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Structure instability and high microwave dielectric permittivity of nonstoichiometric(Sr_(0.4)Ce_(0.4))_(1-x)Nd_(x)Ti_(0.8)Mg_(0.2)O_(3)system for wireless communication

查看全文 作　　者：Burhan [1,2,3]Ullah;Wen [1,2]Lei;Xianwei [4]Wang;Bihui [4]Zhang;Wen-Zhong [1,2]Lu 高影响力作者 机构地区：[1]School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan,430074,China;[2]Key Lab of Functional Materials for Electronic Information(B),Ministry of Education,Wuhan,430074,China;[3]Department of Physics,Islamia College University Peshawar,Pakistan;[4]Laboratory of Functional Materials,School of Physics,Henan Normal University,Xinxiang,453007,China高影响力机构 出　　处：《Journal of Materiomics》索引2021年第7卷第1期,共9页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China(No.51772107);the Innovation Team Program of Hubei Province,China[No.2019CFA004]. 摘　　要：(Sr_(0.4)Ce_(0.4))_(1-x)Nd_(x)Ti_(0.8)Mg_(0.2)O_(3)[(SC)NdTMgO3,x=0.1-0.4]non-stoichiometric system were obtained through conventional solid-state synthesis technique.All perovskite peaks were attributed to either single(x<0.3)and/or mixed(x=0.4)like phases.A solid solution of cubic structure was obtained for x<0.2,however,for x>0.3,the(SC)NdTMgO3 compound,exhibits structure instability and(200)/(310)peaks splitting.The peaks splitting indicates cubic(C-phase)to tetrogonal(T-phase)structure phase transition.All ceramic samples appear nearly dense,presenting a non-uniform grain size distribution.The observed trend of the microwave dielectric properties(er,tf,Q×f)is mainly related to the formation of structure phase transition,packing fraction,relative density and ionic polarizability.A key microwave(MW)dielectric properties of er=53,Q×f=26,700 GHz and tf=+2.8 pmm/℃could be obtained for composition with x=0.4. 关 键 词：(SC)NdTMgO_(3)system Phase transition Microwave dielectric
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