摘要
采用传统固相法制备了Sr x(Na0.5Bi0.5)1-x Bi4Ti4O15(SNBT-100x,0≤x≤0.200)层状压电陶瓷。系统地研究了Sr2+对(Na0.5Bi0.5)Bi4Ti4O15基陶瓷的显微结构和电性能的影响。结果表明,所有陶瓷样品均为单一的正交铋层状结构相。适量Sr的掺入能明显改善陶瓷的机械性能和电性能。当x=0.100时,样品获得了最佳性能:机械品质因素Q m=3519,压电常数d33=20 pC/N,平面机电耦合系数k p=5.192%,厚度机电耦合系数k t=6.240%,相对介电常数εr=162,介电损耗tanδ=0.657%,居里温度T C=626℃。此外,热稳定性能研究显示SNBT-10陶瓷具有良好的压电稳定性,具有在高温领域下应用的前景。
Bismuth layer-structured ferroelectric ceramics of Srx（Na0.5Bi0.5）1-xBi4Ti4O15（SNBT-100x, 0 ≤ x ≤ 0.200） were synthesized by traditional solid state reaction. The effects of Sr2＋ addition on the microstructure and electrical properties of ceramics were studied clearly. The results indicated that the ceramics have an orthorhombic bismuth oxide layered structure. The electromechanical and electrical properties of （Na0.sBio.5）Bi4TinO^5-based ceramics were improved by an appropriate amount of Sr addition. When x -- 0. 100, the ceramics achieves an optimum performance., the mechanical quality factor Qm＇-3519, piezoelectric constant d33--20 pC/N, planar electromechanical coupling coefficient kp=5.192 %, thickness electromechanical coupling coefficient kt=6.240 %, dielectric permittivity e r=162, dielectric loss tan5 =0.657 %, Curie temperature Tc -- 626 ~C . Moreover, the thermal annealing studies indicate that the ceramic NBT-10 exhibits high piezoelectric stability, which has the prospect for high-temperature applications.
出处
《中国陶瓷》
CAS
CSCD
北大核心
2013年第9期17-21,共5页
China Ceramics
基金
国家自然科学基金(51262009
51062005
91022027)
江西省自然科学基金(2010GQW0037
2010GQW0038
20114BAB216018
20122BAB202001
20122BAB203019)
江西省主要学科学术和技术带头人培养对象计划项目(2010DD00800)
江西省高等学校"先进陶瓷材料"科技创新团队
江西省教育厅项目(GJJ11204
GJJ10226
GJJ12488)
