Microwave Dielectric Properties of Na5RE(MoO4)4 (RE = La, Gd, Dy, Er) Ceramics with a Low Sintering Temperature

被引：0
作者：
Liufang Meng
Changlai Yuan
Baohua Zhu
Xiao Liu
Fei Liu
Jiwen Xu
Changrong Zhou
Guohua Chen
机构：
[1] Guilin University of Electronic Technology,College of Material Science and Engineering
[2] Guilin University of Electronic Technology,Guangxi Key Laboratory of Information Materials
来源：
Journal of Electronic Materials | 2019年 / 48卷
关键词：
Low-temperature sintering; microwave dielectric properties; Na; RE(MoO; ); microstructures;
D O I：
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学科分类号：
摘要：
Na5RE(MoO4)4 (RE = La, Gd, Dy, Er) ceramics have been synthesized by the conventional solid-state reaction method. The crystallizations, microstructures and microwave dielectric properties of Na5RE(MoO4)4 ceramics were also investigated. The room-temperature x-ray diffraction patterns of Na5RE (MoO4)4 ceramics illustrate a tetragonal structure with a I 41/a space group. The grain size of Na5La(MoO4)4 is larger than that of Na5RE(MoO4)4 (RE = Gd, Dy, Er) ceramics, and uneven grains are observed in the systems. Na5RE (MoO4)4 ceramics sintered at 570–690°C for 4 h possess excellent microwave dielectric properties with εr = 6.4–8.4, τf = − 27.7–34.3 ppm/°C, and Q × f = 4073–24411 GHz at their optimum sintering temperature. The nonreactivity of Na5Er(MoO4)4 with silver is evidenced by x-ray diffraction, and SEM and EDS analysis reveal that silver can be a co-firable electrode material for the present ceramics.
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页码：656 / 661
页数：5
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