BiYbO_3-BaTiO_3-LiNbO_3陶瓷微结构与性能研究  

Study on Microstructure and Properties of BiYbO_3-BaTiO_3-LiNbO_3 Ceramics

作　　者：张小娅 曹建威 陈刚[1] 符春林[1] 蔡苇 高荣礼[1] 

机构地区：[1]重庆科技学院冶金与材料工程学院,重庆401331

出　　处：《压电与声光》2017年第5期741-745,共5页Piezoelectrics & Acoustooptics

基　　金：重庆科技学院大学生科技创新基金资助项目;重庆市前沿基础与研究基金资助项目(CSTC2016jcyjA0175);重庆市教委科学技术研究基金资助项目(KJ1501310;KJ1501318);国家自然科学基金资助项目(51372283;51402031;61404018);院士专家工作站基金资助项目(CKYS201504)

摘　　要：研究了不同成分的BiYbO_3-BaTiO_3-LiNbO_3陶瓷的晶体结构、表面形貌与介电、铁电性能。研究结果表明,BiYbO_3-BaTiO_3-LiNbO_3预烧粉体均为纯相,烧结后试样中存在少量的Bi2O_3和Yb_2TiO_5第二相,其组织致密、多边形状晶粒中有少量细小的球状晶粒存在。0.25BY-0.7BT-0.05LN陶瓷的介电常数最大(ε_(rmax)=280),剩余极化强度相对较大,P_r=0.47μC/cm2,矫顽场强E_c=19.04kV/cm。0.1BY-0.8BT-0.1LN陶瓷的剩余极化强度最大(P_(rmax)=0.83μC/cm^2),矫顽场强E_c=17.86kV/cm。The crystal structure,surface morphology,dielectric and ferroelectric properties of BiYbO_3-BaTiO_3-LiNbO_3 ceramics with different contents were studied in this paper.The results show that the pre-sintering powder can obtain the pure perovskite phase and a little Bi_2O_3 and Yb_2TiO_5 as second phases appear in the sintered samples.The microstructure of BiYbO_3-BaTiO_3-LiNbO_3 ceramics is dense and a little small sphere grains distributes along the grain boundary of the polygonal grains.The 0.25 BY-0.7 BT-0.05 LN ceramic has maximum dielectric constant ofε_（rmax）=280,and has a larger remnant polarization of P_r= 0.47μC/cm^2 and the coercive field of E_c= 19.04 kV/cm,while the 0.1 BY-0.8 BT-0.1 LN ceramic has maximum remnant polarization of Prmax=0.83μC/cm^2 and the coercive field E_c=17.86 kV/cm.

关 键 词：BiYbO3-BaTiO3-LiNbO3陶瓷 晶体结构 表面形貌 介电性能 铁电性能 

分 类 号：TN04[电子电信—物理电子学]