Effect of cuo on the sintering temperature and piezoelectric properties of (na0.5k0.5)nbo3 lead-free piezoelectric ceramics

Hwi Yeol Park; Joo Young Choi; Min Kyu Choi; Kyung Hoon Cho; Sahn Nahm; Hyeung Gyu Lee; Hyung Won Kang

doi:10.1111/j.1551-2916.2008.02408.x

Effect of cuo on the sintering temperature and piezoelectric properties of (na_0.5k_0.5)nbo₃ lead-free piezoelectric ceramics

Hwi Yeol Park, Joo Young Choi, Min Kyu Choi, Kyung Hoon Cho, Sahn Nahm, Hyeung Gyu Lee, Hyung Won Kang

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

135 Citations (Scopus)

Abstract

When a small amount of CuO was added to (Na_0.5K _0.5)NbO₃ (NKN) ceramics sintered at 960°C for 2 h, a dense microstructure with increased grains was developed, probably due to liquidphase sintering. The Curie temperature slightly increased when CuO exceeded 1.5 mol%. The Cu²⁺ ion was considered to have replaced the Nb⁵⁺ ion and acted as a hardener, which increased the E_c and Q_m values of the NKN ceramics. High piezoelectric properties of k_p=0.37, Q_m=844, and ε₃ ^T/ε=229 were obtained from the specimen containing 1.5 mol% of CuO sintered at 960°C for 2 h.

Original language	English
Pages (from-to)	2374-2377
Number of pages	4
Journal	Journal of the American Ceramic Society
Volume	91
Issue number	7
DOIs	https://doi.org/10.1111/j.1551-2916.2008.02408.x
Publication status	Published - 2008 Jul

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

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10.1111/j.1551-2916.2008.02408.x

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title = "Effect of cuo on the sintering temperature and piezoelectric properties of (na0.5k0.5)nbo3 lead-free piezoelectric ceramics",

abstract = "When a small amount of CuO was added to (Na0.5K 0.5)NbO3 (NKN) ceramics sintered at 960°C for 2 h, a dense microstructure with increased grains was developed, probably due to liquidphase sintering. The Curie temperature slightly increased when CuO exceeded 1.5 mol%. The Cu2+ ion was considered to have replaced the Nb5+ ion and acted as a hardener, which increased the Ec and Qm values of the NKN ceramics. High piezoelectric properties of kp=0.37, Qm=844, and ε3 T/ε=229 were obtained from the specimen containing 1.5 mol% of CuO sintered at 960°C for 2 h.",

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AU - Park, Hwi Yeol

AU - Choi, Joo Young

AU - Choi, Min Kyu

AU - Cho, Kyung Hoon

AU - Nahm, Sahn

AU - Lee, Hyeung Gyu

AU - Kang, Hyung Won

PY - 2008/7

Y1 - 2008/7

N2 - When a small amount of CuO was added to (Na0.5K 0.5)NbO3 (NKN) ceramics sintered at 960°C for 2 h, a dense microstructure with increased grains was developed, probably due to liquidphase sintering. The Curie temperature slightly increased when CuO exceeded 1.5 mol%. The Cu2+ ion was considered to have replaced the Nb5+ ion and acted as a hardener, which increased the Ec and Qm values of the NKN ceramics. High piezoelectric properties of kp=0.37, Qm=844, and ε3 T/ε=229 were obtained from the specimen containing 1.5 mol% of CuO sintered at 960°C for 2 h.

AB - When a small amount of CuO was added to (Na0.5K 0.5)NbO3 (NKN) ceramics sintered at 960°C for 2 h, a dense microstructure with increased grains was developed, probably due to liquidphase sintering. The Curie temperature slightly increased when CuO exceeded 1.5 mol%. The Cu2+ ion was considered to have replaced the Nb5+ ion and acted as a hardener, which increased the Ec and Qm values of the NKN ceramics. High piezoelectric properties of kp=0.37, Qm=844, and ε3 T/ε=229 were obtained from the specimen containing 1.5 mol% of CuO sintered at 960°C for 2 h.

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Effect of cuo on the sintering temperature and piezoelectric properties of (na_0.5k_0.5)nbo₃ lead-free piezoelectric ceramics

Abstract

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