BaO-B_2O_3-SiO_2玻璃助剂中SiO_2对低温烧结PTCR陶瓷性能的影响  

Influence of SiO_2 among BaO-B_2O_3-SiO_2 Sintering Aid on Low Temperature Sintering Characteristics of PTCR Ceramics

作　　者：孔明日[1] 姜胜林[1] 涂文芳[1] 

机构地区：[1]华中科技大学电子科学与技术系,武汉430074

出　　处：《材料导报》2009年第12期68-70,74,共4页Materials Reports

基　　金：国家863项目(SQ2008AA03Z4471960);武汉市科技计划项目(200810321128)

摘　　要：研究了氧化钡-氧化硼-氧化硅(BaO-B2O3-SiO2)玻璃助剂对Y掺杂BaTiO3陶瓷微观结构和PTCR特性的影响。微观结构分析表明,玻璃助剂中SiO2的含量能改变晶界相组成,影响样品的烧结特性和室温电阻率。实验结果表明,当含有5%SiO2(摩尔分数)的BaO-B2O3-SiO2玻璃助剂的添加量为3%(质量分数)时,在1050℃保温3h烧结的样品的室温电阻率为210Ω.cm,升阻比为3.5个数量级。Effects of BaO-B2O3-SiO2 glass additive on microstructures and PTCR characteristics of Y-doped Ba- TiO3 ceramics are investigated. The Y-doped BaTiO3 ceramics with glass additive are characterized by methods of XRD, SEM. The SiO2 content in BaO-B2O3-SiO2 glass additive influences the microstructures, sintering properties and room-temperature resistivity of sample. The experimental results indicate that the samples with BaO-B2O3-SiO2 glass adding 5mol% SiO2 can be sintered at low temperature of 1050℃, and when adding 3wt% glass additive, the room-temperature resistivity of sample is 210Ω· cm and the resistivity jump is 10^3 -10^4.

关 键 词：Y掺杂BaTiO3陶瓷 氧化钡-氧化硼氧化硅玻璃助剂 低温烧结 PTCR效应 

分 类 号：TQ171.718[化学工程—玻璃工业] TN373[化学工程—硅酸盐工业]