Dielectric Properties and Structure of Yb2O3-Doped (Ba, Sr)TiO3 Ceramics
The effect of Yb<,2>O<,3> doping amount on the dielectric properties of (Ba, Sr)TiO<,3>(BST) series capacitor ceramics prepared using solid state reaction method were studied. With the increasing of Yb<,2>O<,3> doping amount, the dielectric constant(ε) of materials increased, the dielectric loss(tanδ) of materials decreased to minimum when w(Yb<,2>O<,3>) was 0.9％. The BST ceramics with high ε(10000), low tanδ(0. 0213) and high DC breakdown voltage (7.2kV·mm<-1>) were obtained. The influence of Yb<2>O<3> doping amount on the structure of BST ceramics was studied by means of X-ray diffraction (XRD) and scanning electron microscope. The influencing mechanism of Yb<2>O<3> on the dielectric properties of BST ceramics was studied. The results showed that Yb<2>O<3> doping influenced the properties and structure of BST ceramics by means of forming defect solid solution, but did not influence crystal grain size, the crystal phase was single perovskite structure, did not influence XRD data of BST and did not improve capacitance temperature property greatly, but increase dielectric constant greatly. These results provided the basis for Yb<2>O<3>-doped BST series capacitor ceramics.
ytterbium trioxide ceramic capacitor barium and strontium titanate rare earths
Huang Xinyou(黄新友) Chen Zhigang(陈志刚) Gao Chunhua(高春华) Zhao Chen(赵晨)
School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
国际会议
第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)
包头
英文
515-518
2007-08-07（万方平台首次上网日期，不代表论文的发表时间）