Piezoelectric and Dielectric Properties of (Bi0.5Na0.5)TiO3- (Bi0.5K0.5)TiO3-BaTiO3 Lead-Free Piezoelectric Ceramics


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A lead-free piezoelectric ceramic ternary system based on (Bi0.5Na0.5)TiO3 (BNT)-(Bi0.5 K0.5)TiO3(BKT)-BaTiO3(BT) near the morphotropic phase boundary (MPB) between the tetragonal and rhombohedral phases has been investigated. The samples were prepared by a conventional sintering technique. Piezoelectric properties, dielectric properties and microstructures of BNT-BKT-BT lead-free piezoelectric ceramic were studied. The X-ray diffraction (XRD) patterns show that the ceramics possess a single-phase perovskite structure. The measurements of piezoelectric properties reveal that this system has a relatively high piezoelectric performance: the piezoelectric constant d33 reached to 178pC/N and planar electromechanical coupling factor kp enhanced to 0.325. The BNT-BKT-BT ternary system ceramics could be well sintered at 11500C with a high-density ratio of more than 95% of the theoretical density.



Key Engineering Materials (Volumes 336-338)

Edited by:

Wei Pan and Jianghong Gong




Z. W. Chen and Z. Y. Lu, "Piezoelectric and Dielectric Properties of (Bi0.5Na0.5)TiO3- (Bi0.5K0.5)TiO3-BaTiO3 Lead-Free Piezoelectric Ceramics", Key Engineering Materials, Vols. 336-338, pp. 54-57, 2007

Online since:

April 2007




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