Publication Details

Dong, N., Gao, X., Xia, F., Liu, H., Hao, H. & Zhang, S. (2019). Dielectric and Piezoelectric Properties of Textured Lead-Free Na0.5Bi0.5TiO3-Based Ceramics. Crystals, 9 (4), 9040206-1-9040206-11.


This work provides a comparative study of the dielectric and piezoelectric properties of randomly oriented and textured 0.88Na 0.5 Bi 0.5 TiO 3 -0.08K 0.5 Bi 0.5 TiO 3 -0.04BaTiO 3 (88NBT) ceramics. Textured ceramics were fabricated by template grain growth (TGG) method using NaNbO 3 (NN) for templates. For textured ceramics with 4 wt% NN templates, a Lotgering factor of 96% and piezoelectric coefficient d 33 of 185 pC/N were obtained. Compared to the randomly oriented ceramics, textured ceramics show lower strain hysteresis (H = 7.6%), higher unipolar strain of 0.041% with corresponding large signal piezoelectric coefficient d 33* of 200 pm/V at applied field of 2 kV/mm. This enhancement can be explained by the grain orientation along direction by texturing, where an engineered domain configuration is formed after polarization, leading to decreased hysteresis and increased piezoelectric property.



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