(1-x)Na_(0.5)Bi_(4.5)Ti_(4)O_(15)-xBaTiO_(3)高温铋层状陶瓷的结构与性能研究  

Research on Structure and Properties of (1–x)Na_(0.5)Bi_(4.5)Ti_(4)O_(15)–xBaTiO_(3) High Temperature Bismuth Layer-structured Ceramics

作　　者：涂娜 陈超 陈云婧 江向平 TU Na;CHEN Chao;CHEN Yunjing;JIANG Xiangping(Department of Material Science and Engineering,Jingdezhen Ceramic Institute,Jingdezhen 333403,China)

机构地区：[1]景德镇陶瓷大学材料科学与工程学院,江西景德镇333403

出　　处：《中国陶瓷》2022年第1期16-19,28,共5页China Ceramics

基　　金：国家自然科学基金(51762024,52062018,51862016);江西省自然科学基金(20192BAB206008);江西省教育厅科技项目(GJJ190712)。

摘　　要：采用固相法制备(1-x) Na_(0.5)Bi_(4.5)Ti_(4)O_(15)-xBaTiO_(3)(NBT-BT,x=0,0.05,0.10,0.20,0.30,0.40)高温铋层状压电陶瓷材料。用X射线衍射(XRD)、SEM扫描电镜(SEM),介电和阻抗温谱等测试方法研究了BaTiO_(3)掺杂量对Na_(0.5)Bi_(4.5)Ti_(4)O_(15)陶瓷晶体结构和电性能的影响;结果表明:当x≤0.20时,NBT-BT陶瓷材料为单一的铋层状结构相,居里温度T_(c)逐渐下降;随着BaTiO_(3)掺杂量的增加,压电常数逐渐增大后逐渐减小,介电损耗变化趋势与之相反,当x=0.20时压电常数d_(33)达到最高,17 pC/N,这时介电损耗为最小0.32%。(1-x)Na_(0.5)Bi_(4.5)Ti_(4)O_(15)-xBaTiO_(3)(NBT-BT,x=0,0.05,0.10,0.20,0.30,0.40) high temperature bismuth layered piezoelectric ceramics were prepared by solid state method.The effects of BaTiO_(3)doping on the crystal structure and electrical properties of Na_(0.5)Bi_(4.5)Ti_(4)O_(15)ceramics were studied by X-ray diffraction(XRD),scanning electron microscopy (SEM),temperature-dependent dielectric and impedance spectroscopy.The results show that NBT-BT ceramics are monolithic bismuth layered phase when x is less than 0.20.Curie temperature T_(c) shows a obviously decreasing trend;With the increase of BaTiO_(3) content,piezoelectric constant d;first increases and then decreases,while dielectric loss tan δ shows an opposite trend.When the doping content x is 0.20,d_(33) reaches the maximum value of 17 pC/N,while the loss reaches the minimum value of 0.32%.

关 键 词：铋层状 高温 电性能 

分 类 号：TQ174.756[化学工程—陶瓷工业]