硅酸盐学报2011，Vol.39Issue(12)：1953-1957,5.
（1-x）Bi4Ti3O12–xK0.5Na0.5NbO3铋层状陶瓷的结构与性能
Structure and Electrical Properties of （1-x）Bi4Ti3O12-xK0.5Na0.5NbO3 Bismuth Layer-structured Ceramics
摘要
Abstract
Bismuth layer-structured piezoelectric ceramics （1-x）Bi4Ti3O12-xK0.5Na0.5NbO3（BIT-KNN,x=0,0.05,0.10,0.15,0.20,0.30） were prepared by solid state reaction method. Crystal structure and electrical properties of BIT–KNN ceramics were characterized by various methods including X-ray diffraction and scanning electron microscopy. Results indicate that BIT–KNN materials possess a single orthorhombic structure. After KNN doping, grain size becomes larger and Curie temperature decreases. Piezoelectric properties of BIT-based ceramics were improved by addition of the KNN. With the increasing of the KNN dosage, piezoelectric properties d33 increase and then decrease. Relative dielectric properties exhibit contrasting properties. When x=0.10, the ceramic achieves an opti- mum performance： d33=11 pC/N, relative density ρ=96.5%, planar electromechanical coupling coefficient kp=4.52%, relative dielectric constant ε r=151, dielectric loss tan δ=0.45%, and Curie temperature θ C=619 ℃.关键词
铋层状/压电陶瓷/电性能Key words
bismuth layer-structured/piezoelectric ceramic/electrical property分类
化学工程引用本文复制引用
涂娜,江向平,傅小龙,杨庆,陈超..（1-x）Bi4Ti3O12–xK0.5Na0.5NbO3铋层状陶瓷的结构与性能[J].硅酸盐学报,2011,39(12):1953-1957,5.基金项目
国家自然科学基金(50862005,51062005,91022027) （50862005,51062005,91022027）
江西省教育厅(GJJ11197) （GJJ11197）
江西省高等学校"先进陶瓷材料"科技创新团队及江西省主要学科学术和技术带头人培养对象计划(201ODD00800)资助项目. （201ODD00800）
