Low-temperature sintering and piezoelectric properties of CuO -added KNbO 3 ceramics

Dae Hyeon Kim; Mi Ri Joung; In Tae Seo; Joon Hur; Jong Hyun Kim; Bo Yun Kim; Hwack Joo Lee; Sahn Nahm

doi:10.1111/jace.13225

Low-temperature sintering and piezoelectric properties of CuO -added KNbO ₃ ceramics

Dae Hyeon Kim, Mi Ri Joung, In Tae Seo, Joon Hur, Jong Hyun Kim, Bo Yun Kim, Hwack Joo Lee, Sahn Nahm

Department of Materials Science and Engineering

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

15 Citations (Scopus)

Abstract

Dielectric and piezoelectric properties of CuO-added KNbO₃ (KN) ceramics were investigated. The CuO reacted with the Nb₂O₅, formed a CuO-Nb₂O₅-related liquid phase during the sintering, and assisted the densification of the KN ceramics at low temperatures. Moreover, some of the Cu²⁺ ions replaced the Nb⁵⁺ ions in the matrix and behaved as a hardener. The dielectric and piezoelectric properties of the KN ceramics were considerably influenced by the relative density. The 1.0 mol% CuO-added KN ceramic sintered at 960°C for 1.0 h, which showed a maximum relative density, exhibited a high phase angle of 86.9°, P_r of 14.8 μC/cm², and E_c of 1.8 kV/mm. This specimen also exhibited good dielectric and piezoelectric properties: ε^T ₃₃/ε_o of 364, d₃₃ of 122 pC/N, k_p of 0.29, and Q_m of 611.

Original language	English
Pages (from-to)	3897-3903
Number of pages	7
Journal	Journal of the American Ceramic Society
Volume	97
Issue number	12
DOIs	https://doi.org/10.1111/jace.13225
Publication status	Published - 2014 Jan 1

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

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title = "Low-temperature sintering and piezoelectric properties of CuO -added KNbO 3 ceramics",

abstract = "Dielectric and piezoelectric properties of CuO-added KNbO3 (KN) ceramics were investigated. The CuO reacted with the Nb2O5, formed a CuO-Nb2O5-related liquid phase during the sintering, and assisted the densification of the KN ceramics at low temperatures. Moreover, some of the Cu2+ ions replaced the Nb5+ ions in the matrix and behaved as a hardener. The dielectric and piezoelectric properties of the KN ceramics were considerably influenced by the relative density. The 1.0 mol% CuO-added KN ceramic sintered at 960°C for 1.0 h, which showed a maximum relative density, exhibited a high phase angle of 86.9°, Pr of 14.8 μC/cm2, and Ec of 1.8 kV/mm. This specimen also exhibited good dielectric and piezoelectric properties: εT 33/εo of 364, d33 of 122 pC/N, kp of 0.29, and Qm of 611.",

author = "Kim, {Dae Hyeon} and Joung, {Mi Ri} and Seo, {In Tae} and Joon Hur and Kim, {Jong Hyun} and Kim, {Bo Yun} and Lee, {Hwack Joo} and Sahn Nahm",

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doi = "10.1111/jace.13225",

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T1 - Low-temperature sintering and piezoelectric properties of CuO -added KNbO 3 ceramics

AU - Kim, Dae Hyeon

AU - Joung, Mi Ri

AU - Seo, In Tae

AU - Hur, Joon

AU - Kim, Jong Hyun

AU - Kim, Bo Yun

AU - Lee, Hwack Joo

AU - Nahm, Sahn

PY - 2014/1/1

Y1 - 2014/1/1

N2 - Dielectric and piezoelectric properties of CuO-added KNbO3 (KN) ceramics were investigated. The CuO reacted with the Nb2O5, formed a CuO-Nb2O5-related liquid phase during the sintering, and assisted the densification of the KN ceramics at low temperatures. Moreover, some of the Cu2+ ions replaced the Nb5+ ions in the matrix and behaved as a hardener. The dielectric and piezoelectric properties of the KN ceramics were considerably influenced by the relative density. The 1.0 mol% CuO-added KN ceramic sintered at 960°C for 1.0 h, which showed a maximum relative density, exhibited a high phase angle of 86.9°, Pr of 14.8 μC/cm2, and Ec of 1.8 kV/mm. This specimen also exhibited good dielectric and piezoelectric properties: εT 33/εo of 364, d33 of 122 pC/N, kp of 0.29, and Qm of 611.

AB - Dielectric and piezoelectric properties of CuO-added KNbO3 (KN) ceramics were investigated. The CuO reacted with the Nb2O5, formed a CuO-Nb2O5-related liquid phase during the sintering, and assisted the densification of the KN ceramics at low temperatures. Moreover, some of the Cu2+ ions replaced the Nb5+ ions in the matrix and behaved as a hardener. The dielectric and piezoelectric properties of the KN ceramics were considerably influenced by the relative density. The 1.0 mol% CuO-added KN ceramic sintered at 960°C for 1.0 h, which showed a maximum relative density, exhibited a high phase angle of 86.9°, Pr of 14.8 μC/cm2, and Ec of 1.8 kV/mm. This specimen also exhibited good dielectric and piezoelectric properties: εT 33/εo of 364, d33 of 122 pC/N, kp of 0.29, and Qm of 611.

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Low-temperature sintering and piezoelectric properties of CuO -added KNbO ₃ ceramics

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