烧结温度对CuO掺杂KNN基压电陶瓷物性的影响  

Effect of Sintering Temperature on the Performance of CuO Doped KNN Based Ceramics

作　　者：邵斌 Shao Bin(School of Electromechanical Engineering Jiangxi Vocational and Technical College of Communications,Nanchang Jiangxi 330013,China)

机构地区：[1]江西交通职业技术学院机电工程学院,江西南昌330013

出　　处：《山西冶金》2024年第5期3-6,24,共5页Shanxi Metallurgy

基　　金：2022年江西省教育厅科学技术研究项目(GJJ2205219)。

摘　　要：采用传统固相反应法制备了CuO掺杂的KNN+1%ZnO+1.5%CuO无铅压电陶瓷,研究了不同烧结温度(940℃,950℃,960℃,970℃,980℃)对陶瓷样品的相结构、微观结构、介电性能、压电性能和铁电性能的影响。研究结果,KNN+1%ZnO+1.5%CuO压电陶瓷样品的致密度随着烧结温度的升高而提高,所有陶瓷样品的相结构均为纯钙钛矿结构,当烧结温度为960℃时获得了性能最优的陶瓷样品,介电常数ε_(r)=258,介电损耗tanδ=0.037,平面机电耦合系数k_(p)=0.313,压电常数d_(33)=85 pC/N,机械品质因数Q_(m)=888,剩余极化强度P_(r)=23.36μC/cm^(2),矫顽场E_(c)=0.77 kV/mm。The CuO doped KNN+1%ZnO+1.5%CuO lead-free piezoelectric ceramics were prepared by the solid-state reaction method.The effect of different sintering temperature(940℃,950℃,960℃,970℃,980℃)on phase structure,microstructure,dielectric,piezoelectric and ferroelectric properties for ceramic samples was investigated.The results showed that the density of KNN+1%ZnO+1.5%CuO ceramics was increased with the increasing of sintering temperature.All the ceramic samples were pure perovskite phase.When the sintering temperature was 960℃,the best performance of piezoelectric ceramic was obtained,ε_(r)=258,tanδ=0.037,k_(p)=0.313,d_(33)=85 pC/N,Q_(m)=888,P_(r)=23.36μC/cm^(2),E_(c)=0.77 kV/mm.

关 键 词：无铅压电陶瓷 铌酸钾钠 烧结温度 压电性能 

分 类 号：TM282[一般工业技术—材料科学与工程]