Morphotropic Phase Boundary Study of the BNT-BKT Lead-Free Piezoelectric Ceramics

Wei Zhao; He Ping Zhou; Yong Ke Yan; Dan Liu

doi:10.4028/www.scientific.net/KEM.368-372.1908

Paper Titles

Temperature Dependence of Raman Spectrum of Lead-Free Piezoelectric (Na_0.5K_0.5)NbO₃-LiNbO₃ Ceramics
p.1893

(1-x)(K_0.44Na_0.52Li_0.04)(Nb_0.84Ta_0.10Sb_0.06)O₃-xSrTiO₃ Lead Free Piezoelectric Ceramics
p.1896

Hydrothermal Synthesis of Na(Nb_1-xTa_x)O₃ Powder for Fabrication of Lead-Free Piezoelectric Ceramics
p.1899

Fabrication and Characterization of Li₂O Excess (Na_0.49K_0.49Li_0.02)(Nb_0.8Ta_0.2)O₃ Piezoelectric Ceramics
p.1902

Preparation and Characterization of High Textured KSr₂Nb₅O₁₅ Lead-Free Piezoelectric Ceramics
p.1905

Morphotropic Phase Boundary Study of the BNT-BKT Lead-Free Piezoelectric Ceramics
p.1908

Piezoelectric and Dielectric Properties of (Bi_0.5Na_0.5)_0.94(Ba_1-xSr_x)_0.06TiO₃ Lead-Free Piezoelectric Ceramics
p.1911

Piezoelectric and Dielectric Properties of Bi₂O₃-Doped (Bi_0.5Na_0.5)_0.94Ba_0.06TiO₃ Lead-Free Piezoelectric Ceramics
p.1915

Grain Growth and Electric Properties of Lead-Free BaTiO₃ Ceramics
p.1919

HomeKey Engineering MaterialsKey Engineering Materials Vols. 368-372Morphotropic Phase Boundary Study of the BNT-BKT...

Morphotropic Phase Boundary Study of the BNT-BKT Lead-Free Piezoelectric Ceramics

Abstract:

A lead-free piezoelectric ceramic binary system based on bismuth sodium titanate (Bi0.5Na0.5)TiO3 (BNT)-bismuth potassium titanate (Bi0.5K0.5)TiO3 (BKT) was synthesized by conventional mixed-oxide technique. The XRD analysis showed that the rhombohedral-tetragonal morphotropic phase boundary (MPB) of the Bi0.5 (Na1-xKx)0.5 TiO3 system was in the composition range of x = 0.16 ~ 0.20. In addition, the piezoelectric properties of this system were also investigated. It was indicated that the piezoelectric properties are better with the compositions near the rhombohedral phase within the MPB than the compositions near the tetragonal phase.