烧结工艺参数对KNN基陶瓷性能的影响  

Effect of Process Parameters for Sintering on the Performance of CeO_2 Doped KNN Based Ceramics

作　　者：王文蕊 程花蕾[1] 周万城[1] 

机构地区：[1]西北工业大学材料学院,凝固技术国家重点实验室,陕西西安710072 [2]东南大学材料科学与工程学院,江苏南京211189

出　　处：《压电与声光》2017年第2期252-255,共4页Piezoelectrics & Acoustooptics

基　　金：国家青年科学基金资助项目(No 21501007);陕西省教育厅专项基金资助项目(No 15JK1021);宝鸡文理学院重点基金资助项目(No ZK15044)

摘　　要：采用传统固相烧结法制备了CeO_2掺杂的0.97(K_(0.5)Na_(0.5))NbO_3-0.03Bi(Zn_(2/3)Nb_(1/3))O_3-1.0%CeO_2(0.97KNN-0.03BZN-1.0CeO_2,摩尔分数)无铅铁电陶瓷。研究了1 130℃烧结温度下,不同保温时间(1h、2h、4h)和升温速率(2℃/min、5℃/min)对陶瓷样品相组成、显微结构及介电和铁电性能的影响。研究发现,当烧结条件为1 130℃,保温4h,升温速率2℃/min时,0.97KNN-0.03BZN-1.0CeO_2陶瓷试样较致密,表现出较优异的介电、铁电性能,介电常数为1 418(100kHz),介电损耗低于2%,并表现出弛豫铁电体特性。The CeO2 doped 0.97（K（0.5）Na（0.5））NbO3-0.03Bi（Zn（2/3）Nb（1/3））O3-1.0mol%CeO2（0.97KNN-0.03BZN-1.0CeO2）lead-free ferroelectric ceramics were prepared by the solid-state reaction method.The effects of different holding time（1h,2hand 4h）and heating rate（2 ℃/min,5 ℃/min）on the phase composition,microstructure,dielectric and ferroelectric properties of the samples at the sintering temperature of 1130℃ was studied.The results showed that the 0.97KNN-0.03BZN-1.0CeO2 ceramics samples were compact and exhibited excellent dielectric and ferroelectric properties when being sintered at 1 130 ℃,held for 4hwith heating rate of 2 ℃/min.Its dielectric permittivity was 1 418（100kHz）,and the dielectric loss was less than 2%.Additionally,the characteristics of relaxation ferroelectric were exhibited.

关 键 词：铌酸钾钠 保温时间 升温速率 介电性能 弛豫铁电体 

分 类 号：TM282[一般工业技术—材料科学与工程]