电子元件与材料2017，Vol.36Issue(5)：12-15,4.DOI:10.14106/j.cnki.1001-2028.2017.05.003
烧结温度对Li2(Mg1/2Zn1/2)SiO4系微波陶瓷介电性能的影响
Effect on microwave dielectric properties of Li2(Mg1/2Zn1/2)SiO4ceramics with different sintering temperatures
摘要
Abstract
Li2(Mg1/2Zn1/2)SiO4 ceramics were prepared by the conventional solid-state reaction process. The phase composition, microstructures and microwave dielectric properties of the Li2(Mg1/2Zn1/2)SiO4 ceramics were investigated systematically. The XRD results show that the present ceramic systems are mainly composed of Li2(Mg0.8Zn0.2)SiO4 (main phase) and MgSiO3 (second phase) in the range of sintering temperatures from 1100 ℃ to 1180 ℃. The SEM images illustrate that the average grain sizes increase with increasing sintering temperatures, especially some larger grains accompanied by the cracks could be observed as sintering at 1180 ℃, which has a negative effect on quality factor (Q·f ). Thus, for the microwave dielectric properties, the Q·f values firstly increase and then decrease, while the values of permittivity (εr) are basically stable with an increasing of sintering temperature. Additionally, the temperature coefficient of resonant frequency (τf ) gradually shifts to the positive direction as increasing sintering temperature. Wherein, the Li2(Mg1/2Zn1/2)SiO4 ceramics sintered at 1160 ℃ for 4 h have an excellent microwave dielectric properties of εr=6.09, Q·f =21616 GHz (at 11.62 GHz) and τf =–64.34×10–6/℃.关键词
微波陶瓷/Li2(Mg1/2Zn1/2)SiO4/微观形貌/相成分/烧结温度/介电性能Key words
microwave ceramic/Li2(Mg1/2Zn1/2)SiO4/microstructure/phase composition/sintering temperature/dielectric property分类
信息技术与安全科学引用本文复制引用
屈婧婧,魏星,马莉,刘飞,袁昌来,黄先培..烧结温度对Li2(Mg1/2Zn1/2)SiO4系微波陶瓷介电性能的影响[J].电子元件与材料,2017,36(5):12-15,4.基金项目
国家自然科学基金资助(No.61561011) （No.61561011）
广西高校中青年教师基础能力提升项目(No.KY2016YB534) （No.KY2016YB534）
