CuO-added KNbO3-BaZrO3 lead-free piezoelectric ceramics with low loss and large electric field-induced strain

Jongseong Park; Dae Hyeon Kim; Tae Gon Lee; Sung Hoon Cho; Su Jin Park; Jungho Ryu; Sahn Nahm

doi:10.1111/jace.14826

CuO-added KNbO₃-BaZrO₃ lead-free piezoelectric ceramics with low loss and large electric field-induced strain

Jongseong Park, Dae Hyeon Kim, Tae Gon Lee, Sung Hoon Cho, Su Jin Park, Jungho Ryu, Sahn Nahm

Department of Materials Science and Engineering

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

4 Citations (Scopus)

Abstract

CuO-added (1-x)KNbO₃-x mol%BaZrO₃ ceramics with 0.0≤x≤7.0 were sintered at 960°C. Large double polarization vs electric field (P-E) and sprout-shaped strain vs electric field (S-E) hysteresis curves were obtained from the specimens with x≤2.0. They exhibited large polarizing electric fields (E_P) owing to the presence of a large number of defect dipoles (P_Ds) that formed between Cu²⁺ ions and oxygen vacancies. Small double P-E hysteresis curves were observed for the specimens with x≥3.0 with reduced E_P because of the decreased number of P_Ds and the presence of a polymorphic phase structure containing both orthorhombic and pseudocubic structures. In particular, the specimen with x=5.0 exhibited a large strain of 0.16% at 8.0 kV/mm with a small E_P of 1.2 kV/mm and good fatigue property: this specimen maintained a strain of 0.13% at 6.0 kV/mm after 10⁶ cycles of 3.0 kV/mm.

Original language	English
Pages (from-to)	2948-2957
Number of pages	10
Journal	Journal of the American Ceramic Society
Volume	100
Issue number	7
DOIs	https://doi.org/10.1111/jace.14826
Publication status	Published - 2017 Jul 1

Bibliographical note

Publisher Copyright:
© 2017 The American Ceramic Society

Keywords

energy conversion
lead-free ceramics
piezoelectric materials/properties

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Access to Document

10.1111/jace.14826

Cite this

@article{507d15bb13b34ee1a3bece826c26c2ba,

title = "CuO-added KNbO3-BaZrO3 lead-free piezoelectric ceramics with low loss and large electric field-induced strain",

abstract = "CuO-added (1-x)KNbO3-x mol%BaZrO3 ceramics with 0.0≤x≤7.0 were sintered at 960°C. Large double polarization vs electric field (P-E) and sprout-shaped strain vs electric field (S-E) hysteresis curves were obtained from the specimens with x≤2.0. They exhibited large polarizing electric fields (EP) owing to the presence of a large number of defect dipoles (PDs) that formed between Cu2+ ions and oxygen vacancies. Small double P-E hysteresis curves were observed for the specimens with x≥3.0 with reduced EP because of the decreased number of PDs and the presence of a polymorphic phase structure containing both orthorhombic and pseudocubic structures. In particular, the specimen with x=5.0 exhibited a large strain of 0.16% at 8.0 kV/mm with a small EP of 1.2 kV/mm and good fatigue property: this specimen maintained a strain of 0.13% at 6.0 kV/mm after 106 cycles of 3.0 kV/mm.",

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

author = "Jongseong Park and Kim, {Dae Hyeon} and Lee, {Tae Gon} and Cho, {Sung Hoon} and Park, {Su Jin} and Jungho Ryu and Sahn Nahm",

note = "Publisher Copyright: {\textcopyright} 2017 The American Ceramic Society",

year = "2017",

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doi = "10.1111/jace.14826",

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T1 - CuO-added KNbO3-BaZrO3 lead-free piezoelectric ceramics with low loss and large electric field-induced strain

AU - Park, Jongseong

AU - Kim, Dae Hyeon

AU - Lee, Tae Gon

AU - Cho, Sung Hoon

AU - Park, Su Jin

AU - Ryu, Jungho

AU - Nahm, Sahn

PY - 2017/7/1

Y1 - 2017/7/1

N2 - CuO-added (1-x)KNbO3-x mol%BaZrO3 ceramics with 0.0≤x≤7.0 were sintered at 960°C. Large double polarization vs electric field (P-E) and sprout-shaped strain vs electric field (S-E) hysteresis curves were obtained from the specimens with x≤2.0. They exhibited large polarizing electric fields (EP) owing to the presence of a large number of defect dipoles (PDs) that formed between Cu2+ ions and oxygen vacancies. Small double P-E hysteresis curves were observed for the specimens with x≥3.0 with reduced EP because of the decreased number of PDs and the presence of a polymorphic phase structure containing both orthorhombic and pseudocubic structures. In particular, the specimen with x=5.0 exhibited a large strain of 0.16% at 8.0 kV/mm with a small EP of 1.2 kV/mm and good fatigue property: this specimen maintained a strain of 0.13% at 6.0 kV/mm after 106 cycles of 3.0 kV/mm.

AB - CuO-added (1-x)KNbO3-x mol%BaZrO3 ceramics with 0.0≤x≤7.0 were sintered at 960°C. Large double polarization vs electric field (P-E) and sprout-shaped strain vs electric field (S-E) hysteresis curves were obtained from the specimens with x≤2.0. They exhibited large polarizing electric fields (EP) owing to the presence of a large number of defect dipoles (PDs) that formed between Cu2+ ions and oxygen vacancies. Small double P-E hysteresis curves were observed for the specimens with x≥3.0 with reduced EP because of the decreased number of PDs and the presence of a polymorphic phase structure containing both orthorhombic and pseudocubic structures. In particular, the specimen with x=5.0 exhibited a large strain of 0.16% at 8.0 kV/mm with a small EP of 1.2 kV/mm and good fatigue property: this specimen maintained a strain of 0.13% at 6.0 kV/mm after 106 cycles of 3.0 kV/mm.

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