Influence of Ta5+ Doping on the Piezoelectric Properties of KNN Ceramics

Peng Xiong; G.Q. Tan; Hui Jun Ren

doi:10.4028/www.scientific.net/KEM.512-515.1399

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 512-515Influence of Ta5+ Doping on the Piezoelectric...

Influence of Ta⁵⁺ Doping on the Piezoelectric Properties of KNN Ceramics

Abstract:

In this study, the KNbO₃, NaNbO₃ and NaTaO₃ powders were synthesized by hydrothermal method and the KNN ceramics were prepared by conventional sintering technique. The physical phase constitution and morphology were analyzed by X-ray diffraction and SEM. The KNN ceramics sintering temperature and the influence of Ta⁵⁺ doping on ceramic properties were explored. The results indicate that the optimal sintering temperature of KNN ceramics is 950°C, and the main phase is orthorhombic structure. After the substitution of Ta⁵⁺, the optimal sintering temperature is increased to 975°C. As the increase of doping amount, the piezoelectric properties have been significantly enhanced. The specimen doping 0.08 mol% Ta⁵⁺ exhibits the enhanced electrical properties (d₃₃=125pC/N, Q_m=131, and k_p=0.24).

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Key Engineering Materials (Volumes 512-515)

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1399-1402

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https://doi.org/10.4028/www.scientific.net/KEM.512-515.1399

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June 2012

Authors:

Peng Xiong, G.Q. Tan, Hui Jun Ren

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Doping, KNN, Piezoelectric Properties

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