Bi-templated grain growth maximizing the effects of texture on piezoelectricity
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- Bi-templated grain growth maximizing the effects of texture on piezoelectricity
- Kang, Woo-Seok; Lee, Tae-Gon; Kang, Joo-Hee; Lee, Ju-Hyeon; Choi, Gangho; Kim, Sun-Woo; Nahm, Sahn; Jo, Wook
- Issue Date
- Elsevier BV
- JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, v.41, no.4, pp.2482 - 2487
- Templated grain growth is beneficial for piezoelectric materials, the properties of which become the best in their single crystalline form. Nevertheless, a textured ceramic prepared by a templated grain growth technique often fails in exhibiting as good properties as expected in single crystals even with a high degree of orientation factor. Here, we propose a new strategy for maximizing texturing effect by suppressing the growth of untextured matrix grains. The textured ceramics made by our method, so-called bi-templated grain growth, are featured by ultrahigh piezoelectric properties (d33 = ∼1,031 pC/N, d⋅g = ∼59,000, kp = ∼0.76). A special emphasis is on the achieved electric-field-induced strain of 0.13 % at 1 kV/mm, which is as high as that of single crystals. This work demonstrates that not only the degree of texture but also the coarsening of untextured matrix grains should be well-controlled to best exploit the templated grain growth technique.
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