首页|Dielectric responses and structure-property relationships of Ca1-xBaxWO4 composite microwave dielectric ceramics
Dielectric responses and structure-property relationships of Ca1-xBaxWO4 composite microwave dielectric ceramics
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NSTL
Elsevier
? 2022Ca1-xBaxWO4 (x = 0–0.25, CBWO) composite microwave dielectric ceramics were obtained after sintering at 1200 °C for 4 h. X-ray diffraction and X-ray photoelectron spectroscopy were used to determine their complex phase structures. The lattice vibrational properties were revealed by Raman scattering and Fourier-transform infrared (FTIR) spectroscopy. The Raman spectra showed that phase-pure CaWO4 had eight active vibrational modes when x = 0.15–0.25. A new vibrational mode appeared near 927 cm?1, which was attributed to BaWO4. The intrinsic properties were fitted and simulated by the four-parameter semi-quantum model according to the FTIR spectra. The low-frequency vibrational modes made a greater contribution to the intrinsic properties than the high-frequency modes. Structure-property relationships of the CBWO ceramics were obtained using Raman spectroscopy, and their dielectric responses were elucidated. The CBWO ceramic at x = 0.25 had excellent dielectric properties with εr = 7.43 and Q × f = 56,929 GHz.
Wang X.、Xu Y.、Zhang L.、Shen Y.、Shi F.、Lv J.、Zhou H.、Zhou D.、Song K.、Guo H.
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Key Laboratory of Processing and Testing Technology of Glass & Functional Ceramics of Shandong Province School of Materials Science and Engineering Qilu University of Technology (Shandong Academy of Sciences)
School of Material Science and Engineering Shandong University of Science and Technology
Guangxi Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-ferrous Metal and Featured Materials School of Materials Science and Engineering Guilin University of Technology
Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education and International Center for Dielectric Research Xi'an Jiaotong University
College of Electronic Information Hangzhou Dianzi University
NSTL
Elsevier
