| High Dielectric Constant and Low-loss Dielectric Ceramies of Sr5LnTi3Ta7O3o （Ln= La,Nd, Sm and Y） |
| |
| 作者姓名： | TU Wenmao CHEN Pu PENG Xiyang LIU Ting |
| |
| 作者单位： | TU Wenmao（School of Resource and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China） ;
CHEN Pu（School of Resource and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China） ;
PENG Xiyang（School of Resource and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China） ;
LIU Ting（School of Resource and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China） ; |
| |
| 摘 要： | Polycrystalline Sr5LnTi3Ta7O30 （Ln=La, Nd, Sm and Y） ceramics were prepared as single-phase materials through conventional solid-state ceramics method. The structure was characterized by X-ray diffraction method and scanning electron microscopy （SEM）. The dielectric properties were measured from room temperature to 400℃. All compounds are paraelectric phases adopting the filled tetragonal tungsten bronze （TB） structure at room temperature. At 1 MHz their dielectric constant （ετ） varied from 109 to 139, dielectric loss changed from 0.003 3 to 0.005 8, and the temperature coefficients of the dielectric constant （τε） moved from -710 to -880×10^-6℃^-1.
|
| 关 键 词： | 介电陶瓷 介电性能 钨 铜 钽酸盐 介电常数 |
| 收稿时间： | 28 November 2007 |
| 本文献已被 维普 万方数据 SpringerLink 等数据库收录！ |
|
