SrCO_3掺杂对PMN-PMnN-PZT-Ce压电陶瓷储能及介电弛豫性能的影响  

Effect of SrCO_3 Dopant on Energy Storage and Dielectric Relaxation Properties of PMN-PMnN-PZT-Ce Piezoelectric Ceramics

作　　者：张浩[1] 郑德一 胡顺敏[1] 彭贵贵 程程[1] 张静[1] 

机构地区：[1]贵州大学材料与冶金学院,贵阳550000

出　　处：《材料导报》2017年第6期11-15,共5页Materials Reports

基　　金：国家自然科学基金(51202038);贵州省国际科技合作计划项目(黔科合外G字[2012]7010号);贵州省工业攻关项目(黔科合GY字(2013)3075)

摘　　要：通过铌铁矿先驱法制备了Pb(Mg_(1/3)Nb_(2/3))O_3-Pb(Mn_(1/3)Nb_(2/3))O_3-PbZrO_3-PbTiO_3+0.3%CeO_2(质量分数)+xSrCO_3(PMN-PMnN-PZT-Ce-xSr,x=0.00,0.03,0.05,0.07)四元系压电陶瓷,研究了SrCO_3含量的变化对Pb(Mg_(1/3)Nb_(2/3))O_3-Pb(Mn_(1/3)-Nb_(2/3))O_3-PbZrO_3-PbTiO_3+0.3%CeO_2(质量分数)(PMN-PMnN-PZT-Ce)压电陶瓷相结构、储能密度以及弛豫行为的影响。通过XRD表明,样品为单一稳定的钙钛矿结构,并且存在准同晶界(MPB);当x=0.07时,在外加电场60kV/cm下取得较好的储能性能:储能密度W1=0.31J/cm^3,储能效率η=0.47;通过修正Curie-Weise定律,较好地描述了陶瓷弥散相变的特征,弥散相变系数γ随着Sr^(2+)掺杂量的增加而增加。当x=0.07时,γ取得最大值1.972 8,此时弛豫现象最明显。A series of Pb（Mg1/3Nb2/2）O3-Pb（Mn1/3Nb2/s）Os-PbZrOs-PbTiO3 ＋0. 3%CeO2 （in mass fraction） ＋xSr （PMN- PMnN-PZT-Ce-xSr, x=0. 00,0. 03,0. 05,0. 07） ceramics were prepared by a columbite precursor method, and phase structures, energy-storage properties and relaxation behaviors of the as-prepared PMN-PMnN-PZT ceramics varied in SrCOs contents were stu- died. According to the results by X-ray diffraction, all samples are a single perovskite phase and possess a morphotropic phase boundary （MPB）. The sample with ：r= 0. 07 obtained satisfactory energy storage performance, as its energy storage density and energy storage efficiency were 0. 31 J/cms and 0. 47, respectively under 60 kV/cm electric field. A modified Curie-Weiss law can describe the diffuse phase transition properly, and when Sr addition increases the dispersion coefficient of phase transformation 7 increases. The sample with x=0. 07, ） reaches a maximum value of 1. 972 8, indicating that the dielectric relaxation behavior of ceramic is more evident.

关 键 词：压电陶瓷 相结构 储能性能 介电弛豫 弥散相变 

分 类 号：TB321[一般工业技术—材料科学与工程]