Piezoelectric properties of (Na1−xKx)NbO3-based lead-free piezoelectric ceramics and their application in knocking sensor

Dae Hyeon Kim; Tae Gon Lee; Sung Hoon Cho; Ku Tak Lee; Chong Yun Kang; Won Kyoung Lee; Chung Kook Lee; Sahn Nahm

doi:10.1111/jace.15107

Piezoelectric properties of (Na_1−xK_x)NbO₃-based lead-free piezoelectric ceramics and their application in knocking sensor

Dae Hyeon Kim, Tae Gon Lee, Sung Hoon Cho, Ku Tak Lee, Chong Yun Kang, Won Kyoung Lee, Chung Kook Lee, Sahn Nahm

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Piezoelectric knocking sensors with a dense microstructure were fabricated at 960°C for 2 hours using various CuO-added (Na_0.5K_0.5)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 g₃₃ × k_p value of the piezoelectric ceramics, indicating that the g₃₃ × 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(Na_0.5K_0.5)(Nb_0.95Sb_0.05)O₃–0.05CaTiO₃ (CNKNS–CT) ceramic, which showed a g₃₃ of 25.7 Vm/N and k_p of 0.46, exhibited a high S_P of 119 mV/g at the resonance frequency. The S_P 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.

Original language	English
Pages (from-to)	5367-5373
Number of pages	7
Journal	Journal of the American Ceramic Society
Volume	100
Issue number	12
DOIs	https://doi.org/10.1111/jace.15107
Publication status	Published - 2017 Dec

Keywords

lead-free ceramics
piezoelectric materials/properties
sensors

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Access to Document

10.1111/jace.15107

Cite this

@article{5f31cbcc2aa843fcada5064eae8e2343,

title = "Piezoelectric properties of (Na1−xKx)NbO3-based lead-free piezoelectric ceramics and their application in knocking sensor",

abstract = "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.",

keywords = "lead-free ceramics, piezoelectric materials/properties, sensors",

author = "Kim, {Dae Hyeon} and Lee, {Tae Gon} and Cho, {Sung Hoon} and Lee, {Ku Tak} and Kang, {Chong Yun} and Lee, {Won Kyoung} and Lee, {Chung Kook} and Sahn Nahm",

note = "Funding Information: This work was supported by the Technological Innovation R&D Program (S2329694, Development of Environment Friendly Knocking Sensor using Lead-Free Piezoelectric Ceramics) funded by the Small and Medium Business Administration (SMBA, Korea). The authors thank the KU-KIST graduate school program of Korea University. Publisher Copyright: {\textcopyright} 2017 The American Ceramic Society",

year = "2017",

month = dec,

doi = "10.1111/jace.15107",

language = "English",

volume = "100",

pages = "5367--5373",

journal = "Journal of the American Ceramic Society",

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T1 - Piezoelectric properties of (Na1−xKx)NbO3-based lead-free piezoelectric ceramics and their application in knocking sensor

AU - Kim, Dae Hyeon

AU - Lee, Tae Gon

AU - Cho, Sung Hoon

AU - Lee, Ku Tak

AU - Kang, Chong Yun

AU - Lee, Won Kyoung

AU - Lee, Chung Kook

AU - Nahm, Sahn

N1 - Funding Information: This work was supported by the Technological Innovation R&D Program (S2329694, Development of Environment Friendly Knocking Sensor using Lead-Free Piezoelectric Ceramics) funded by the Small and Medium Business Administration (SMBA, Korea). The authors thank the KU-KIST graduate school program of Korea University. Publisher Copyright: © 2017 The American Ceramic Society

PY - 2017/12

Y1 - 2017/12

N2 - 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.

AB - 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.

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