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Microwave Dielectric Properties of LiKSm 2 (MoO 4 ) 4 Ceramics with Ultralow Sintering Temperatures
Author(s) -
Zhai XiaoLiu,
Zheng Xu,
Xi HaiHong,
Li WenBo,
Han Jun,
Zhou Di
Publication year - 2015
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13759
Subject(s) - materials science , sintering , ceramic , temperature coefficient , dielectric , analytical chemistry (journal) , permittivity , microwave , relative permittivity , scanning electron microscope , mineralogy , composite material , chemistry , optoelectronics , physics , chromatography , quantum mechanics
In this work, a novel low‐temperature firing microwave dielectric ceramic LiKSm 2 (MoO 4 ) 4 was prepared via solid‐state reaction method. Ceramic samples with relative densities about 94.6% were obtained at sintering temperature 640°C–680°C. The best microwave dielectric properties was obtained in ceramic sample sintered at 620°C with a permittivity about 11.5, a Q × f value about 39 000 GHz and a temperature coefficient of frequency about −15.9 ppm/°C. According to XRD patterns and backscattered electron micrograph, combined with Energy Dispersive Spectra analysis, of cofired samples with 30 wt% aluminum sintered at 620°C/4 h, the LiKSm 2 (MoO 4 ) 4 ceramic was found to be chemically compatible with Al but react seriously with Ag, forming AgSmMo 2 O 8 phase, at its sintering temperature.