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CaTiO3 linear dielectric ceramics with greatly enhanced dielectric strength and energy storage density

CaTiO is a typical linear dielectric material with high dielectric constant, low dielectric loss, and high resistivity, which is expected as a promising candidate for the high energy storage density applications. In the previous work, an energy density of 1.5 J/cm was obtained in CaTiO ceramics, whe... Full description

Journal Title: Journal of the American Ceramic Society May 2018, Vol.101(5), pp.1999-2008
Main Author: Zhou, Hai Yang
Other Authors: Liu, Xiao Qiang , Zhu, Xiao Li , Chen, Xiang Ming
Format: Electronic Article Electronic Article
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ID: ISSN: 0002-7820 ; E-ISSN: 1551-2916 ; DOI: 10.1111/jace.15371
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recordid: wj10.1111/jace.15371
title: CaTiO3 linear dielectric ceramics with greatly enhanced dielectric strength and energy storage density
format: Article
creator:
  • Zhou, Hai Yang
  • Liu, Xiao Qiang
  • Zhu, Xiao Li
  • Chen, Xiang Ming
subjects:
  • Dielectric Materials/Properties
  • Perovskites
  • Spark Plasma Sintering
ispartof: Journal of the American Ceramic Society, May 2018, Vol.101(5), pp.1999-2008
description: CaTiO is a typical linear dielectric material with high dielectric constant, low dielectric loss, and high resistivity, which is expected as a promising candidate for the high energy storage density applications. In the previous work, an energy density of 1.5 J/cm was obtained in CaTiO ceramics, where the dielectric strength was only 435 kV/cm. In fact, the intrinsic dielectric strength of CaTiO is predicted as high as 4.2 MV/cm. Therefore, it should be a challenge issue to enhance the dielectric strength and energy storage density of CaTiO ceramics by optimizing the microstructures. In the present work, dense CaTiO ceramics with fine and uniform microstructures are prepared by spark plasma sintering, and the greatly enhanced dielectric strength (910 kV/cm) and energy storage density (6.9 J/cm) are obtained. This can be ascribed to the improved resistivity and thermal conductivity, associated with the fine and uniform microstructures. The different post‐breakdown features of CaTiO ceramics prepared by different process well interpret why the enhanced dielectric strength is achieved in the sample. The energy storage density can be further improved to 11.8 J/cm by introducing the amorphous alumina thin films as the charge blocking layer, where the dielectric strength is 1188 kV/cm.
language:
source:
identifier: ISSN: 0002-7820 ; E-ISSN: 1551-2916 ; DOI: 10.1111/jace.15371
fulltext: fulltext
issn:
  • 0002-7820
  • 00027820
  • 1551-2916
  • 15512916
url: Link


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subjectDielectric Materials/Properties ; Perovskites ; Spark Plasma Sintering
descriptionCaTiO is a typical linear dielectric material with high dielectric constant, low dielectric loss, and high resistivity, which is expected as a promising candidate for the high energy storage density applications. In the previous work, an energy density of 1.5 J/cm was obtained in CaTiO ceramics, where the dielectric strength was only 435 kV/cm. In fact, the intrinsic dielectric strength of CaTiO is predicted as high as 4.2 MV/cm. Therefore, it should be a challenge issue to enhance the dielectric strength and energy storage density of CaTiO ceramics by optimizing the microstructures. In the present work, dense CaTiO ceramics with fine and uniform microstructures are prepared by spark plasma sintering, and the greatly enhanced dielectric strength (910 kV/cm) and energy storage density (6.9 J/cm) are obtained. This can be ascribed to the improved resistivity and thermal conductivity, associated with the fine and uniform microstructures. The different post‐breakdown features of CaTiO ceramics prepared by different process well interpret why the enhanced dielectric strength is achieved in the sample. The energy storage density can be further improved to 11.8 J/cm by introducing the amorphous alumina thin films as the charge blocking layer, where the dielectric strength is 1188 kV/cm.
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titleCaTiO3 linear dielectric ceramics with greatly enhanced dielectric strength and energy storage density
descriptionCaTiO is a typical linear dielectric material with high dielectric constant, low dielectric loss, and high resistivity, which is expected as a promising candidate for the high energy storage density applications. In the previous work, an energy density of 1.5 J/cm was obtained in CaTiO ceramics, where the dielectric strength was only 435 kV/cm. In fact, the intrinsic dielectric strength of CaTiO is predicted as high as 4.2 MV/cm. Therefore, it should be a challenge issue to enhance the dielectric strength and energy storage density of CaTiO ceramics by optimizing the microstructures. In the present work, dense CaTiO ceramics with fine and uniform microstructures are prepared by spark plasma sintering, and the greatly enhanced dielectric strength (910 kV/cm) and energy storage density (6.9 J/cm) are obtained. This can be ascribed to the improved resistivity and thermal conductivity, associated with the fine and uniform microstructures. The different post‐breakdown features of CaTiO ceramics prepared by different process well interpret why the enhanced dielectric strength is achieved in the sample. The energy storage density can be further improved to 11.8 J/cm by introducing the amorphous alumina thin films as the charge blocking layer, where the dielectric strength is 1188 kV/cm.
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abstractCaTiO is a typical linear dielectric material with high dielectric constant, low dielectric loss, and high resistivity, which is expected as a promising candidate for the high energy storage density applications. In the previous work, an energy density of 1.5 J/cm was obtained in CaTiO ceramics, where the dielectric strength was only 435 kV/cm. In fact, the intrinsic dielectric strength of CaTiO is predicted as high as 4.2 MV/cm. Therefore, it should be a challenge issue to enhance the dielectric strength and energy storage density of CaTiO ceramics by optimizing the microstructures. In the present work, dense CaTiO ceramics with fine and uniform microstructures are prepared by spark plasma sintering, and the greatly enhanced dielectric strength (910 kV/cm) and energy storage density (6.9 J/cm) are obtained. This can be ascribed to the improved resistivity and thermal conductivity, associated with the fine and uniform microstructures. The different post‐breakdown features of CaTiO ceramics prepared by different process well interpret why the enhanced dielectric strength is achieved in the sample. The energy storage density can be further improved to 11.8 J/cm by introducing the amorphous alumina thin films as the charge blocking layer, where the dielectric strength is 1188 kV/cm.
doi10.1111/jace.15371
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date2018-05