Effect of Li2O on the defect polarization in CuO-added (K0.9Na0.1)NbO3 piezoelectric ceramics

Dae Hyeon Kim, Jongseong Park, Tae Gon Lee, Sung Hoon Cho, Su Jin Park, Ku Tak Lee, Jong Hyun Kim, Sahn Nahm

Research output: Contribution to journalArticle

Abstract

CuO-added (LixK0.9-xNa0.1)NbO3 [C(LxK0.9-xN0.1)N] ceramics with 0.0≤x≤0.05 were well-sintered at 960°C for 6 hours. The lattice parameters of the specimens decreased with the addition of Li2O. Defect polarization (PD) formed between Cu2+ions and oxygen vacancies. Double polarization vs electric field (P-E) hysteresis and sprout-shaped strain vs electric field (S-E) curves were observed in these specimens with a large strain of 0.16% at 7.0 kV/mm, possibly owing to the presence of PD. When the P-E curve was measured at temperatures higher than 75°C, the C(K0.9N0.1)N ceramic exhibited a normal P-E hysteresis curve, whereas the C(L0.04K0.86N0.1)N ceramic maintained the double P-E hysteresis curve up to 125°C, indicating that Li2O increased the thermal stability of PD. The latter specimen also showed the sprout shaped S-E curve with a strain of 0.15% at 7.0 kV/mm after 104 cycles of a high electric field of 7.0 kV/mm.

Original languageEnglish
JournalJournal of the American Ceramic Society
DOIs
Publication statusAccepted/In press - 2017

Fingerprint

Piezoelectric ceramics
hysteresis
ceramics
defect
Hysteresis
electric field
polarization
Electric fields
Polarization
Defects
Oxygen vacancies
Lattice constants
Thermodynamic stability
Ions
oxygen
ion
effect
Temperature

Keywords

  • Lead-free ceramics
  • Low temperature
  • Piezoelectric materials/properties

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Effect of Li2O on the defect polarization in CuO-added (K0.9Na0.1)NbO3 piezoelectric ceramics. / Kim, Dae Hyeon; Park, Jongseong; Lee, Tae Gon; Cho, Sung Hoon; Park, Su Jin; Lee, Ku Tak; Kim, Jong Hyun; Nahm, Sahn.

In: Journal of the American Ceramic Society, 2017.

Research output: Contribution to journalArticle

Kim, Dae Hyeon ; Park, Jongseong ; Lee, Tae Gon ; Cho, Sung Hoon ; Park, Su Jin ; Lee, Ku Tak ; Kim, Jong Hyun ; Nahm, Sahn. / Effect of Li2O on the defect polarization in CuO-added (K0.9Na0.1)NbO3 piezoelectric ceramics. In: Journal of the American Ceramic Society. 2017.
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abstract = "CuO-added (LixK0.9-xNa0.1)NbO3 [C(LxK0.9-xN0.1)N] ceramics with 0.0≤x≤0.05 were well-sintered at 960°C for 6 hours. The lattice parameters of the specimens decreased with the addition of Li2O. Defect polarization (PD) formed between Cu2+ions and oxygen vacancies. Double polarization vs electric field (P-E) hysteresis and sprout-shaped strain vs electric field (S-E) curves were observed in these specimens with a large strain of 0.16{\%} at 7.0 kV/mm, possibly owing to the presence of PD. When the P-E curve was measured at temperatures higher than 75°C, the C(K0.9N0.1)N ceramic exhibited a normal P-E hysteresis curve, whereas the C(L0.04K0.86N0.1)N ceramic maintained the double P-E hysteresis curve up to 125°C, indicating that Li2O increased the thermal stability of PD. The latter specimen also showed the sprout shaped S-E curve with a strain of 0.15{\%} at 7.0 kV/mm after 104 cycles of a high electric field of 7.0 kV/mm.",
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AU - Kim, Dae Hyeon

AU - Park, Jongseong

AU - Lee, Tae Gon

AU - Cho, Sung Hoon

AU - Park, Su Jin

AU - Lee, Ku Tak

AU - Kim, Jong Hyun

AU - Nahm, Sahn

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N2 - CuO-added (LixK0.9-xNa0.1)NbO3 [C(LxK0.9-xN0.1)N] ceramics with 0.0≤x≤0.05 were well-sintered at 960°C for 6 hours. The lattice parameters of the specimens decreased with the addition of Li2O. Defect polarization (PD) formed between Cu2+ions and oxygen vacancies. Double polarization vs electric field (P-E) hysteresis and sprout-shaped strain vs electric field (S-E) curves were observed in these specimens with a large strain of 0.16% at 7.0 kV/mm, possibly owing to the presence of PD. When the P-E curve was measured at temperatures higher than 75°C, the C(K0.9N0.1)N ceramic exhibited a normal P-E hysteresis curve, whereas the C(L0.04K0.86N0.1)N ceramic maintained the double P-E hysteresis curve up to 125°C, indicating that Li2O increased the thermal stability of PD. The latter specimen also showed the sprout shaped S-E curve with a strain of 0.15% at 7.0 kV/mm after 104 cycles of a high electric field of 7.0 kV/mm.

AB - CuO-added (LixK0.9-xNa0.1)NbO3 [C(LxK0.9-xN0.1)N] ceramics with 0.0≤x≤0.05 were well-sintered at 960°C for 6 hours. The lattice parameters of the specimens decreased with the addition of Li2O. Defect polarization (PD) formed between Cu2+ions and oxygen vacancies. Double polarization vs electric field (P-E) hysteresis and sprout-shaped strain vs electric field (S-E) curves were observed in these specimens with a large strain of 0.16% at 7.0 kV/mm, possibly owing to the presence of PD. When the P-E curve was measured at temperatures higher than 75°C, the C(K0.9N0.1)N ceramic exhibited a normal P-E hysteresis curve, whereas the C(L0.04K0.86N0.1)N ceramic maintained the double P-E hysteresis curve up to 125°C, indicating that Li2O increased the thermal stability of PD. The latter specimen also showed the sprout shaped S-E curve with a strain of 0.15% at 7.0 kV/mm after 104 cycles of a high electric field of 7.0 kV/mm.

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