摘要
用固相反应法在1 150℃烧结2h得到了致密的(1-x)ZnWO4-xTiO2(0.1≤x≤0.8)系列微波介质陶瓷,对陶瓷的相组成、显微结构及微波介电性能进行了研究。结果表明:在(1-x)ZnWO4-xTiO2(0.3≤x≤0.5)陶瓷样品中存在ZnWO4、TiO2及Zn2TiO4三相,当Zn2TiO4相的量较多时,样品的微波介电性能较好。随着TiO2的含量增加,(1-x)ZnWO4-xTiO2陶瓷的εr及τf值单调递增,而Q.f值则先上升后下降。当x=0.4时,(1-x)ZnWO4-xTiO2陶瓷样品的微波介电性能为:εr=26.56、Q.f=42 278GHz及τf=61.37×10-6/℃。它是一种具有中等介电常数,中低烧结温度且性能优良的微波介质陶瓷新体系。
A new compact microwave dielectric ceramics, （ 1 -- x） ZnWO4-xTiO2 ceramics （ 0.1 ≤ x ≤0.8 ）, were prepared by the solid state reaction method at the sintering temperature of 1 150 ℃ for 2 h. The composite phases, microstructures,and microwave dielectric properties of the ceramics were studied. It was found that three phases of ZnWO4, TiOz and Znz TiO4 coexisted in the （1 -- x） ZnWO4-xTiOz ceramics （0.3 ≤ x≤0.5） sample and the samples with more Znz TiO4 had the better microwave dielectric properties. The cr and ri of the （1- x）ZnWO4-xTiOz sam- ples increased monotonously with the increase of TiO2 content while the Q f increased firstly and then decreased. When x was 0.4,the optimal microwave dielectric properties of Er= 26.56,Q f=42 278 GHz,and rl=61.37X 10-6/℃ were obtained. This shows that the （1--x）ZnWO4-xTiOz ceramics are a new microwave dielectric ceramics with a middle permittivity, high quality factor, and a low sintering temperature.
出处
《压电与声光》
CSCD
北大核心
2013年第1期108-111,共4页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(50902055)
