c/a Ratio‐Dependent Energy‐Storage Density in (0.9−x)Bi0.5Na0.5TiO3–xBaTiO3–0.1K0.5Na0.5NbO3 Ceramics

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Abstract:

The (0.9−x)Bi0.5Na0.5TiO3–xBaTiO3–0.1K0.5Na0.5NbO3 [BNBKN(x), x = 0.060, 0.063, 0.066, and 0.069] ceramics were fabricated by the conventional sintering technique. The PE hysteresis loops measured under 5 kV/mm at room temperature show that the BNBKN(0.063) ceramics obtain the maximum (Ps−Pr) value of 20.6 μC/cm2 and the largest energy‐storage density W of 0.424 J/cm3. In addition, calculation from the X‐ray diffraction results shows that the BNBKN(0.063) ceramics are featured with the largest c/a ratio of 0.70887. The W is observed to increase with the increase of the c/a ratio in the BNBKN(x) ceramics. The c/a ratio can be regarded as a significant factor for W in the BNBKN(x) ceramics.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1551-2916.2011.04912.x

Publication date: December 1, 2011

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