Temperature-dependent dielectric and Raman spectra and microwave dielectric properties of gehlenite-type Ca2Al2SiO7 ceramics

doi:10.1111/ijac.13414

	Temperature-dependent dielectric and Raman spectra and microwave dielectric properties of gehlenite-type Ca2Al2SiO7 ceramics
	Song, Zhengjun; Song, Kaixin; Liu, Bing; Zheng, Peng; Bafrooei, Hadi Barzegar; Su, Weitao; Lin, Huixing; Shi, Feng; Wang, Dawei; Reaney, I. M.
刊名	INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
	2019-12-31
关键词	5G microwave ceramics silicate dielectrics
ISSN号	1546-542X
DOI	10.1111/ijac.13414
文献子类	Article; Early Access
英文摘要	Gehlenite-type Ca2Al2SiO7 ceramics were prepared by the conventional solid-state reaction. Two anomalies were found in the plot of dielectric constant vs temperature, which were associated with space charge polarization. Pure phase crystal structure and no phase transition were observed in the temperature-dependent X-ray diffraction (XRD) patterns and Raman spectra from room temperature (RT) to 900 degrees C. There was relevant relation between Q x f and tau(integral) with the stretching vibrations of Ca-O bond and O-Ca-O bending in CaO8 polyhedron. Excellent microwave dielectric properties (epsilon(r) = 8.86, Q x f = 22 457 GHz, and tau(f) = -51.06 ppm/degrees C) were obtained for Ca2Al2SiO7 sintered at 1440 degrees C in air, which had the potential application to use in microwave and millimeter-wave devices such as capacitors and substrates.
WOS关键词	IONS ; OCCUPATION ; BEHAVIOR
WOS研究方向	Materials Science
语种	英语
出版者	WILEY
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/27494]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 GB/T 7714	Song, Zhengjun,Song, Kaixin,Liu, Bing,et al. Temperature-dependent dielectric and Raman spectra and microwave dielectric properties of gehlenite-type Ca2Al2SiO7 ceramics[J]. INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY,2019.
APA	Song, Zhengjun.,Song, Kaixin.,Liu, Bing.,Zheng, Peng.,Bafrooei, Hadi Barzegar.,...&Reaney, I. M..(2019).Temperature-dependent dielectric and Raman spectra and microwave dielectric properties of gehlenite-type Ca2Al2SiO7 ceramics.INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY.
MLA	Song, Zhengjun,et al."Temperature-dependent dielectric and Raman spectra and microwave dielectric properties of gehlenite-type Ca2Al2SiO7 ceramics".INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY (2019).