Piezoelectric and Ferroelectric Properties of KNN-LS-BF1-xCx Ceramics

Hua Wang; Xia Yan Zhao; Ji Wen Xu; Ling Yang

doi:10.4028/www.scientific.net/AMR.1120-1121.94

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1120-1121Piezoelectric and Ferroelectric Properties of...

Piezoelectric and Ferroelectric Properties of KNN-LS-BF_1-_xC_x Ceramics

Abstract:

0.998[(0.95(K0.5Na0.5)NbO₃-0.05LiSbO₃]-0.002BiFe_1-_xCo_xO₃ (KNN-LS-BF_1-_xC_x, x=0-0.8) piezoelectric ceramics were prepared by solid-state reaction method. The influences of Co content on piezoelectric and ferroelectric properties were investigated. The results reveal that the substitution of Co significantly affects the piezoelectric and ferroelectric properties of KNN-LS-BF_1-_xC_x ceramics. All samples with various Co contents show a pure perovskite structure. With increasing x from 0 to 0.8, the depolarization temperature T_d of KNN-LS-BF_1-_xC_x ceramics increase with increasing x, and the piezoelectric constant d₃₃ of KNN-LS-BF_1-_xC_x specimen with x=0.2 is larger than those of other KNN-LS-BF_1-_xC_x specimens in the investigated range when the temperature is lower than T_d. The remnant polarization P_r decrease with x in the investigated range, but the coercive field E_c increase to 1.78kV/mm with x up to 0.6, and then decrease with further increase of Co contents x.

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Advanced Materials Research (Volumes 1120-1121)

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94-97

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https://doi.org/10.4028/www.scientific.net/AMR.1120-1121.94

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July 2015

Authors:

Hua Wang*, Xia Yan Zhao, Ji Wen Xu, Ling Yang

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Ceramic, Co Doping, Ferroelectric Properties, Piezoelectric Properties

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