织构化钛酸铋钠基无铅压电陶瓷的制备与性能研究  

Development of textured Bi_(0.5)Na_(0.5)TiO_3 lead-free piezoelectric ceramic

作　　者：徐佩韦 张海波[1] 肖建中[1] 夏风[1] 

机构地区：[1]华中科技大学材料成型与模具技术国家重点实验室,湖北武汉430074

出　　处：《电子元件与材料》2014年第7期8-11,共4页Electronic Components And Materials

基　　金：国家自然科学基金资助项目(No.02-04-110061)

摘　　要：用熔盐法制备了片状Bi4Ti3O12模板,由Bi4Ti3O12片状前驱体制备了Bi0.5Na0.5TiO3(BNT)模板,由模板晶粒生长法制备了织构化0.91Bi0.5Na0.5TiO3-0.06BaTiO3-0.03K0.5Na0.5NbO3陶瓷。研究了Bi4Ti3O12以及Bi0.5Na0.5TiO3两种模板及模板含量对Bi0.5Na0.5TiO3无铅压电体系织构化的影响及织构化陶瓷的压电性能。结果表明Bi0.5Na0.5TiO3模板比Bi4Ti3O12模板更适合用于此体系的织构化,并且,在加入质量分数15%的Bi0.5Na0.5TiO3模板时Bi0.5Na0.5TiO3陶瓷取向度达到87.3%。质量分数5%的BNT模板织构化的陶瓷在6×103 V/mm电场下应变达到0.226%,相较于随机取向陶瓷提高了48.7%。Bi4Ti3O12 platelet templates were obtained by molten salt synthesis, and Bi0.5Na0.5TiO3 templates were synthesized from Bi4Ti3O12 platelet precursor. Textured 0.91Bi0.5Na0.5TiO3-0.06BaTiO3-0.03K0.5Na0.5NbO3 ceramics were fabricated by template grain growth method. Effects of different templates and template contents on textured Bi0.5Na0.5TiO3-based lead-free piezoelectric system and piezoelectricity of textured ceramics were investigated. The results show that BNT templates are more suitable to texture this system than Bi4Ti3O12 templates, and a orientation degree of 87.3% is obtained at 15%（mass fraction） of Bi0.5Na0.5TiO3 templates. Textured ceramics using 5%（mass fraction） of BNT templates showing a strain of 0.226%, achieve 48.7% enhancement compared with randomly oriented counterparts（E=6×103 V/mm）.

关 键 词：无铅压电陶瓷 模板晶粒生长法 Bi4Ti3O12模板 Bi0.5Na0.5TiO3模板 织构化 

分 类 号：TM282[一般工业技术—材料科学与工程]