摘要
采用固相合成法,通过控制烧结温度和烧结时间,成功制备了单相Ba2Ti9O20基微波介质陶瓷。采用XRD、SEM研究了Ba2Ti9O20基微波介质陶瓷的物相组成和微观结构,采用平行板谐振法测试了Ba2Ti9O20基微波介质陶瓷的微波介电性能。结果表明,单相Ba2Ti9O20微波介质陶瓷具有均匀一致的等轴晶,过高或过低的烧结温度将导致柱状BaTi4O9晶出现。1 360℃烧结4.5 h制备的Ba2Ti9O20基微波介质陶瓷介电性能为:?r=39.53,Q?f=33 800 GHz,τf=1.68×10–6/℃。
Ba2Ti9O20 microwave dielectric ceramic was prepared successfully through the solid-state synthesis method by controlling the sintering temperature and holding time. The phase composition and microstructure of Ba2Ti9O20 ceramic were investigated by using XRD and SEM. The microwave dielectric properties of Ba2Ti9O20 ceramic were measured by the parallel plate resonant method. Research results show that the Ba2Ti9O20 phase possesses homogeneous equi-axis grain, and the BaTi4O9 with columnar grain will emerge at higher sintering temperature and lower sintering temperature. Good microwave dielectric properties of ξr=39.53, Q×f = 33 800 GHz, τf = 1.68？10–6/℃ are obtained for the Ba2Ti9O20 ceramic sintered at 1 360 ℃ for 4.5 h.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2014年第7期12-15,共4页
Electronic Components And Materials
基金
广东省战略新兴产业核心技术攻关资助项目(No.2011A091103002)
关键词
微波介质陶瓷
Ba2Ti9O20
固相合成
介电性能
显微结构
相组成
microwave dielectric ceramic
Ba2Ti9O20
solid state synthesis
dielectric properties
microstructure
phase composition
