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Jo, Wook
Sustainable Functional Ceramics Lab
Research Interests
  • Lead-free piezoceramics, ultra - low temperature sintering, ferroelectrics, relaxor ferroelectrics, 2D materials, magnetoelectric materials, multiferroics

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Bi-templated grain growth maximizing the effects of texture on piezoelectricity

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Title
Bi-templated grain growth maximizing the effects of texture on piezoelectricity
Author
Kang, Woo-SeokLee, Tae-GonKang, Joo-HeeLee, Ju-HyeonChoi, GanghoKim, Sun-WooNahm, SahnJo, Wook
Issue Date
2021-04
Publisher
Elsevier BV
Citation
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, v.41, no.4, pp.2482 - 2487
Abstract
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.
URI
https://scholarworks.unist.ac.kr/handle/201301/54012
URL
https://www.sciencedirect.com/science/article/pii/S0955221920309973?via%3Dihub
DOI
10.1016/j.jeurceramsoc.2020.12.028
ISSN
0955-2219
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