Effect of Y2O3 and Dy2O3 on Dielectric Properties of Ba0.7 Sr0.3 TiO3 Series Capacitor Ceramics
The effects of rare earth oxide (Y2O3 and Dy2O3) on the microstructure and dielectric properties of Bao. 7Sr0.3TiO3(BST) series capacitor ceramics were studied, and the low of the influence of Y2O3 and Dy2O3 doping amount on theBST series capacitor ceramics was obtained. The strong correlation was observed between the dopant concentration and ma-terials properties. It was also found out that different rare earth oxides and amount had different influences on BST. The experimental results showed that the dysprosium oxide (Dy2O3)could restrain abnormal grain growth during the sintering process and fining grain, the yttrium oxide(Y2O3) could decrease dielectric loss, and the permittivity could be increased by more than 40％ compared with nominally undoped BST ceramics. The BST ceramics with optimum comprehensive properties was obtained, having high dielectric constant (ε =3658), low dielectric loss (tanδ =0. 0093) and low dielectric constant temperature changing rate absolute value ((△ε/ε) =14.1％ ) while w(Dy2O3) =1.00％.
Y2O3 Dy2O3 capacitor ceramics barium and strontium titanate doping modification rare earths
Zhao Chen Huang Xinyou Guan Hao Gao Chunhua
School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
国际会议
海口
英文
197-200
2006-11-13（万方平台首次上网日期，不代表论文的发表时间）