新型铁电固溶体铌镥酸铅–铌镁酸铅–钛酸铅的制备与表征  

Preparation and Characterization of A New Ferroelectric Ternary Solid Solution Pb(Lu_(1/2)Nb_(1/2))O_3-Pb(Mg_(1/3)Nb_(2/3))O_3-PbTiO_3

作　　者：刘颖[1,2] 赖发春[1] 黄志高[1] 沈东全[2] 龙西法[2] 

机构地区：[1]福建师范大学物理与能源学院,福州350117 [2]中国科学院福建物质结构研究所,光电材料化学与物理重点实验室,福州350002

出　　处：《无机材料学报》2014年第9期912-916,共5页Journal of Inorganic Materials

基　　金：国家自然科学基金(91122020)~~

摘　　要：采用二次合成法制备了纯相钙钛矿结构三元(0.7-x)Pb(Lu1/2Nb1/2)O3-0.3Pb(Mg1/3Nb2/3)O3-xPbTiO3(PLNPMN-PT)(0.38≤x≤0.46)压电陶瓷,研究了准同型相界(MPB)附近组分的介电、压电和铁电性能。XRD分析表明PLN-PMN-PT存在准同型相界,且准同型相界区域大致为0.40≤x≤0.44。MPB附近组分为0.29PLN-0.3PMN-0.41PT陶瓷具有较高的居里温度和相变温度,分别为270℃和135℃,同时该组分表现出较好的铁电压电性能,压电系数达到460 pC/N,矫顽场为14.8 kV/cm,剩余极化强度Pr为34.6μC/cm2。PLN-PMN-PT材料在压电领域具有潜在的应用前景。Ceramics of （0.7-x）Pb（Lul/2Nb1/2）O3-O.3Pb（Mg1/3Nb2/3）O3-xPbTiO3（PLN-PMN-PT） （0.38 ≤ x ≤ 0.46） ternary system were synthesized by means of a two-step columbite precursor method which can effectively suppress the pyrochlore phase. A morphotropic phase boundary （MPB） region in the ternary systems was found in the range of 0.40 ≤ x ≤0.44 and the electric properties of the compositions near MPB region were investigated. Those compositions within MPB exhibit good comprehensive piezoelectric properties. The ceramic with composition of 0.29PLN- 0.3PMN-0.41PT shows a high Curie temperature of 270℃ and a high rhombohedral-tetragonal phase transition tem- perature of 135℃, whose piezoelectric coefficient d33, coercive field Ec and remnant polarization Pr are found to be 460 pC/N, 14.8 kV/cm and 34.6 μC/cm2, respectively. The large coercive field and high To enable it a promising candidate for application in the piezoelectricity field.

关 键 词：压电陶瓷 固相法 PLMNT 压电性能 

分 类 号：TQ174[化学工程—陶瓷工业]