CuO掺杂(Ba,Ca)(Ti,Sn)O_(3)陶瓷的结构与压电性能  

Structure and Piezoelectric Properties of CuO-doped(Ba,Ca)(Ti,Sn)O_(3) Ceramics

作　　者：彭萍 谭礼涛 PENG Ping;TAN Litao(School of Materials Science and Engineering,Fujian University of Technology,Fuzhou 350108,China)

机构地区：[1]福建理工大学材料科学与工程学院,福州350108

出　　处：《无机材料学报》2024年第10期1100-1106,共7页Journal of Inorganic Materials

基　　金：国家自然科学基金青年项目(52102125);福建省自然科学基金青年基金(2021J05223);中国科学院无机功能材料与器件重点实验室开放基金(KLIFMD202101);华东理工大学超细材料制备与应用教育部重点实验室开放基金(JKD01231702);福建理工大学科研启动基金(GY-Z21068)。

摘　　要：(Ba,Ca)(Ti,Sn)O_(3)(BCTS)压电陶瓷具有优异的压电性能,在压电传感器、换能器领域表现出巨大的应用潜力。其烧结温度非常高(通常在1450℃以上),导致其在实际应用中受到限制。为了降低烧结温度,本研究以(Ba_(0.95)Ca_(0.05))(Ti_(0.90)Sn_(0.10))O_(3)为基体,选择CuO作为烧结助剂,通过传统固相烧结法制备BCTS-xCuO压电陶瓷,系统研究CuO含量对BCTS陶瓷的烧结温度、结构及介电、压电性能的影响规律。研究发现,加入CuO后,陶瓷主相为钙钛矿结构,存在少量杂相,可能是Ba_(2)TiO_(4)和Ba_(2)Cu_(3)O_(5.9)。CuO掺杂能有效将陶瓷的烧结温度从1480℃降低至1360℃,提高压电陶瓷的相对致密度,增大陶瓷的平均晶粒尺寸。当x=0.03时,陶瓷获得最高相对致密度(98.7%)和最大平均晶粒尺寸(22.5μm),同时获得最优异的电学性能:压电系数d_(33)=573 pC/N,机电耦合系数k_(p)=36%,相对介电常数ε_(r)=9467,介电损耗tanδ=0.021。与其他低温烧结的BaTiO_(3)基陶瓷相比,x=0.03陶瓷组分在低烧结温度下具有更高的d33,表现出优异的综合性能。本研究结果表明,CuO掺杂可有效降低BCTS陶瓷的烧结温度,提高压电性能,为其在压电器件领域的应用提供指导。(Ba,Ca)(Ti,Sn)O_(3)(BCTS)piezoelectric ceramics exhibit excellent piezoelectric properties and show great potential in the fields of piezoelectric sensors and transducers.However,their sintering temperature is very high,typically exceeding 1450℃,which limits their practical applications.In order to lower the sintering temperature,the oxide CuO was added into(Ba_(0.95)Ca_(0.05))(Ti_(0.90)Sn_(0.10))O_(3) ceramics as a sintering aid in this work.Herein,BCTS-xCuO piezoelectric ceramics were prepared by the conventional solid-state sintering method,and the influence of CuO content on the sintering temperature,structure as well as dielectric and piezoelectric properties of BCTS ceramics was investigated systematically.After adding CuO,the perovskite crystal structure was mainly formed in BCTS ceramics,with a small amount of secondary phases,which may be Ba_(2)TiO_(4) and Ba_(2)Cu_(3)O_(5.9).Moreover,it was found that CuO doping can effectively reduce the sintering temperature of ceramics from 1480℃to 1360℃and improve the relative density of piezoelectric ceramics.The highest relative density(98.7%)and maximum average grain size(22.5μm)were obtained at x=0.03.Hence,the optimal electrical properties were obtained at x=0.03 with piezoelectric coefficient d_(33)=573 pC/N,planar electromechanical coupling coefficient kp=36%,relative permittivityεr=9467,and dielectric loss tanδ=0.021.Compared with other reported low-temperature sintered BaTiO_(3)-based ceramics,the x=0.03 component ceramics in this study obtained higher d_(33) at a low sintering temperature,showing excellent comprehensive properties.In conclusion,this work demonstrates that CuO doping can successfully reduce the sintering temperature and optimize the piezoelectric properties of BCTS ceramics.

关 键 词：无铅压电陶瓷 压电性能 低温烧结 

分 类 号：TQ174[化学工程—陶瓷工业]