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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.
2019-12-31
Source PublicationINTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
ISSN1546-542X
SubtypeArticle; Early Access
AbstractGehlenite-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.
Keyword5G microwave ceramics silicate dielectrics
DOI10.1111/ijac.13414
WOS KeywordIONS ; OCCUPATION ; BEHAVIOR
Language英语
WOS Research AreaMaterials Science
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27494
Collection中国科学院上海硅酸盐研究所
Recommended Citation
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).
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