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Journal of Advanced Ceramics 2022, 11(4): 523-531 https://doi.org/10.1007/s40145-021-0552-4
Research Article | Open Access | Issue | Published: 28 January 2022

Enhanced electrical property of graphite/Al2O3 composite fabricated by reductive sintering of gel-casted body using cross-linked epoxy polymer

Show Author's Information Yoshiaki FUNAHASHIa,  Yunzi XINb,  Kunihiko KATOb,  Huu Hien NGUYENb,  Takashi SHIRAIa,b( )
Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
Advanced Ceramics Research Center, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
Keywords:
cross-linking, ceramic composite, gel-casting, reductive sintering, electrical property, graphitization
Cite this article:
FUNAHASHI Y, XIN Y, KATO K, et al. Enhanced electrical property of graphite/Al2O3 composite fabricated by reductive sintering of gel-casted body using cross-linked epoxy polymer. Journal of Advanced Ceramics, 2022, 11(4): 523-531. https://doi.org/10.1007/s40145-021-0552-4
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Abstract Full text About this article

In the present study, graphite/alumina composites are fabricated via reductive sintering of gel-casted green bodies with structurally controlled cross-linked epoxy polymers for the first time. The cross-linking degrees of polymers are tuned by the amount ratio of epoxy monomer/polyvinyl alcohol cross-linker utilized in gel-casting process. Superior electrical properties with respect to 5-fold enhanced electrical conductivity and 2-fold higher carrier mobility are successfully achieved in graphite/alumina composite fabricated from cross-linked epoxy polymer, whose phenomenon is attributed to the excellent conductive path in ceramic matrix established by highly uniform network with improved graphitization degree.


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About this article

Enhanced electrical property of graphite/Al2O3 composite fabricated by reductive sintering of gel-casted body using cross-linked epoxy polymer

Show Author's information Yoshiaki FUNAHASHIa, Yunzi XINb, Kunihiko KATOb, Huu Hien NGUYENb, Takashi SHIRAIa,b( )
Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
Advanced Ceramics Research Center, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan

Abstract

In the present study, graphite/alumina composites are fabricated via reductive sintering of gel-casted green bodies with structurally controlled cross-linked epoxy polymers for the first time. The cross-linking degrees of polymers are tuned by the amount ratio of epoxy monomer/polyvinyl alcohol cross-linker utilized in gel-casting process. Superior electrical properties with respect to 5-fold enhanced electrical conductivity and 2-fold higher carrier mobility are successfully achieved in graphite/alumina composite fabricated from cross-linked epoxy polymer, whose phenomenon is attributed to the excellent conductive path in ceramic matrix established by highly uniform network with improved graphitization degree.

Keywords: cross-linking, ceramic composite, gel-casting, reductive sintering, electrical property, graphitization

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Publication history

Received: 30 May 2021
Revised: 08 October 2021
Accepted: 09 November 2021
Published: 28 January 2022
Issue date: April 2022

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© The Author(s) 2021.

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