EFFECT OF PREPARATION METHOD ON PROPERTIES OF BNT-BKT-BT PIEZOELECTRIC CERAMICS
0.852BiosNao5Ti03-0.120Bio.5K0.5Ti03-0.028BaTi03(BNTBKT-BT) ceramics prepared by solid state reaction and hydrothermal method is investigated in this paper. The study is aimed at finding out the effects of different preparation methods on dielectric and piezoelecrtic properties of BNT-BKT-BT ceramics. BNTBKT-BT ceramics were fabricated by conventional solid state reaction and hydrothermal method. XRD results show that a pure perovskite without a secondary phase is structured, while the diffraction intensity of the powder by solid state reaction is higher than that of the powder by hydrothermal method. At the same time, SEM shows a significant difference of surface topography between the ceramics comes up with different preparation methods, which also takes place in dielectric and piezoelectric properties of the ceramics. The values of piezoelectric constant d33, dielectric constant er, mechanical quality factor Qm, and electromechanical planar coupling coefficients kj, of BNT-BKT-BT ceramics by solid state reaction are higher than that of ceramics by hydrothermal method while the dielectric loss factor tanS and thick electromechanical coupling factor k, is lower. The experimental results reveal that the preparation method is of great help in taking effect on dielectric constant er, and piezoelectric constant d33.
BNT-BKT-BT Hydrothermal Piezoelectric Lead-free
JunLIU Ling-juanFEI Cai-fengCHEN Xiao-liHAN YingLUO
School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013
国际会议
深圳
英文
279-281
2011-12-09（万方平台首次上网日期，不代表论文的发表时间）