Investigation of phase composition and microwave dielectric properties of MgO-Ta2O5 ceramics with ultrahigh Qf value

doi:10.1111/jace.15434

	Investigation of phase composition and microwave dielectric properties of MgO-Ta2O5 ceramics with ultrahigh Qf value
	Dang, Mingzhao 1; Ren, Haishen 1; Yao, Xiaogang ; Peng, Haiyi 1; Xie, Tianyi 2; Lin, Huixing ; Luo, Lan
刊名	JOURNAL OF THE AMERICAN CERAMIC SOCIETY
	2018
卷号	101 期号:7 页码:3026
关键词	MgO-Ta2O5 ceramics microwave dielectric properties ultrahigh-quality factor
ISSN号	0002-7820
DOI	10.1111/jace.15434
英文摘要	Four MgO-Ta2O5 ceramics with the MgO/Ta2O5 mole ratio x = 1, 2, 3, and 4 were prepared by traditional solid-state reaction method, and the influence of x on the phase composition, microstructure, and dielectric properties (the dielectric constant epsilon(r), the temperature coefficient of resonant frequency (f) and the quality factor Qf) of the materials was investigated using XRD, SEM, etc. The results indicated that the ceramics were composed of two crystalline phases MgTa2O6 and Mg4Ta2O9 in the composition range studied, and that the dielectric properties ln epsilon, 1/Qf, and (f) changed proportionally to the fraction of main crystal phases, which meet perfectly with the mixing model proposed in this study. It is obvious that the proportion of the two crystal phases could be precisely controlled by x, and thereby, the dielectric properties can be conveniently and precisely tailored. Our research provided a new microwave dielectric ceramic with the composition of 2MgO-Ta2O5, which has an ultrahigh Qf value (211 000 GHz), low dielectric constant epsilon(r) (19.9), and near zero temperature coefficient of resonant frequency (f) (8 ppm/degrees C).
学科主题	Materials Science, Ceramics
出版者	WILEY
WOS记录号	WOS:000431661300037
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/24846]
专题	中国科学院上海硅酸盐研究所
作者单位	1.Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Inorgan Funct Mat & Device, Shanghai, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Chongqing Univ Technol, Dept Mat, Chongqing, Peoples R China
推荐引用方式 GB/T 7714	Dang, Mingzhao,Ren, Haishen,Yao, Xiaogang,et al. Investigation of phase composition and microwave dielectric properties of MgO-Ta2O5 ceramics with ultrahigh Qf value[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2018,101(7):3026, 3031.
APA	Dang, Mingzhao.,Ren, Haishen.,Yao, Xiaogang.,Peng, Haiyi.,Xie, Tianyi.,...&Luo, Lan.(2018).Investigation of phase composition and microwave dielectric properties of MgO-Ta2O5 ceramics with ultrahigh Qf value.JOURNAL OF THE AMERICAN CERAMIC SOCIETY,101(7),3026.
MLA	Dang, Mingzhao,et al."Investigation of phase composition and microwave dielectric properties of MgO-Ta2O5 ceramics with ultrahigh Qf value".JOURNAL OF THE AMERICAN CERAMIC SOCIETY 101.7(2018):3026.