Preparation, phase structure and microwave dielectric properties of a new low cost MgLi2/3Ti4/3O4 compound
Preparation, phase structure and microwave dielectric properties of a new low cost MgLi2/3Ti4/3O4 compound
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DOI：
10.1016/j.matchemphys.2012.09.004
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发表时间：
2012-11
影响因子：
4.6
通讯作者：
Huanfu Zhou;Xiaobin Liu;Xiuli Chen;L. Fang
中科院分区：
文献类型：
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作者：
Huanfu Zhou;Xiaobin Liu;Xiuli Chen;L. Fang
A novel Li-based spinel compound with the composition of MgLi2/3Ti4/3O4was synthesized by the conventional solid-state reaction method. The phase structure was studied by X-ray diffraction (XRD) technique. When the calcination temperature was over 1050 °C, a single phase compound which has a cubic structure [Fd-3m (227)] with cell parameters of a = 8.4057 Å, V = 593.91 Å3, ρ = 3.51 g cm−3and Z = 8 was obtained. MgLi2/3Ti4/3O4ceramic could be well densified after sintering above 1125 °C. The microwave dielectric properties were measured using a microwave vector network analyzer in the frequency range of 7–9 GHz MgLi2/3Ti4/3O4ceramic sintered at 1125 °C for 2 h showed microwave dielectric properties of ɛr= 20.2, Q × f = 62,300 GHz, and τf= −27.1 ppm °C−1. Furthermore, 0.95MgLi2/3Ti4/3O4–0.05CaTiO3ceramic sintered at 1200 °C for 2 h exhibited good properties of ɛr= 22.6, Q × f = 48,000 GHz, and τf= −2.3 ppm °C−1.
