Effects of preparation methods on synthesis, microstructures and microwave dielectric properties of Li2TiO3 ceramics
Effects of preparation methods on synthesis, microstructures and microwave dielectric properties of Li2TiO3 ceramics
复制标题
制备方法对Li2TiO3陶瓷的合成、显微结构及微波介电性能的影响
DOI：
10.1080/00150193.2016.1240002
复制
发表时间：
2016
期刊：
影响因子：
0.8
通讯作者：
Li Xuechao
中科院分区：
文献类型：
--
作者：
Ma Jianli;Fu Zhifen;Li Yang;Li Xuechao
摘要：分别采用常规固相法（CSS）和高能球磨法（HEBM）制备Li2TiO3陶瓷。研究了制备方法对Li2TiO3的合成、微观结构和介电性能的影响。用HEBM法在500℃下合成了粒径为30 ~ 80 nm的纯Li2TiO3粉末，比用CSS法合成的Li2TiO3粉末低200℃。采用CSS和HEBM方法分别在1175℃和1000℃下获得Li2TiO3陶瓷，并显示出相似的微波介电性能：ϵr = 17.5, Q × f = 51000 GHz, τf = 28.2 ppm/°C和ϵr = 16.5, Q × f = 54300 GHz, τf = 27.5 ppm/°C。
ABSTRACT The Li2TiO3 ceramics were fabricated by a conventional solid-state method (CSS) and a high-energy ball-milling method (HEBM), respectively. The effects of prepared method on the synthesis, microstructures and dielectric properties of Li2TiO3 were investigated. By using HEBM method, a pure Li2TiO3 powders were synthesized with grain size of 30–80 nm at 500°C, 200°C lower than that synthesized by using CSS method. Furthermore, Li2TiO3 ceramics were obtained at 1175°C and 1000°C by using CSS and HEBM method, respectively, and displayed similarly microwave dielectric properties: ϵr = 17.5, Q × f = 51000 GHz, τf = 28.2 ppm/°C and ϵr = 16.5, Q × f = 54300 GHz, τf = 27.5 ppm/°C.