Fabrication of epoxy/silicon nitride nanowire composites and evaluation of their thermal conductivity

Takafumi Kusunose, Takashi Yagi, Shakhawat H. Firoz, Tohru Sekino

Research output: Contribution to journalArticlepeer-review

97 Citations (Scopus)

Abstract

To improve the thermal conductivity of epoxy resins without losing the insulation, epoxy/silicon nitride (Si3N4) nanowire composites were produced. β-Si3N4 nanowires were synthesized by the carbothermal reduction and nitridation of a homogeneous mixture of silica (SiO2), carbon, and a small amount of cobalt via the vapor-liquid-solid (VLS) mechanism. The ratio of β to α phase in the product Si3N4 increased with heat-treatment temperature; however, the undesirable SiC also increased. By increasing the nitrogen gas pressure in the heat treatment, the ratio of β- to α-Si3N4 increased without producing SiC. The epoxy composite containing Si3N4 nanowires of 60 vol% showed a high thermal conductivity of 9.2 W m-1 K-1 along the preferred orientation of the nanowires.

Original languageEnglish
Pages (from-to)3440-3445
Number of pages6
JournalJournal of Materials Chemistry A
Volume1
Issue number10
DOIs
Publication statusPublished - 2013 Mar 14

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Fingerprint

Dive into the research topics of 'Fabrication of epoxy/silicon nitride nanowire composites and evaluation of their thermal conductivity'. Together they form a unique fingerprint.

Cite this