MnO_(2)掺杂(K_(0.48)Na_(0.52))(Nb_(0.98)Sb_(0.02))O_(3)无铅压电陶瓷的研究  

Study on MnO_(2)doped(K_(0.48)Na_(0.52))(Nb_(0.98)Sb_(0.02))O_(3)lead-free piezoelectric ceramics

作　　者：张军 任奕菲 李向东 ZHANG Jun;REN Yi-fei;LI Xiang-dong(Research Department of Medical Devices,Dongguan HEC Research Institute,Dongguan 523867,China;School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]东莞东阳光研究院医疗器械研究所,广东东莞523867 [2]华中科技大学材料科学与工程学院,湖北武汉430074

出　　处：《西南民族大学学报(自然科学版)》2024年第6期626-635,共10页Journal of Southwest Minzu University(Natural Science Edition)

基　　金：国家重点研发计划基金资助项目(2021YFB3702002);广东省基础与应用基础研究基金资助项目(181003)。

摘　　要：采用固相反应法制备(K_(0.48)Na_(0.52))(Nb_(0.98)Sb_(0.02))O_(3)+x%MnO_(2)(x=0.25、0.5、0.75、1.00、1.5、2.0)压电陶瓷.通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)表征陶瓷的物相晶型、微观形貌,测试样品的压电常数(d33)、介电常数(εr)、介电损耗(tanδ)及其温度稳定性.研究MnO_(2)掺杂量及烧结温度对陶瓷性能及高温稳定性的影响.结果表明,掺杂适量MnO_(2)可以改变(K_(0.48)Na_(0.52))(Nb_(0.98)Sb_(0.02))O_(3)陶瓷的相结构,由单一相转变为多相共存,同时可以明显提高陶瓷的致密度;烧结温度为1080℃、x=1.0时,ε_(r)=986.34;烧结温度为1040℃、x=0.5时,样品具有更优综合性能:d33=135 pC/N,tanδ=0.22%.并且,样品在25~180℃范围内,压电性能具有很好的温度稳定性.(K_(0.48)Na_(0.52))(Nb_(0.98)Sb_(0.02))O_(3)+x%MnO_(2)(x=0.25,0.5,0.75,1.00,1.5,2.0)piezoelectric ceramics were syn-thesized by solid state reaction method.The phase structure and microstructure of ceramics were characterized by X-ray diffrac-tion(XRD),scanning electron microscopy(SEM),and energy dispersive spectroscopy(EDS).The piezoelectric constant(d33),dielectric constant(εr),dielectric loss(tanδ),temperature stability of samples were tested.The effects of MnO_(2)doping amount and sintering temperature on properties and high-temperature stability were studied.The results indicated that doping an appro-priate amount of MnO_(2)could change the phase structure of(K_(0.48)Na_(0.52))(Nb_(0.98)Sb_(0.02))O_(3)ceramics from single phase to coexis-tence multiphase,and increase the density of the ceramics.When x=1.0 and sintered at 1080℃,ε_(r)=986.34;x=0.5 and sintered at 1040℃,the samples exhibited better performance:d33=135 pC/N,tanδ=0.22%.Moreover,the piezoelectric per-formance of samples had a good temperature stability within the range of 25~180℃.

关 键 词：固相反应 掺杂 压电陶瓷 致密度 温度稳定性 

分 类 号：TQ174[化学工程—陶瓷工业]