铈和锶复合掺杂对Bi4Ti2.92Nb0.08O12.04高温无铅压电陶瓷的影响  

Cerium and Strontium Co-Doped Bi_4Ti_(2.92)Nb_(0.08)O_(12.04) High Temperature Lead-Free Piezoelectric Ceramics

作　　者：陈云婧 江向平[1] 陈超[1] 李小红[1] 涂娜[1] 

机构地区：[1]景德镇陶瓷学院材料科学与工程学院、江西省先进陶瓷材料重点实验室,江西景德镇333001

出　　处：《硅酸盐学报》2014年第7期826-830,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51062005,91022027);江西省自然科学基金(20132BAB202002);江西省高等学校“先进陶瓷材料”科技创新团队、江西省主要学科学术和技术带头人培养对象计划项目(2010DD00800);江西省教育厅项目(GJJ3630,GJJ3628)

摘　　要：采用固相法制备了Ce和Sr复合掺杂的Bi4Ti2.92Nb0.08O12.04(BTN+0.5x%CeO2+0.5x%SrCO3,0≤x≤1.5,质量分数)铋层状高温无铅压电陶瓷,研究了不同含量的Ce和Sr掺杂对BTN系陶瓷微观结构及电性能的影响。结果表明:样品均为单一的铋层状结构相,Ce和Sr的引入明显提高了陶瓷的压电性能。当掺杂量x=0.9时,样品具有最佳性能:压电常数d33=29pC/N,平面机电耦合系数kp=8.77%,介电损耗tanδ=0.13%,剩余极化强度Pr=15.87μC·cm-2和Curie温度TC=627℃。此外,该组分陶瓷样品具有良好的压电稳定性,表明该材料在高温领域下具有良好的应用前景。Bismuth layer-structured high-temperature lead-＇free piezoelectric ceramics of Ce and Sr co-doped Bi4 Ti2. 92 Nb0.08 O12. 04 （BTN＋0. 5x%CeO2 ＋0. 5x%SrCO3, 0≤x≤1. 5, mass fraction） were fabricated by a solid-state reaction method. The effect of doping content of Ce and Sr on the microstructure and electrical properties of the BTN ceramics was investigated. The re- sults show that all the ceramic samples have a single phase of bismuth oxide layered structure. The piezoelectric activity of the ceramics is improved v/a the modification of Ce and St. The ceramic with the doping content x of 0.9 exhibites the optimum e- lectrical properties, i. e. , the piezoelectric constant d33 of 29 pC/N, planar electromechanical coupling factor kv of 8. 77 %, die- lectric loss tan δ of 0.13% , remanent polarization Pr of 15.87 μC/em2 and the Curie temperature Tc of 627 ℃. In addition, the component ceramic sample possesses a high piezoelectric stability, showing that the ceramic is a potential material for high-tern-perature applications.

关 键 词：铋层状 压电陶瓷 微观结构 电性能 复合掺杂 

分 类 号：TQ174[化学工程—陶瓷工业]