Fabrication and microstructure of electrically conductive AlN with high thermal conductivity

Takafumi Kusunose, Tohru Sekino, Koichi Niihara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The electrically conductive AlN with high thermal conductivity were successfully fabricated by sintering AlN with a composite additive of 1wt.% Y2O3 and 4wt.% CeO2 in carbon-reduced atmosphere at over 1600 °C. The sudden increase in electrical conductivity is thought to be caused by transition of grain boundary phase from rare-earth oxide to rare-earth oxycarbide. Their electrical conductivities and thermal conductivities increased with increasing sintering temperature. Additionally, sintering temperature influenced the resultant microstructures.

Original languageEnglish
Title of host publicationAdvanced Engineering Ceramics and Composites
PublisherTrans Tech Publications Ltd
Pages57-60
Number of pages4
ISBN (Print)9783037851814
DOIs
Publication statusPublished - 2011 Jan 1
Externally publishedYes

Publication series

NameKey Engineering Materials
Volume484
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Keywords

  • Aluminum nitride
  • Electrical conductivity
  • Grain boundary
  • Grain size
  • Thermal conductivity

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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