%0 Journal Article
%T Sintering Characteristic and Piezoelectric Properties of Lead-free (K0.5 Na0.5)NbO3-LiNbO3 Ceramics
%A TANG Fu-Sheng
%A DU Hong-Liang
%A LIU Dai-Jun
%A LUO Fa
%A ZHOU Wan-Cheng
%J 无机材料学报
%D 2007
%I Science Press
%R 10.3724/sp.j.1077.2007.00323
%X Lead-free (1-x)(1-x)(K0.5Na0.5)NbO3- xLiNbO3 piezoelectric ceramics were prepared by a traditional ceramic processing. The sintering characteristic, the microstructure and electrical properties of (1-x)(K0.5Na0.5)NbO3- LiNbO3 ceramics were investigated. Results show that all specimens exhibit a pure perovskite structure and the phase structure at room temperature transforms from orthorhombic to tetragonal with the increase of LiNbO3.The microstructure of (1-x)(K0.5Na0.5)NbO3- LiNbO3 ceramics exhibits apparent difference due to different amounts of LiNbO3. The sinterability of (1-x)(K0.5Na0.5)NbO3- LiNbO3 is improved and the sintering temperature is lower than that of pure KNN ceramics. The (1-x)(K0.5Na0.5)NbO3- xLiNbO3(x=0.06) ceramics exhibits an excellent piezoelectric properties with the piezoelectric constant d33, the electromechanical coupling coefficients kp and kt of 205pC/N, 40.3% and 49.8%, respectively.
%K lead-free piezoelectric ceramics
%K piezoelectric properties
%K (K0.5Na0.5)NbO3-LiNbO3
%K perovskite structure
%U http://www.jim.org.cn/fileup/PDF/20070227.pdf