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Research Article | Open Access

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

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
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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.

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Keywords

ceramic compositegel-castingreductive sinteringcross-linkingelectrical propertygraphitization

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Journal of Advanced Ceramics
Volume 11 Issue 4,
April 2022
Pages 523-531
DOI: 10.1007/s40145-021-0552-4

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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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Received: 30 May 2021
Revised: 08 October 2021
Accepted: 09 November 2021
Published: 28 January 2022
© The Author(s) 2021.

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