硅酸盐学报2017，Vol.45Issue(12)：1763-1769,7.DOI:10.14062/j.issn.0454-5648.2017.12.06
Nb5+掺杂BaZr0.1Ti0.89Fe0.01O3陶瓷的晶体结构及介温特性
Crystal Structure and Dielectric Properties of Nb-doped BaZr0.1Ti0.89Fe0.01O3 Ceramics
闫树浩 1郑占申 1李远亮 1汪宇凡 1顿温新1
作者信息
- 1. 华北理工大学材料科学与工程学院,河北省无机非金属重点实验室,唐山市环境功能材料重点实验室,河北唐山 063210
- 折叠
摘要
Abstract
BaZr0.1Ti0.89Fe0.01O3-yNb2O5 (BZTF-yNb) ceramics were synthesizedvia a conventional solid state reaction route. The effect of Nb2O5 addition on the crystal structure, microstructure and diffuse phase transition of BZTF ceramics were investigated by X-ray diffraction, scanning electron microscopy and capacitance measurement. The results show that all the samples have a single perovskite structure, and the crystal structure of Nb-doped BZTF is slightly adjusted. The tetragonal structure of 0.75% (in mole fraction) Nb-doped samples was determined at room temperature. The dielectric constant increases and the dielectric loss decreases with the increase of Nb2O5 content from 0.00% to 0.75%. Nb2O5 can stabilize the tetragonal structure, increase the Curie temperature and make the phase transition from ferroelectric phase to paraelectric phase, indicating the stable temperature-dependent dielectric properties. It is indicated that 0.75% Nb-doped sample sintered at 1300℃ has the optimal dielectric properties (ε=6039, tanδ=0.006, TC=16℃ andγ=1.98).关键词
五氧化二铌/弥散相变/介温特性Key words
niobium oxide/diffuse phase transition/dielectric temperature characteristic分类
化学化工引用本文复制引用
闫树浩,郑占申,李远亮,汪宇凡,顿温新..Nb5+掺杂BaZr0.1Ti0.89Fe0.01O3陶瓷的晶体结构及介温特性[J].硅酸盐学报,2017,45(12):1763-1769,7.
