Influence of Bi Content on the Structure and Dielectric Properties of Lanthanum-modified Bismuth Titanate Ceramics by the Conventional Solid-solution Technique
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 doesnt 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.
Bi-layer perovskite structure BLT dielectric properties ferroelectric ceramics
方频阳 樊慧庆
西北工业大学材料学院,凝固技术国家重点实验室,陕西,西安,710072
国际会议
第二届功能原料国际研讨会(The 2rd International Symposium on Functional Materials)
杭州
英文
895-898
2007-05-16（万方平台首次上网日期，不代表论文的发表时间）