Journal of Materials Science

, Volume 29, Issue 6, pp 1595–1600

Effect of grain boundary phase on the thermal conductivity of aluminium nitride ceramics

  • Ching -Fong Chen
  • M. E. Perisse
  • A. F. Ramirez
  • N. P. Padture
  • H. M. Chan
Papers

DOI: 10.1007/BF00368932

Cite this article as:
Chen, C.F., Perisse, M.E., Ramirez, A.F. et al. JOURNAL OF MATERIALS SCIENCE (1994) 29: 1595. doi:10.1007/BF00368932

Abstract

AIN with high thermal conductivity was fabricated by pressureless sintering with Y2O3 as the sintering aid. The thermal conductivity was observed to increase with sintering time (up to 8 h) at 1810 °C. The distribution of the sintering aid was identified as one of the major factors influencing the thermal conductivity in AIN. Non-uniform distribution of the grain boundary phase was found to be associated with a significant amount of porosity, resulting in the enhancement of phonon scattering and thereby lowering the thermal conductivity.

Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • Ching -Fong Chen
    • 1
  • M. E. Perisse
    • 1
  • A. F. Ramirez
    • 1
  • N. P. Padture
    • 2
  • H. M. Chan
    • 2
  1. 1.Keramont CorporationTucsonUSA
  2. 2.Lehigh UniversityBethlehemUSA
  3. 3.Technical Ceramics DivisionLECO CorporationAugustaUSA
  4. 4.Saxonburg Ceramics Inc.SaxonburgUSA
  5. 5.MER Corp.TucsonUSA
  6. 6.NISTGaithersburgUSA