SPS中压力对PZT陶瓷准同型相界(MPB)的影响  

Effect of pressure by SPS on PZT ceramics morphotropic phase boundary(MPB)

作　　者：俎达 张宇轩 刘宇飞 吴楠楠 欧阳顺利[1] ZU Da;ZHANG Yuxuan;LIU Yufei;WU Nannan;OU-YANG Shunli(Materials and Metallurgy School,Inner Mongolia University of Science and Technology,Baotou 014010,China;Science School,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [2]内蒙古科技大学理学院,内蒙古包头014010

出　　处：《内蒙古科技大学学报》2023年第1期22-28,共7页Journal of Inner Mongolia University of Science and Technology

基　　金：国家自然科学基金资助项目(11964025,11564031);内蒙古自治区重大基础研究开放课题资助项目(0406091701).

摘　　要：采用放电等离子烧结的方法制备了准同型相界(Morphotropic Phase Boundary,MPB)组分的Pb(Zr_(0.52)Ti_(0.48))O_(3)压电陶瓷,研究了放电等离子的压力对材料中菱面体相和四方相比例的影响.研究结果表明:当在30 MPa下采用放电等离子烧结制备PZT压电陶瓷时,晶体结构处于菱面体相和四方相的混合状态,并且最接近于准同型相界(MPB),其自发极化达到:P s=75.265μC/cm^(-2),压电性能也是所有压力中最高的:d_(33)=136.9 pC/N.证明了压力对于晶体结构有一定的影响,可以调控处在准同型相界附近材料中的菱面体相和四方相的比例,进一步提升材料的性能.Lead zirconate titanate(PZT)ceramics are one of the most widely used piezoelectric functional materials.Optimizing the process to prepare high-quality and high-performance ceramics has been a continuous effort of researchers.In the present work,Pb(Zr_(0.52)Ti_(0.48))O_(3)piezoelectric ceramics with morphotropic phase boundary(MPB)components were prepared by spark plasma sintering method,and the effect of spark plasma sintering pressure on the rhombohedral and tetragonal phases in the material was investigated.The results showed that when the PZT piezoelectric ceramics were prepared by spark plasma sintering at 30 MPa,the crystal structure was in a mixture of rhombohedral and tetragonal phases closest to the morphotropic phase boundary(MPB)with a spontaneous polarization of:P s=75.265μC/cm^(-2)and the highest piezoelectric properties of all pressures:d_(33)=136.9 pC/N.It is demonstrated that the pressure has an effect on the crystal structure,and can regulate the ratio of rhombohedral and tetragonal phases in the material near the morphotropic phase boundary to further enhance the material properties.

关 键 词：PZT陶瓷 准同型相界(MPB) 拉曼光谱 放电等离子烧结 

分 类 号：TM282[一般工业技术—材料科学与工程]