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

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18 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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