"Enhanced electrical property of graphite/Al<sub>2</sub>O<sub>3</sub> c" by Yoshiaki FUNAHASHI, Yunzi XIN et al.

Article Title

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

Authors

Yoshiaki FUNAHASHI, Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
Yunzi XIN, Advanced Ceramics Research Center, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
Kunihiko KATO, Advanced Ceramics Research Center, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
Huu Hien NGUYEN, Advanced Ceramics Research Center, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
Takashi SHIRAI, 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

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

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.

Recommended Citation

FUNAHASHI, Yoshiaki; XIN, Yunzi; KATO, Kunihiko; NGUYEN, Huu Hien; and SHIRAI, Takashi (2022) "Enhanced electrical property of graphite/Al₂O₃ composite fabricated by reductive sintering of gel-casted body using cross-linked epoxy polymer," Journal of Advanced Ceramics: Vol. 11: Iss. 4, Article 1.
DOI: https://doi.org/10.1007/s40145-021-0552-4
Available at: https://dc.tsinghuajournals.com/journal-of-advanced-ceramics/vol11/iss4/1

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