三氧化二钕掺杂量对低温烧结BST陶瓷介电性能的影响  

Influence of Nd_2O_3 doping amount on the dielectric properties of BST ceramics sintered at low temperature

作　　者：黄新友[1] 邢仁克 郭淑婧[1] 岳振星[2] 陈志刚[1] 房飞[1] 

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013 [2]清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《电子元件与材料》2014年第12期10-13,16,共5页Electronic Components And Materials

基　　金：新型陶瓷与精细工艺国家重点实验室资助项目(No.KF201411);江苏大学第13批大学生科研立项资助项目(No.13A426);广东省教育部产学研结合资助项目(No.2011B090400027)

摘　　要：采用固相法,研究了Nd2O3掺杂量对ZBS玻璃添加的Ba0.65Sr0.35TiO3(BST)基低温烧结的陶瓷的物相组成、显微结构及介电性能的影响。结果表明:Nd2O3的掺杂并没有改变低温烧结的BST基陶瓷的物相结构,仍为单一钙钛矿结构。随着Nd2O3掺杂量的增大,BST基陶瓷的介电常数先增大然后减小,介质损耗先减小然后增大。当Nd2O3添加质量分数为1.5%,烧结温度为975℃时,BST基陶瓷的综合性能较好,此时相对介电常数为667,介质损耗为0.01,在–30^+85℃容温变化率为–35.2%~14.8%。The influence of Nd2O3 doping amount on material phase, microstructure and the dielectric properties of Ba0.65Sr0.35TiO3（BST） series low temperature sintering ceramics doped with ZBS glass were investigated by the traditional solid state process. The results show that the main crystal phase of BST ceramics doped with Nd2O3 has a perovskite structure and has not the obviously secondary phase. When Nd2O3 doping amount increases, the dielectric constant of BST ceramics increases firstly and then decreases and the dielectric loss decreases firstly and then increases. The dielectric properties of BST ceramics doped with ZBS glass and with mass fraction of 1.5% of Nd2O3 and sintered at 975 ℃ are good：relative permittivity of 667, dielectric loss of 0.01,the change rate of capacitance is –35.2%-14.8% in the range of –30–＋85℃.

关 键 词：低温烧结 Nd2O3掺杂 钛酸锶钡 电容器陶瓷 稀土 介电性能 

分 类 号：TN304[电子电信—物理电子学] TQ174[化学工程—陶瓷工业]