粉末冶金技术2017，Vol.35Issue(6)：411-415,421,6.DOI:10.19591/j.cnki.cn11-1974/tf.2017.06.002
MnO2掺杂BaTi4O9陶瓷微波介电性能研究
Study on microwave dielectric properties of BaTi4O9 ceramics doped by MnO2
韩伟丹 1董桂霞 1吕易楠 1张茜1
作者信息
- 1. 华北理工大学材料科学与工程学院,唐山 063000
- 折叠
摘要
Abstract
Pure and MnO2-doped BaTi4O9 ceramics (0～0.16％ MnO2 by mass) was fabricated by the conventional solid state reaction method, the phase composition, microstructures, and dielectric properties of MnO2-doped BaTi4O9 ceramics were investigated as the functions of MnO2 content by mass. X-ray diffraction (XRD) and scanning electron microscopy (SEM) studies show that Mn is completely dissolved into BaTi4O9 ceramics. As the MnO2 content increases, a more uniform grain size distribution is obtained, the relative density is improved, the dielectric constant is slightly reduced, and the quality factor and temperature coefficient increase significantly and then decrease. It can be determined that the dielectric properties of MnO2-doped BaTi4O9 ceramics are improved due to the Ti substitution by Mn which can inhibit Ti4+ to Ti3+ to some extent. The microwave dielectric properties of BaTi4O9 ceramics doped by 0.08％ MnO2 by mass sintered at 1250℃ for 4 h are optimal, thedielectric constant (εr) is 34.56, the quality factor (Q·f) is49097 (the center frequency is 5.08 GHz), the temperature coefficient (τf) is 14.997×10-6/℃, and the relative density is 97％.关键词
微波介电陶瓷/固相反应法/掺杂/介电性能Key words
microwave dielectric ceramics/solid state reaction method/doping/dielectric properties分类
化学化工引用本文复制引用
韩伟丹,董桂霞,吕易楠,张茜..MnO2掺杂BaTi4O9陶瓷微波介电性能研究[J].粉末冶金技术,2017,35(6):411-415,421,6.
