Structure and dielectric properties of Ca doped Batil2Si2O8

被引：18

作者：

Yang Xiaojing ^{[1
]}

Zhang Yao ^{[2
]}

Ding Shihua ^{[2
]}

Huang Long ^{[2
]}

Zhang Xiaoyun ^{[2
]}

机构：

[1] Xihua Univ, Sch Food & Bioengn, Chengdu 610039, Sichuan, Peoples R China

[2] Xihua Univ, Sch Mat Sci & Engn, Chengdu 610039, Sichuan, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2018年 / 44卷

关键词：

Dielectric properties; Ba1-xCax Al2Si2O8; Defects; TRANSFORMATION; BAO-AL2O3-SIO2; CERAMICS; KINETICS;

D O I：

10.1016/j.ceramint.2018.08.263

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：

Ba1-xCaxAl2Si2O8 ceramics were prepared by solid state sintering. The crystal structure and microwave dielectric properties of BaO-Al2O3-SiO2 with different Ca contents were investigated. The results show that Ca can greatly promote the transformation from hexacelisian to celsian, in case of x >= 0.05 the transformation will reach 100%. The crystal unit-cell volume decreases with the increase of the content of Ca. The celsian is rod-like grain and the grain size decreases gradually when the amount of Ca increases. The dielectric constant and the bulk density have the similar trend. The Q x f value increase from 12,882 GHz at x = 0 to the maximum of 24,335 GHz at x = 0.05 then decreases with increasing the amount of Ca. The Ba0.9Ca0.05Al2Si2O8 sintered at 1425 degrees C showed a high Q x f of 24335 GHz, p = 3.161 g/cm(3,) epsilon(r) = 6.65 and tau(f) = 19.3 ppm/ degrees C at x = 0.05.

引用

页码：S43 / S45

页数：3

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