Microwave dielectric properties of SiO2 ceramics with addition of Li2TiO3
Microwave dielectric properties of SiO2 ceramics with addition of Li2TiO3
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添加Li2TiO3的SiO2陶瓷的微波介电性能
DOI:
10.1016/j.materresbull.2015.01.034
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发表时间:
2015-05
影响因子:
5.4
通讯作者:
Liu, Peng
中科院分区:
文献类型:
--
作者:
Hu, Chengxi;Liu, Peng
Using a conventional solid-state reaction method SiO2ceramics with addition of Li2TiO3were synthesized and their phase evolution, chemical reactions, microstructure and microwave dielectric properties were studied. The microwave dielectric properties of SiO2ceramics with addition of Li2TiO3strongly depend on the formation and the decomposed of Li2(TiO)(SiO4) intermediate phase. The tridymite phase was formed for all samples sintered above 1150 °C and its microwave dielectric properties were reported for the first time (ϵr= 2.58,Q×f= 25,800 GHz,τf= −17.8 ppm/°C). The promising ceramics of 0.945SiO2–0.055Li2TiO3sintered at 1050 °C were found to possess good microwave dielectric properties:ϵr= 3.21,Q×f= 10,180 GHz andτf∼ 0.17 ppm/°C.
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