(Na_(0.4875)K_(0.4875)Li_(0.025))Nb_(0.83-x)Sb_xTa_(0.17)O_3陶瓷的制备及性能  

Preparation and Properties of(Na_(0.4875)K_(0.4875)Li_(0.025))Nb_(0.83-x)Sb_xTa_(0.17)O_3 Ceramics

作　　者：王月芳[1] 仪修杰[1] 潘伟[1] 苏丹[1] 臧国忠[1] 

机构地区：[1]聊城大学材料科学与工程学院,山东聊城252059

出　　处：《聊城大学学报（自然科学版）》2010年第4期68-70,90,共4页Journal of Liaocheng University:Natural Science Edition

基　　金：山东省科技攻关基金资助项目(2008GG10003011);教育部科学技术研究重点项目(208075);山东省优秀中青年科学家奖励基金(2007BS04047);山东省自主创新基金(2007ZZ42);聊城大学大学生创新基金资助项目(SRT08015CL2)

摘　　要：利用传统工艺制备了(Na_(0.487 5)K_(0.487 5)Li_(0.025)Nb_(0.83-x)Sb_xTa_(0.17)O_3无铅压电陶瓷.研究了在Ta定量的情况下,Sb取代对陶瓷的热学性质、结构、介电性能及铁电性能的影响.实验结果表明,陶瓷粉料在650℃左右合成反应基本完成,得到了较适宜的烧结温度;所制备的陶瓷均为单一的钙钛矿结构;样品的居里点(T_c)、正交-四方相变温度(T_(T-O))均随Sb含量的增加而降低;Sb^(5+)的适量加入,能够降低矫顽场E_c,当x=0.07时,剩余极化出现最高值P_(?)=15.4μC/cm^2.（Na_（0.4875）K_（0.4875）Li_（0.025））Nb_（0.83-x）Sb_xTa_（0.17）O_3 ceramics were prepared by conventional oxide solid-solution technique.The effect of Sb content on the thermal properties,crystallographic structure, dielectric and ferroelectric properties were investigated in the certain Ta content.The results showed that the ceramic powder synthesis at 650℃or so basically completed,have been more appropriate for the sintering temperature,and the ceramic with single-phase perovskite structure were formed.With increasing Sb content,both curie temperature（T_c） and orthorhombic-tetragonal phase transition temperature （T_（T-O）） decreased.The moderately addition of Sb^（5＋） decreased E_c,the composition with 7mol%Sb shows high performance of P_r = 15.4μC/cm^2.

关 键 词：无铅压电陶瓷 KLNN 热学性能 铁电性能 

分 类 号：TM22[一般工业技术—材料科学与工程]