Crystal structures, dielectric properties, and lattice vibrational characteristics of (1-x)CaWO4-xTiO(2) composite ceramics

doi:10.1016/j.ceramint.2019.10.092

SIC OpenIR

	Crystal structures, dielectric properties, and lattice vibrational characteristics of (1-x)CaWO4-xTiO(2) composite ceramics
	Lv, JQ; Xiao, EC; Li, XH; Dong, XL; Chen, Y; Yue, ZX; Shi, F
	2020-02-15
Source Publication	CERAMICS INTERNATIONAL
ISSN	0272-8842
Issue	3 Pages:3715
Subtype	Article
Abstract	(1-x)CaWO4-xTiO(2) (CWT) ceramics were fabricated by conventional solid-state sintering method at 1200 degrees C for 4 h. X-ray diffraction data show that CaWO4 and TiO2 coexist as composite ceramics and Rietveld refinement reveals the change in crystal structures of CWT system. There are seven Raman vibrational modes for CaWO4, two Raman modes for TiO2, and eight infrared vibrational modes for CaWO4, whose intensities decrease with increasing TiO2 content. The theoretical properties obtained from four-parameter semiquantum model coincide with those calculated from C-M and damping equations. The structure-property relationships of CWT system were established based on the lattice vibrational modes. When x = 0.15, the sample achieves the optimum dielectric properties with epsilon(r) = 10.86, Q x f = 16046 GHz (f = 15.51 G), tau(f) = -15.99 ppm/degrees C.
DOI	10.1016/j.ceramint.2019.10.092
WOS Keyword	PEROVSKITE CERAMICS ; MICROWAVE ; TEMPERATURE ; SPECTROSCOPY ; SPECTRA
Language	英语
WOS Research Area	Materials Science
Publisher	ELSEVIER SCI LTD
Citation statistics
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/28299
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Lv, JQ,Xiao, EC,Li, XH,et al. Crystal structures, dielectric properties, and lattice vibrational characteristics of (1-x)CaWO4-xTiO(2) composite ceramics[J]. CERAMICS INTERNATIONAL,2020(3):3715.
APA	Lv, JQ.,Xiao, EC.,Li, XH.,Dong, XL.,Chen, Y.,...&Shi, F.(2020).Crystal structures, dielectric properties, and lattice vibrational characteristics of (1-x)CaWO4-xTiO(2) composite ceramics.CERAMICS INTERNATIONAL(3),3715.
MLA	Lv, JQ,et al."Crystal structures, dielectric properties, and lattice vibrational characteristics of (1-x)CaWO4-xTiO(2) composite ceramics".CERAMICS INTERNATIONAL .3(2020):3715.

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