掺杂及工艺特性对高介BaTiO_3系统性能的影响  

The Effects of Doping and Process Characteristic on Properties of Highdielectric BaTiO_3

作　　者：郭炜[1] 李玲霞[1] 吴霞宛[1] 王洪儒[1] 张志萍[1] 

机构地区：[1]天津大学电子信息学院,天津300072

出　　处：《压电与声光》2002年第6期482-484,共3页Piezoelectrics & Acoustooptics

摘　　要：研究了共沉淀合成的BaTiO3热处理过程,温度过低,粉末为立方相,温度较高时为四方相,烧结后其介电性能较好;掺杂适量的稀土元素Gd2O3可有效的改善陶瓷的介电性能,其在室温下系统介电性能为:ε≥5000,ΔC/C≤±15%,tanδ≤1.2%,R≥1012Ω·cm,满足X7R特性。The process of heattreating of coprecipition was studied.The powder became tetragonal phase which is excellent in dielectric properties at high temperature but cubic phase at low temperature.The doping of rare earth oxides such as Gd2O3 can efficiently improve dielectric properties of ceramics.The dielectric properties of the system are as follows:ε≥5 000,Δ C/C≤±15%,tan δ≤1.2%,R≥1012 Ω·cm,which can meet with X7R characteristic at room temperature.Key wrods:BaTiO3;rare earth oxides;X7R

关 键 词：掺杂 工艺特性 高介BaTiO3 系统性能 稀土元素 X7R 钛酸钡 陶瓷材料 

分 类 号：TM283[一般工业技术—材料科学与工程]