文档介绍：
Low temperature sintering and microwave dielectric
properties of Li2TiO3-posite ceramics
Wang Zhen, Song Li, Bian Jianjiang**
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(Department of anic Materials, Shanghai University, ShangHai 200072)
Abstract: (1-x)Li2TiO3-posite ceramics could be densified at low temperature (950°C)
by liquid-phase sintering. The phase assemblages, microstructures and position were
studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive
spectroscopy (EDS), respectively. Microwave dielectric properties were measured with work
analyzer. It was found that Li2TiO3 and Li2WO4 coexisted after sintering at 950°C/2h. Both εr and τf
of posite ceramics decreased linearly with the increase of Li2WO4 phase. The optimized Q´f
value increased with increasing Li2WO4 content and reached a maximum value of about 80000 GHz at
x=-. Further increase in x remarkably decreased the Q´f value. The x= sintered
at 950 oC possesses bined microwave properties with εr =, Q´f = 81,099 GHz and
τf= ppm/ oC. The patibility between posite and Ag has also been investigated.
It indicates that Ag diffused into the Li2WO4 phase and formed an unknown phase at 900°C/2h,
although isolated Ag still existed in the cofired specimen.
Keywords: Composite ceramics; ; Micowave dielectric properties
0 Introduction
Li2TiO3 with mon