还原气氛烧成Y5V瓷粉的结构与介电性能  

Investigation on Structure and Dielectric Property of Y5V Ceramic Sintered in Reducing Atmosphere

作　　者：王森[1] 张跃[1] 纪箴[1] 黄运华[1] 顾友松[1] 周成[1] 

机构地区：[1]北京科技大学材料科学与工程学院固体电解质冶金测试技术国家专业实验室,北京100083

出　　处：《电子元件与材料》2005年第7期25-28,共4页Electronic Components And Materials

基　　金：国家自然科学基金重点项目(50232030);国家杰出青年科学基金项目(50325209);教育部留学回国人员科研启动重点基金项目(教外司01-498)

摘　　要：运用SEM和XRD等手段,研究了掺杂对Y5V钛酸钡陶瓷材料结构和性能的影响。SEM和能谱的研究结果表明:掺杂促进了材料的烧结,Nd5+聚集在晶界的位置,形成针状的晶粒。XRD结果表明,掺杂材料中有新相形成,掺杂组分能够促进钛酸钡材料居里点向低温方向移动,并促进介温曲线平滑。还发现,由于还原气氛烧结,材料中电导损耗增加导致介质损耗上升。The effect of dopant on the structure and property of barium titanate based Y5V ceramic was studied by means of SEM and XRD. The results show that the sintering was improved because of the presence of the dopant. Nd5+ are aggregated at the grain boundary and needle shape grains are formed. XRD results show that new phase is formed in the sample. The Curie point of the material shifts to the low temperature because of the existence of the dopant , and the dopant makes the dielectric constant-t curve more flat than that of the pure barium titanate. It also shows that as sintered in reducing atmosphere,the dielectric loss of the material increase.

关 键 词：无机非金属材料 Y5V 钛酸钡 MLCC 介电常数 居里点 

分 类 号：TN304[电子电信—物理电子学]