硅酸盐通报2017，Vol.36Issue(5)：1679-1685,1692,8.
CeO2掺杂钛酸铋钠钾陶瓷的制备工艺与介电性能
Preparation and Dielectric Properties of CeO2-doped Bi0.5Na0.5TiO3-Bi0.5K0.5TiO3 Ceramics
摘要
Abstract
In order to further explore the effect of synthesis process on structure and dielectric properties of the sodium bismuth titanate lead-free materials, thus, taking glycine as fuel, cerium-doped Bi0.5Na0.5TiO3-Bi0.5K0.5TiO3 (BNKT) ceramics were prepared by the solid-combustion composite method.X-ray diffraction (XRD) data shows that the calcined temperature, combining the combustion method in solid phase synthesis process, declined by 150 ℃ than that of conventional solid state method and CeO2 diffused into the lattice of BNKT ceramics, as well as the pure perovskite phase was formed while the amount of CeO2 was 0%-0.3%.SEM images indicate that the doping of CeO2 made grain crystal size uniform and restrained crystal grain growth.The temperature dependence of the dielectric constant and dissipation factor shows that the dielectric constant εr, depolarization temperature Td and the inversion temperature Tm of the antiferroelectric to ferroelectric phase decreased with addition of CeO2, and also the dielectric peak was weakened gradually and the dielectric loss tanδ is below 0.3% between room temperature and 300 ℃.Furthermore, combining microstructural vacancy mechanism with ferroelectric domain wall movement, the law of function is discussed and analyzed.关键词
BNKT/CeO2掺杂/固相-燃烧法/结构/介电性能Key words
BNKT/CeO2-doping/solid-combustion composite method/structure/dielectric property分类
信息技术与安全科学引用本文复制引用
马武祥,杜慧玲,郝星辰..CeO2掺杂钛酸铋钠钾陶瓷的制备工艺与介电性能[J].硅酸盐通报,2017,36(5):1679-1685,1692,8.基金项目
国家自然科学基金(51372197) （51372197）
陕西省重点科技创新团队(2014KCT-04) （2014KCT-04）
陕西省国际科技合作重点项目(2012KW-10) （2012KW-10）
