Lead-free piezoelectric ceramic (K0.5Na0.5)NbO3with MnO2and K5.4Cu1.3Ta10O29doping for piezoelectric transformer application

Dunmin Lin; M. S. Guo; Kwok Ho Lam; Kin Wing Kwok; H. L.W. Chan

doi:10.1088/0964-1726/17/3/035002

Lead-free piezoelectric ceramic (K_0.5Na_0.5)NbO₃with MnO₂and K_5.4Cu_1.3Ta₁₀O₂₉doping for piezoelectric transformer application

Dunmin Lin, M. S. Guo, Kwok Ho Lam, Kin Wing Kwok, H. L.W. Chan

Research output: Journal article publication › Journal article › Academic research › peer-review

43 Citations (Scopus)

Abstract

In this study, K0.5Na0.5NbO3+0.25 mol% MnO2+0.38 mol% K5.4Cu1.3Ta10O29lead-free piezoelectric ceramics were prepared by a conventional ceramic sintering technique and fabricated into a square-plate contour-vibration-mode piezoelectric transformer. The ceramic was well sintered to a dense structure at 1110 °C. Because of the pinning effects provided by the defect dipoles, the ceramic exhibited excellent 'hard' piezoelectric characteristics: d33= 90 pC N-1, kp= 0.40, εr= 300, tanδ = 0.003 and Qm= 1900. The piezoelectric transformer showed a maximum power density of 10 W cm-3with a temperature rise of 20 °C. When operated with a matching load of 8 kΩ, the maximum efficiency of the transformer reached 96%. The transformer has great potential to be used in power supply units and other electronic circuits.

Original language	English
Article number	035002
Journal	Smart Materials and Structures
Volume	17
Issue number	3
DOIs	https://doi.org/10.1088/0964-1726/17/3/035002
Publication status	Published - 1 Jun 2008

ASJC Scopus subject areas

Signal Processing
Civil and Structural Engineering
Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics
Mechanics of Materials
Electrical and Electronic Engineering

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10.1088/0964-1726/17/3/035002

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title = "Lead-free piezoelectric ceramic (K0.5Na0.5)NbO3with MnO2and K5.4Cu1.3Ta10O29doping for piezoelectric transformer application",

abstract = "In this study, K0.5Na0.5NbO3+0.25 mol% MnO2+0.38 mol% K5.4Cu1.3Ta10O29lead-free piezoelectric ceramics were prepared by a conventional ceramic sintering technique and fabricated into a square-plate contour-vibration-mode piezoelectric transformer. The ceramic was well sintered to a dense structure at 1110 °C. Because of the pinning effects provided by the defect dipoles, the ceramic exhibited excellent 'hard' piezoelectric characteristics: d33= 90 pC N-1, kp= 0.40, εr= 300, tanδ = 0.003 and Qm= 1900. The piezoelectric transformer showed a maximum power density of 10 W cm-3with a temperature rise of 20 °C. When operated with a matching load of 8 kΩ, the maximum efficiency of the transformer reached 96%. The transformer has great potential to be used in power supply units and other electronic circuits.",

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AU - Lin, Dunmin

AU - Guo, M. S.

AU - Lam, Kwok Ho

AU - Kwok, Kin Wing

AU - Chan, H. L.W.

PY - 2008/6/1

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N2 - In this study, K0.5Na0.5NbO3+0.25 mol% MnO2+0.38 mol% K5.4Cu1.3Ta10O29lead-free piezoelectric ceramics were prepared by a conventional ceramic sintering technique and fabricated into a square-plate contour-vibration-mode piezoelectric transformer. The ceramic was well sintered to a dense structure at 1110 °C. Because of the pinning effects provided by the defect dipoles, the ceramic exhibited excellent 'hard' piezoelectric characteristics: d33= 90 pC N-1, kp= 0.40, εr= 300, tanδ = 0.003 and Qm= 1900. The piezoelectric transformer showed a maximum power density of 10 W cm-3with a temperature rise of 20 °C. When operated with a matching load of 8 kΩ, the maximum efficiency of the transformer reached 96%. The transformer has great potential to be used in power supply units and other electronic circuits.

AB - In this study, K0.5Na0.5NbO3+0.25 mol% MnO2+0.38 mol% K5.4Cu1.3Ta10O29lead-free piezoelectric ceramics were prepared by a conventional ceramic sintering technique and fabricated into a square-plate contour-vibration-mode piezoelectric transformer. The ceramic was well sintered to a dense structure at 1110 °C. Because of the pinning effects provided by the defect dipoles, the ceramic exhibited excellent 'hard' piezoelectric characteristics: d33= 90 pC N-1, kp= 0.40, εr= 300, tanδ = 0.003 and Qm= 1900. The piezoelectric transformer showed a maximum power density of 10 W cm-3with a temperature rise of 20 °C. When operated with a matching load of 8 kΩ, the maximum efficiency of the transformer reached 96%. The transformer has great potential to be used in power supply units and other electronic circuits.

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Lead-free piezoelectric ceramic (K_0.5Na_0.5)NbO₃with MnO₂and K_5.4Cu_1.3Ta₁₀O₂₉doping for piezoelectric transformer application

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