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

Woo Seok Kang, Tae Gon Lee, Joo Hee Kang, Ju Hyeon Lee, Gangho Choi, Sun Woo Kim, Sahn Nahm, Wook Jo

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

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.

Original languageEnglish
Pages (from-to)2482-2487
Number of pages6
JournalJournal of the European Ceramic Society
Volume41
Issue number4
DOIs
Publication statusPublished - 2021 Apr

Keywords

  • Electromechanical strains
  • Piezoceramics
  • Templated grain growth

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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