| Autor: |
Dae-Hyeon Kim, Tae-Gon Lee, Sung-Hoon Cho, Ku-Tak Lee, Chong-Yun Kang, Won-Kyoung Lee, Chung-Kook Lee, Sahn Nahm |
| Předmět: |
|
| Zdroj: |
Journal of the American Ceramic Society; Dec2017, Vol. 100 Issue 12, p5367-5373, 7p, 2 Black and White Photographs, 1 Chart, 3 Graphs |
| Abstrakt: |
Piezoelectric knocking sensors with a dense microstructure were fabricated at 960°C for 2 hours using various CuO-added (Na0.5K0.5)NbO3 (NKN)-based piezoelectric ceramics. The practical sensitivity (SP) of the knocking sensor, which is the ability to detect the knocking of a car engine, was influenced by the g33 × kp value of the piezoelectric ceramics, indicating that the g33 × kp 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)O3-0.05CaTiO3 (CNKNS-CT) ceramic, which showed a g33 of 25.7 Vm/N and kp of 0.46, exhibited a high SP of 119 mV/g at the resonance frequency. The SP of the commercial knocking sensor, which was synthesized using the Pb(Zr,Ti)O3 (PZT)-based ceramic, was 112 mV/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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
