Novel Sr3Y2Ge3O12 microwave ceramics: Sintering behavior, phase composition, microstructure and dielectric properties

被引：25

作者：

Liu, Yanjun ^{[1
]}

He, Guoqiang ^{[1
]}

He, Yinghan ^{[1
]}

Deng, Haiqing ^{[1
]}

Wei, Xiaoli ^{[1
]}

Gao, Pengxiang ^{[1
]}

Li, Hongtian ^{[1
]}

Qin, Hailan ^{[1
]}

Qu, Xin ^{[1
]}

Xiao, Yaqi ^{[1
]}

Deng, Shan ^{[1
]}

Liu, Kaiyang ^{[1
]}

Wu, You ^{[1
]}

Zhou, Huanfu ^{[1
]}

机构：

[1] Guilin Univ Technol, Sch Mat Sci & Engn, Key Lab Nonferrous Mat & New Proc Technol, Minist Educ, Guilin 541004, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2023年 / 49卷 / 08期

关键词：

Low permittivity; Garnet; Sintering dielectric properties; CRYSTAL-STRUCTURE; TRANSITION; WOLFRAMITE; CONSTANTS;

D O I：

10.1016/j.ceramint.2022.12.193

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Sr3Y2Ge3O12 ceramics were prepared by a solid-phase reaction method. X-ray diffraction patterns and Rietveld refinement showed that the ceramics have a cubic garnet structure belonging to the Ia-3d space group. The scanning electron microscopy analysis illustrated that the ceramic material is relatively dense and homogeneous with clear grain boundaries at the optimum sintering temperature. The dielectric constant and quality factor has a strong correlation with bulk density. The Sr3Y2Ge3O12 ceramic sintered at 1275 degrees C exhibited good microwave dielectric properties: epsilon r = 7.23, Q x f = 27203 GHz and tau f =-26.79 ppm/degrees C. The value of Q x f increases to 45000 GHz when the ambient temperature rises to 150 degrees C. Besides, a high bulk density of 4.68 g/cm3 and a relative density of 92.9% were also obtained.

引用

页码：13150 / 13157

页数：8

共 33 条

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