中南大学学报（自然科学版）2012，Vol.43Issue(4)：1290-1294,5.
准同型相界内KNN-LS-BF无铅压电陶瓷的烧结与压电性能
Sintering and piezoelectric properties of KNN-LS-BF lead-free ceramics among MPB composition
摘要
Abstract
0.956K0.5Na0.5NbO3-0.004BiFeO3-0.04LiSbO3(0.956KNN-0.004BF-0.04LS) ceramics among the morpho-tropic phase boundary (MPB) composition were prepared by traditional ceramic processing. The effects of sintering temperature on the microstructure, piezoelectric, dielectric properties and phase transformation temperature of ceramics were investigated. The results show that the structure of all samples is a single perovsltite structure, and also show the coexistence of little orthorhombic and main tetragonal phases, especially when the sintering temperature is below 1 100 'C. The suitable increasing of sintering temperature promotes the densification of ceramics. With the increase of the sintering temperature, the piezoelectric properties of ceramics first increase evidently and then decrease while the dielectric loss first decreases and then increases. The sintering temperature has a little effect on θ0-t and θc, When sintered at 1 100 ℃, 0.956KNN-0.004BF-0.04LS ceramics have good electric properties: d33= 297 pC/N, kp=54%, θC=355 ℃, tan δ=2.6%, which indicates that the ceramics have a promising application in many fields.关键词
无铅压电陶瓷/K0.5Na0.5NbO3/烧结温度/压电性能Key words
lead-free piezoelectric ceramic/ K0.5Na0.5NbO3/ sintering temperature/ piezoelectric property分类
信息技术与安全科学引用本文复制引用
江民红,刘心宇,陈国华,龚晓斌,周昌荣..准同型相界内KNN-LS-BF无铅压电陶瓷的烧结与压电性能[J].中南大学学报（自然科学版）,2012,43(4):1290-1294,5.基金项目
国家自然科学基金资助项目(51102056) （51102056）
广西自然科学基金重点项目(2010GXNSFD013007) （2010GXNSFD013007）
广西教育厅科研项目(201012MS085) （201012MS085）
广西信息材料重点实验室主任基金资助项目(桂科能0710908-15-Z) （桂科能0710908-15-Z）
