Bi-templated grain growth maximizing the effects of texture on piezoelectricity. Issue 4 (April 2021)

• Record Type: Journal Article
• Authors: Kang, Woo-Seok; Lee, Tae-Gon; Kang, Joo-Hee; Lee, Ju-Hyeon; Choi, Gangho; Kim, Sun-Woo; Nahm, Sahn; Jo, Wook
• Is Part Of: Journal of the European Ceramic Society. Volume 41:Issue 4(2021)
• Page Start: 2482
• Page End: 2487
• Publication Date: 2021-04
• Subjects: Templated grain growth -- Piezoceramics -- Electromechanical strains; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2020.12.028
• Languages: English
• ISSNs: 0955-2219

Abstract

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.