Effect of Excess Li2CO3 Addition on the Physical and Electrical Properties of Lead-Free Bi0.5(Na0.82K0.18)0.5TiO3 Ceramics

Chun Huy Wang

doi:10.4028/www.scientific.net/AMR.779-780.3

Paper Titles

Effect of Excess Li₂CO₃ Addition on the Physical and Electrical Properties of Lead-Free Bi_0.5(Na_0.82K_0.18)_0.5TiO₃ Ceramics
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 779-780Effect of Excess Li2CO3 Addition on the Physical...

Effect of Excess Li₂CO₃ Addition on the Physical and Electrical Properties of Lead-Free Bi_0.5(Na_0.82K_0.18)_0.5TiO₃ Ceramics

Abstract:

In the present study, various quantities of Li2CO3 were added into Bi0.5(Na0.82K0.18)0.5TiO3 (abbreviated as 0.82BNT-0.18BKT) ceramics. For 0.82BNT-0.18BKT ceramics, the electromechanical coupling coefficients of the planar mode kp reaches 0.22 at the sintering of 1125 oC for 3 h. High-density samples were obtained through the addition of Li2CO3 into 0.82BNT-0.18BKT ceramics. It was found that 0.82BNT-0.18BKT with the addition of 0~0.9 wt.% Li2CO3 exhibit relatively good piezoelectric properties. For 0.82BNT-0.18BKT ceramics with the addition of 0.5 wt.% Li2CO3, the electromechanical coupling coefficients of the planar mode kp reach 0.37 at the sintering of 1125oC for 3 h. To promote the kp value, by adding low quantities of Li2CO3 is a effective method for 0.82BNT-0.18BKT solid solution ceramic.