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

• 作者: Yoshiaki FUNAHASHI Yunzi XIN Kunihiko KATO Huu Hien NGUYEN Takashi SHIRAI
• 来源期刊: 先进陶瓷（英文版）
• 年，卷（期）: 2022,（4）
• 所属期刊栏目: Research Article
• 页码范围: 523-531
• 页数: 9页
• 语种: 英文

摘要

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.