恒温闪烧制备氧化锌压敏陶瓷及电性能研究  

Preparation and Electrical Properties of Zinc Oxide Varistor Ceramics by Flash Sintering at Constant Temperature

作　　者：石梦阳 陈曹宏 姜明 许菁荣 徐东 SHI Mengyang;CHEN Caohong;JIANG Ming;XU Jingrong;XU Dong(Anhui University of Technology,Maanshan 243002,China)

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243002

出　　处：《电瓷避雷器》2023年第5期67-71,共5页Insulators and Surge Arresters

基　　金：国家自然科学基金(编号:52072004)。

摘　　要：传统的烧结方法增加ZnO压敏陶瓷的消耗成本。因此,需要继续研究提高ZnO压敏陶瓷的节能效果及综合性能优化的技术。利用恒温闪烧技术,在250 V/cm电场强度和2.0 A限制电流下制备ZnO-Bi_(2)O_(3)基压敏陶瓷。将950℃恒温闪烧制备ZnO-Bi_(2)O_(3)基压敏陶瓷与1 100℃下的传统烧结制备样品相比的结果表明,恒温闪烧和传统烧结制备样品的致密度都可达到98%。恒温闪烧制备的样品获得更佳的压敏性能,电位梯度为656 V/mm,非线性系数为41.9。因此,ZnO压敏陶瓷能够通过恒温闪烧制备获得均匀的显微结构和优异的电性能。The traditional sintering method increases the consumption cost of ZnO varistor ceramics.Therefore,it is necessary to study the technology to improve the energy-saving effect and comprehensive performance optimization of ZnO varistor ceramics.Using constant temperature flash sintering technology,ZnO-Bi_(2)O_(3) based varistor ceramics were prepared under 250 V/cm electric field strength and 2.0 A li-mited current.Comparing the ZnO-Bi_(2)O_(3) based varistor ceramic prepared by constant temperature flash sintering at 950℃with the samples prepared by traditional sintering at 1100℃,the results show that both the constant temperature flash sintering and traditional sintering prepared samples can achieve 98%density.The sample prepared by constant temperature flash sintering has better varistor performance with threshold voltage of 656 V/mm and a nonlinear coefficient of 41.9.Therefore,ZnO varistor ceramics can be prepared by constant temperature flash sintering to obtain uniform microstructure and excellent electrical properties.

关 键 词：压敏陶瓷 氧化锌 恒温闪烧 微观结构 电性能 

分 类 号：TQ174.1[化学工程—陶瓷工业]