Piezoelectric properties of (Na1-xKx)NbO3-based lead-free piezoelectric ceramics and their application in knocking sensor
- Authors
- Kim, Dae-Hyeon; Lee, Tae-Gon; Cho, Sung-Hoon; Lee, Ku-Tak; Kang, Chong-Yun; Lee, Won-Kyoung; Lee, Chung-Kook; Nahm, Sahn
- Issue Date
- 12월-2017
- Publisher
- WILEY
- Keywords
- lead-free ceramics; piezoelectric materials/properties; sensors
- Citation
- JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.100, no.12, pp.5367 - 5373
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF THE AMERICAN CERAMIC SOCIETY
- Volume
- 100
- Number
- 12
- Start Page
- 5367
- End Page
- 5373
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/81479
- DOI
- 10.1111/jace.15107
- ISSN
- 0002-7820
- Abstract
- Piezoelectric knocking sensors with a dense microstructure were fabricated at 960 degrees C for 2hours using various CuO-added (Na0.5K0.5)NbO3 (NKN)-based piezoelectric ceramics. The practical sensitivity (S-P) of the knocking sensor, which is the ability to detect the knocking of a car engine, was influenced by the g(33) x k(p) value of the piezoelectric ceramics, indicating that the g(33) x k(p) can be considered a figure of merit of the piezoelectric ceramics used in the knocking sensor. The knocking sensor synthesized using the CuO-added 0.95(Na0.5K0.5)(Nb0.95Sb0.05)O-3-0.05CaTiO(3) (CNKNS-CT) ceramic, which showed a g(33) of 25.7Vm/N and k(p) of 0.46, exhibited a high S-P of 119mV/g at the resonance frequency. The S-P of the commercial knocking sensor, which was synthesized using the Pb(Zr,Ti)O-3 (PZT)-based ceramic, was 112mV/g at the resonance frequency. Hence, the knocking sensor fabricated using the CNKNS-CT piezoelectric ceramic can be used to replace the commercial PZT-based knocking sensor.
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Collections - Graduate School > KU-KIST Graduate School of Converging Science and Technology > 1. Journal Articles
- College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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