氧化铝陶瓷陡脉冲真空沿面闪络改性研究  

Research on Steep-sided Pulse Vacuum Surface Flashover Modification for Alumina Ceramics

作　　者：王增彬[1,2] 成永红[2] 

机构地区：[1]广东电网公司电力科学研究院,广东广州510080 [2]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049

出　　处：《广东电力》2012年第12期5-10,共6页Guangdong Electric Power

基　　金：国家自然科学基金联合资助基金项目(NSAF10876024);国家自然科学基金重点项目(50437030)

摘　　要：为了揭示氧化铝陶瓷陡脉冲作用下的真空沿面闪络机理并提高其闪络电压,研究了多种不同添加剂氧化铝陶瓷的真空快脉冲沿面闪络特性。通过添加不同物质的量比的Cr2O3(氧化铬)、TiO2(氧化钛)、MnCO3(碳酸锰)和MgO(氧化镁),制备了10种不同配方的氧化铝陶瓷。测试了各试样陡脉冲作用下的沿面闪络电压、闪络电流和闪络过程中的发光强度。发现加入添加剂的氧化铝陶瓷试样闪络电压均高于无掺杂的试样。根据二次电子发射系数、紫外光和表面缺陷对闪络过程的影响,认为低二次电子发射系数、低能隙和强电荷束缚性的添加剂的共同添加是提高氧化铝陶瓷快脉冲真空沿面闪络电压的可行方法。For announcing vacuum surface flashover mechanism under effect of steep-sided pulse of alumina ceramics and im- proving flashover voltage, this paper studies vacuum fast pulse surface flashover characteristic of various additive alumina ce- ramics. By adding different Cr203, TiO2, MnCO3 and MgO, it prepares of alumina ceramics of 10 kinds formulas. It tests surface flashover voltage under effects of various sampled steep-sided pulse, flashover current and luminous intensity in the process of flashover. It finds out that alumina ceramics sampled flashover voltage mixed with additive is higher than that without additions. According to affects on flashover by secondary electron emission factors, UV-light and surface defects, it considers that joint addition of additives of secondary electro emission factors, low band gaps and strong charge ties are feasi- ble to improve vacuum surface flashover voltage of alumina ceramics fast pulse.

关 键 词：氧化铝陶瓷 脉冲 沿面闪络 添加剂 

分 类 号：TM85[电气工程—高电压与绝缘技术]