_(2)/Co_(2)O_(3) doping on ZnO varistors

作　　者：曹文斌 刘士花 刘建科 李智智 徐荣凯 CAO Wen-bin;LIU Shi-hua;LIU Jian-ke;LI Zhi-zhi;XU Rong-kai(School of Arts and Sciences, Semiconductor Materials and Devices Research Center, Shaanxi University of Science & Technology, Xi′an 710021, China)

机构地区：[1]陕西科技大学文理学院半导体材料与器件研究中心,陕西西安710021

出　　处：《陕西科技大学学报》2022年第4期115-120,共6页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(51802183)。

摘　　要：对非饱和过渡金属氧化物中MnO_(2)或Co_(2)O_(3)掺杂ZnO压敏陶瓷的影响进行了对比研究.结果表明:掺MnO_(2)压敏陶瓷内部尖晶石相较多,富Bi相相对较少;同一烧结温度下,MnO_(2)掺杂ZnO压敏陶瓷的非线性系数总体上较高,源于Mn元素在晶界偏析提供了大量界面态,在ZnO晶粒内部分布消耗施主缺陷.借助第一性原理方法分析了Co_(2)O_(3)掺杂ZnO压敏陶瓷有较高最佳烧结温度的原因是Co替位Zn的缺陷形成能较大.为制备高性能ZnO压敏陶瓷在选择添加剂与制定烧结温度方面提供了借鉴.The effect of ZnO varistors doped with MnO_(2) or Co_(2)O_(3) in unsaturated transition metal oxides was studied.The results show that there are more spinel phase and less Bi-rich phase in the MnO_(2)-doped varistor ceramics,and the nonlinear coefficient of MnO_(2)-doped ZnO varistors is generally higher at the same sintering temperature,because Mn provides a large number of interface states and expends donor defects in ZnO grains.The reason for the optimal sintering temperature of Co_(2)O_(3)-doped ZnO varistors was analyzed by first-principles method that because of the higher defect formation energy of Co substitution Zn.The findings of this paper provide reference for selecting additives and setting sintering temperature for preparing high performance ZnO varistors.

关 键 词：ZNO压敏陶瓷 MnO_(2)/Co_(2)O_(3)掺杂 非线性系数 第一性原理 

分 类 号：TQ174[化学工程—陶瓷工业]