摘要
采用Ba-Bi复合掺杂对Y2O3·2TiO2微波介质陶瓷进行改性,以降低其烧结温度并改善其介电性能。在固定Bi2Ti2O7掺杂量为质量分数8%的基础上,研究了BaCO3掺杂量对陶瓷微结构、烧结性能和介电性能的影响。结果表明:当w(BaCO3)为1%时,在较低的烧结温度(约1280℃)下保温2h制备了一种新型中介电常数Y2O3·2TiO2微波介质陶瓷。该陶瓷具有较好的介电性能:在1MHz下,εr≈72.5,tanδ≈2.5×10-3;在微波频率(5.03GHz)下,εr=72.1,Q·f值为2241.0GHz。
Y2O3·2TiO2 microwave dielectric ceramics were modified with the Ba-Bi co-doping to reduce the sintering temperature and improve the dielectric properties. With the content of Bi2Ti2O7 being a constant of 8% （mass fraction）, the effects of BaCO3 content on the microstructure, sintering properties and dielectric properties of Y2O3·2TiO2 ceramics were studied. The results show that, when the doping content of BaCO3 is 1% （mass fraction）, a new kind of Y2O3·2TiO2 microwave dielectric ceramic with intermediate dielectric constant and better dielectric properties is obtained after sintering for 2 h at about 1 280℃. In the case of 1MHz, the relative permittivity erand dielectric loss tanδ of this kind of ceramic are 72.5 and 2.5×10^-3 respectively; while in the case of microwave frequency （5.03 GHz）, a relative permittivity of 72.1 and a Q · f value of 2 241.0 GHz could be obtained for this ceramic.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2009年第9期38-41,共4页
Electronic Components And Materials
基金
江苏省高校自然科学重大基础资助项目(No.08KJA430002)
