锆钛酸铅-硅酸盐水泥复合材料的介电和压电性能研究  

Dielectric and piezoelectric properties of leadzirconatetitanate-Portland cement composites

作　　者：李晔[1] 李伟娜 李晶 马瑞彦[1] 贾小盼 LI Ye;LI Weina;LI Jing;MA Ruiyan;JIA Xiaopan(School of Civil Engineering,Hebei College of Engineering and Technology,Shijiazhuang 050091,China;North Engineering Design and Research Institute Co.,Ltd.,Shijiazhuang 050011,China)

机构地区：[1]河北工程技术学院土木工程学院,石家庄050091 [2]北方工程设计研究院有限公司,石家庄050011

出　　处：《功能材料》2023年第5期5119-5123,5132,共6页Journal of Functional Materials

基　　金：国家自然科学基金项目(52005005);河北省高等学校科学技术研究重点项目(ZD2019312)。

摘　　要：选择以锆钛酸铅为功能相,普通硅酸盐水泥P.O 42.5为基体材料,采用压制成型法制备了不同体积分数(30%,40%,50%,60%)功能相的锆钛酸铅-硅酸盐水泥复合材料,研究了复合材料的介电性能、压电性能和机电耦合性能。结果表明,50%以下体积含量的锆钛酸铅的掺杂,可以使锆钛酸铅相互之间接触的概率增大,连通性得到加强,进而促进电流在锆钛酸铅之间的相互传导;随着锆钛酸铅体积量的不断增大,复合材料的介电常数逐渐升高,介电损耗逐渐降低,压电电压常数和压电应变常数逐渐增大,机电耦合系数K_(t)和机械品质因数Q_(m)先增大后减小;当锆钛酸铅的体积分数为50%时,K_(t)最大为0.15%,Q_(m)最大为33.09;当锆钛酸铅体积分数增加至60%时,分布均匀性变差,复合材料的机电耦合性能减弱。Lead zirconate titanate-Portland cement composites with different volume fractions(30%,40%,50%,60%)were prepared by pressing method with lead zirconate titanate as the functional phase and ordinary Portland cement P.O 42.5 as the matrix material,and the dielectric,piezoelectric and electromechanical coupling properties of the composites were studied.The results show that the doping of lead zirconate titanate with volume content below 50%can increase the probability of contact between lead zirconate titanate and enhance the connectivity,thus promoting the mutual conduction of current between lead zirconate titanate.With the increasing volume of lead zirconate titanate,the dielectric constant of the composite gradually increases,the dielectric loss gradually decreases,the piezoelectric voltage constant and piezoelectric strain constant gradually increase,and the electromechanical coupling coefficient K_(t)and the mechanical quality factor Q_(m)first increase and then decrease.When the volume fraction of lead zirconate titanate is 50%,the maximum K_(t)is 0.15%and the maximum Q_(m)is 33.09.When the volume fraction of lead zirconate titanate increases to 60%,the distribution uniformity becomes worse and the electromechanical coupling properties of the composites weaken.

关 键 词：锆钛酸铅 硅酸盐水泥 介电性能 压电性能 机电耦合性能 

分 类 号：TQ172.7[化学工程—水泥工业] TM282[化学工程—硅酸盐工业]