Effects of K content on the dielectric, piezoelectric, and ferroelectric properties of 0.95(K{sub x}Na{sub 1-x})NbO{sub 3}-0.05LiSbO{sub 3} lead-free ceramics
- Department of Materials Science, Sichuan University, Chengdu 610064 (China)
- Department of Materials Science, Sichuan University, Chengdu 610064 (China) and College of Materials Science and Metallurgy Engineering, Guizhou University, Guizhou 550003 (China)
The effects of K content on the dielectric, piezoelectric, and ferroelectric properties of 0.95(K{sub x}Na{sub 1-x})NbO{sub 3}-0.05LiSbO{sub 3} (0.95K{sub x}NN-0.05LS) (x=0.25-0.75) lead-free piezoelectric ceramics prepared by conventional solid-state sintering were studied. The experimental results show that the dielectric, piezoelectric, and ferroelectric properties strongly depend on K content in the 0.95K{sub x}NN-0.05LS ceramics. The 0.95K{sub x}NN-0.05LS (x=0.40) ceramics exhibit enhanced electrical properties (d{sub 33}{approx_equal}280 pC/N; k{sub p}{approx_equal}49.4%; T{sub c}{approx}364 deg. C; T{sub o-t}=25 deg. C; {epsilon}{sub r}{approx_equal}1463; tan {delta}{approx_equal}2.3%; P{sub r}{approx}30.8 {mu}C/cm{sup 2}; E{sub c}{approx}14.0 kV/cm). The enhanced electrical properties of 0.95K{sub x}NN-0.05LS (x=0.40) ceramics are attributed to the polymorphic phase transition near room temperature. These results show that 0.95K{sub x}NN-0.05LS (x=0.40) ceramic is a promising lead-free piezoelectric material.
- OSTI ID:
- 21064522
- Journal Information:
- Journal of Applied Physics, Vol. 103, Issue 2; Other Information: DOI: 10.1063/1.2830997; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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