Fabrication of c-axis–oriented AlN bulk ceramics using a rotating magnetic field

Tohru S. Suzuki*, Kiyoshi Kobayashi, Tetsuo Uchikoshi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Controlling the crystallographic orientation in bulk ceramics is expected to improve their properties that depend on the axis of the crystal structure. The development of crystallographic orientation using a magnetic field has been reported in various types of bulk ceramics with anisotropic crystal structures. In this study, c-axis–oriented AlN bulk ceramics were prepared by slip casting in a rotating high magnetic field. The c-axes of 61% of the grains were aligned within 20°. Due to this orientation, the thermal conductivity of AlN was improved. A thermal conductivity difference of approximately 14% at room temperature was observed for the samples with different orientation axes, which is higher than its intrinsic anisotropy.

Original languageEnglish
JournalInternational Journal of Applied Ceramic Technology
DOIs
Publication statusAccepted/In press - 2022
Externally publishedYes

Keywords

  • bending strength
  • c-axis orientation
  • sintering
  • slip casting
  • thermal conductivity

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Marketing
  • Materials Chemistry

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