硅酸盐学报2017，Vol.45Issue(3)：366-370,5.DOI:10.14062/j.issn.0454-5648.2017.03.07
钛酸铋钠系陶瓷固溶改性及介电弛豫性能
Modification and Dielectric Relaxation of Sodium Bismuth Titanate Ceramics
摘要
Abstract
The dense sodium bismuth titanate-based solid solution ceramics of (1–x)(Na0.5Bi0.5)TiO3–xLa(Zn0.5Ti0.5)O3 were fabricatedvia an electronic ceramic synthesis technique. The phase structure, microstructure and dielectric property of the ceramics were investigated. The results indicate that the sodium bismuth titanate has a perovskite structure after adding a certain amount of La(Zn0.5Ti0.5)O3. The grain morphology changes from sphere to cube-like as the content of La(Zn0.5Ti0.5)O3 increases. The size of grain is small and the microstructure becomes more uniform. In addition, the dielectric frequency dispersion and relaxation enhance with increasing the content of La(Zn0.5Ti0.5)O3 due to the increased oxygen vacancy in crystal and intensified disorder degree of bothA-site and B-site cations in (Na0.5Bi0.5)TiO3 perovskite lattice. The activation energy for dielectric relaxation decreases from 1.70 to 1.32eV.关键词
固溶陶瓷/钙钛矿/介电弛豫/激活能Key words
solid solution ceramics/perovskite/dielectric relaxation/activation energy分类
化学化工引用本文复制引用
郝星辰,杜慧玲,刘霄,马武祥..钛酸铋钠系陶瓷固溶改性及介电弛豫性能[J].硅酸盐学报,2017,45(3):366-370,5.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)资助. （2012KW–10）
