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Phonon characteristics and dielectric properties of BaMoO_(4)ceramic

查看全文 作　　者：En-Cai [1]Xiao;Jianzhu [1]Li;Jing [1]Wang;Chao [1]Xing;Mei [3]Guo;Hengyang [1]Qiao;Qing [1]Wang;Ze-Ming [2]Qi;Gang [3]Dou;Feng [1]Shi 高影响力作者 机构地区：[1]School of Material Science&Engineering,Shandong University of Science and Technology,Qingdao,266590,China;[2]National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei,230029,China;[3]College of Electrical Engineering and Automation,Shandong University of Science and Technology,Qingdao,266590,China高影响力机构 出　　处：《Journal of Materiomics》索引2018年第4卷第4期,共7页高影响力期刊 基　　金：National Natural Science Foundation of China(Grant 11874240);the Taishan Scholarship Project of Shandong Province,China(No.tshw20130956);the Natural Science Foundation of Shandong Province,China(No.ZR2016EMM21);Scientific Research Foundation of Shandong University of Science and Technology for Recruited Talents(No.2016RCJJ002);the Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure(No.SKL201503SIC);the State Key Laboratory of New Ceramic and Fine Processing Tsinghua University(No.KF201811). 摘　　要：BaMoO_(4)ceramic was prepared using a conventional solid-sintering method.It was observed that the sample is a pure BaMoO_(4)with a tetragonal scheelite structure by analyzing X-ray diffraction data.Scanning electron microscopy characterized the dense sample with uniform grains.The phonon modes were analyzed by Raman and Far-infrared reflection spectra,and the phonon characteristics were studied.The intrinsic properties of the sample were calculated by the four-parameter semi-quantum model as well as the Clausius-Mosotti&damping equations,and the results were ofεr=9.388 and tanδ=4.760×10^(-4),εr=9.798 and tanδ=6.445×10^(-4),respectively,which agrees well with the experimental values(εr=9.84,tanδ=5.0×10^(-4)).The contributions to dielectric properties of each mode were investigated,and the results indicate that the external mode(Eu)yield greatest contribution to intrinsic permittivity and loss. 关 键 词：Microwave dielectric ceramic BaMoO^(4) Crystal structure Dielectric properties Phonon characteristics
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