Microstructure and piezoelectric properties of ZnO-added (Na 0.5K0.5)NbO3 ceramics

Seung Ho Park; Cheol Woo Ahn; Sahn Nahm; Jae Sung Song

doi:10.1143/JJAP.43.L1072

Microstructure and piezoelectric properties of ZnO-added (Na _0.5K_0.5)NbO₃ ceramics

Seung Ho Park, Cheol Woo Ahn, Sahn Nahm, Jae Sung Song

Department of Materials Science and Engineering

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

233 Citations (Scopus)

Abstract

The orthorhombic structure of (Na_0.5K_0.5)NbO ₃ (NKN) ceramics was maintained when ZnO was added. NKN ceramics have a porous microstructure and dissolve when they are exposed to water. However, as ZnO was added, a dense microstructure was developed and deliquescence was not observed. The mechanical quality factor (Q_m) and coercive field (E_c) increased with the addition of ZnO, indicating that ZnO acted as a hardener in the NKN ceramics. The dielectric constant (ε₃^T/ε_o), piezoelectric constant (d₃₃) and electromechanical coupling factor (k_p) increased when a small amount of ZnO was added, which might be due to the increase in density. The good dielectric and piezoelectric properties of ε₃^T/ε_o = 500, d₃₃ = 121 and k_p, = 0.4 were obtained for the NKN ceramics with 1.0mol% ZnO.

Original language	English
Pages (from-to)	L1072-L1074
Journal	Japanese Journal of Applied Physics, Part 2: Letters
Volume	43
Issue number	8 B
DOIs	https://doi.org/10.1143/JJAP.43.L1072
Publication status	Published - 2004 Aug 15

Keywords

(NaK)NbO
Deliquescence
Lead-free ceramics
Piezoelectric properties
ZnO

ASJC Scopus subject areas

General Engineering
General Physics and Astronomy

Access to Document

10.1143/JJAP.43.L1072

Cite this

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title = "Microstructure and piezoelectric properties of ZnO-added (Na 0.5K0.5)NbO3 ceramics",

abstract = "The orthorhombic structure of (Na0.5K0.5)NbO 3 (NKN) ceramics was maintained when ZnO was added. NKN ceramics have a porous microstructure and dissolve when they are exposed to water. However, as ZnO was added, a dense microstructure was developed and deliquescence was not observed. The mechanical quality factor (Qm) and coercive field (Ec) increased with the addition of ZnO, indicating that ZnO acted as a hardener in the NKN ceramics. The dielectric constant (ε3T/εo), piezoelectric constant (d33) and electromechanical coupling factor (kp) increased when a small amount of ZnO was added, which might be due to the increase in density. The good dielectric and piezoelectric properties of ε3T/εo = 500, d33 = 121 and kp, = 0.4 were obtained for the NKN ceramics with 1.0mol% ZnO.",

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AU - Park, Seung Ho

AU - Ahn, Cheol Woo

AU - Nahm, Sahn

AU - Song, Jae Sung

PY - 2004/8/15

Y1 - 2004/8/15

N2 - The orthorhombic structure of (Na0.5K0.5)NbO 3 (NKN) ceramics was maintained when ZnO was added. NKN ceramics have a porous microstructure and dissolve when they are exposed to water. However, as ZnO was added, a dense microstructure was developed and deliquescence was not observed. The mechanical quality factor (Qm) and coercive field (Ec) increased with the addition of ZnO, indicating that ZnO acted as a hardener in the NKN ceramics. The dielectric constant (ε3T/εo), piezoelectric constant (d33) and electromechanical coupling factor (kp) increased when a small amount of ZnO was added, which might be due to the increase in density. The good dielectric and piezoelectric properties of ε3T/εo = 500, d33 = 121 and kp, = 0.4 were obtained for the NKN ceramics with 1.0mol% ZnO.

AB - The orthorhombic structure of (Na0.5K0.5)NbO 3 (NKN) ceramics was maintained when ZnO was added. NKN ceramics have a porous microstructure and dissolve when they are exposed to water. However, as ZnO was added, a dense microstructure was developed and deliquescence was not observed. The mechanical quality factor (Qm) and coercive field (Ec) increased with the addition of ZnO, indicating that ZnO acted as a hardener in the NKN ceramics. The dielectric constant (ε3T/εo), piezoelectric constant (d33) and electromechanical coupling factor (kp) increased when a small amount of ZnO was added, which might be due to the increase in density. The good dielectric and piezoelectric properties of ε3T/εo = 500, d33 = 121 and kp, = 0.4 were obtained for the NKN ceramics with 1.0mol% ZnO.

KW - (NaK)NbO

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