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http://dx.doi.org/10.4313/JKEM.2020.33.5.337

Low Temperature Sintering of BNKT Lead-Free Piezoelectric Ceramics Using CuO-Coated Na0.5Bi4.5Ti4O15 Templates  

Jeong, Gwang-Hwi (School of Materials Science and Engineering, University of Ulsan)
Lee, Sang-Seop (School of Materials Science and Engineering, University of Ulsan)
Ahn, Chang Won (Department of Physics, University of Ulsan)
Han, Hyoung Su (School of Materials Science and Engineering, University of Ulsan)
Lee, Jae-Shin (School of Materials Science and Engineering, University of Ulsan)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.33, no.5, 2020 , pp. 337-343 More about this Journal
Abstract
This study investigated the low temperature sintering with various templates of Bi-based lead-free piezoelectric ceramics. The effects of using CuO-coated Na0.5Bi4.5Ti4O15 templates on the sintering behavior as well as the dielectric, ferroelectric, and piezoelectric properties of Bi1/2(Na0.78K0.22)1/2TiO3 (BNKT) ceramics have been examined. In comparison with the specimens sintered with the Na0.5Bi4.5Ti4O15 templates without CuO coating, those sintered with the CuO-coated Na0.5Bi4.5Ti4O15 templates showed larger template sizes as well as a larger electric field induced strain (Smax/Emax) of 422 pm/V after sintering at temperatures as low as 975℃. These results are promising for low-cost multilayer ceramic actuator applications.
Keywords
Piezoelectric; Lead-free ceramics;
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