增材制造钛酸钡压电陶瓷的高温烧结与极化工艺研究  

High-Temperature Sintering and Polarization Process of Additive Manufacturing Barium Titanate Piezoelectric Ceramics

作　　者：刘凯[1,2] 鲁超[2] 贺俊超 李天杨 沈春华 闫春泽[4] 史玉升[4] 孙华君[1] LIU Kai;LU Chao;HE Junchao;LI Tianyang;SHEN Chunhua;YAN Chunze;SHI Yusheng;SUN Huajun(State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;The Center for Materials Research and Analysis,Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory of Material Processing and Die&Mould Technology,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070 [2]武汉理工大学材料科学与工程学院,武汉430070 [3]武汉理工大学材料分析与测试中心,武汉430070 [4]华中科技大学材料成形与模具技术国家重点实验室,武汉430074

出　　处：《硅酸盐通报》2024年第5期1772-1783,共12页Bulletin of the Chinese Ceramic Society

基　　金：国家重点研发计划青年科学家项目(2021YFB3703100);国家自然科学基金(52202066);2023年湖北省重大攻关项目(JD)(2023BAA023);装备预研教育部联合基金(8091B032105)。

摘　　要：为提高增材制造BaTiO_(3)压电陶瓷的综合性能,本文研究了BaTiO_(3)压电陶瓷的浆料剪切变稀特性及数字光处理(DLP)成型特性,揭示了DLP成型BaTiO_(3)压电陶瓷坯体在不同烧结温度条件下的致密化机制,探索了极化方向对DLP成型BaTiO_(3)陶瓷压电性能的影响规律。结果表明,调节高温烧结与极化工艺,可以在一定程度上改善DLP增材制造BaTiO_(3)压电陶瓷的电学性能。当烧结温度为1420℃、保温时间为2 h时,压电系数d_(33)最大,为163.4 pC/N,样品层间结合紧密,晶粒尺寸均匀。当Z轴与极化方向夹角由0°变为90°时,相对介电常数εr和d_(33)分别提高了29.37%和27.01%。当固含量为80%(质量分数)、烧结温度为1420℃、Z轴与极化方向夹角为90°时,样品d_(33)最大,达到182.4 pC/N。In order to improve the comprehensive performance of BaTiO_(3)piezoelectric ceramics fabricated by additive manufacturing,the slurry shear thinning characteristics and digital light processing(DLP)forming characteristics of BaTiO_(3)piezoelectric ceramics were studied in this paper.The densification mechanism of BaTiO_(3)piezoelectric ceramics green body formed by DLP under different sintering temperature conditions was revealed,and the influence of polarization direction on the piezoelectric properties of BaTiO3 ceramics formed by DLP was explored.The results show that the electrical properties of BaTiO3 piezoelectric ceramics fabricated by DLP additive manufacturing can be improved to a certain extent by adjusting the high temperature sintering and polarization process.When the sintering temperature is 1420℃and the holding time is 2 h,the piezoelectric coefficient d_(33)is the largest,which is 163.4 pC/N.The sample layers are tightly bonded and the grain size is uniform.When the angle between Z axis and polarization direction is changed from 0°to 90°,the relative dielectric constantεr and d_(33)are increased by 29.37%and 27.01%,respectively.When the solid content is 80%(mass fraction),the sintering temperature is 1420℃,and the angle between Z axis and polarization direction is 90°,the sample d_(33)is the largest,reaching 182.4 pC/N.

关 键 词：压电陶瓷 钛酸钡 增材制造 数字光处理 烧结 极化 

分 类 号：TQ174[化学工程—陶瓷工业]