材料科学与工程学报2007，Vol.25Issue(6)：895-898,4.
铋含量对钛酸镧铋陶瓷结构和介电性能的影响
Influence of Bi Content on the Structure and Dielectric Properties of Lanthanum-modified Bismuth Titanate Ceramics by the Conventional Solid-solution Technique
摘要
Abstract
Lanthanum-modified bismuth titanate, Bi3.25-x La0.75Ti3O12 (BLT) ceramics, with x ranging from 0.98 to 1.03 were prepared by the conventional solid-solution technique. The crystal structure, morphological and dielectric properties of BLT ceramics were investigated by the X-ray diffraction (XRD), the scanning electron microscopy (SEM) and the impendence analyzer. It is indicated that the crystal structure of ceramic is a classic Bi-layer perovskite structure. The crystal structure doesn't change with bismuth content and the sintering temperature. The micro morphology transformes from stick-like crystal grains to slice-like crystal grains with bismuth content increasing . The dielectric constant firrstly increases then decreases with increasing content of bismuth, and arrives at a maximum at x = 1.02.关键词
铋层状钙钛矿结构/BLT/介电性能/铁电陶瓷Key words
Bi-layer perovskite structure/ BLT/ dielectric properties/ ferroelectric ceramics分类
通用工业技术引用本文复制引用
方频阳,樊慧庆..铋含量对钛酸镧铋陶瓷结构和介电性能的影响[J].材料科学与工程学报,2007,25(6):895-898,4.基金项目
National Nature Science Foundation (50672075) and the Xi'an S&T Research Foundation (GG05015, GG06023), the SRFDP (20050699011) and EYTP and NCET Program of MOE, Science Creative Foundation (2006CR06) NPU of China. （50672075）
