Low-Temperature Synthesis of Aluminum Nitride from Transition Alumina by Microwave Processing

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6 Citations (Scopus)

Abstract

Aluminum nitride (AlN) was synthesized by carbothermal reduction and nitridation method from a mixture of various transition alumina powders and carbon black using 2.45 GHz microwave irradiation in N2 atmosphere. We achieved the synthesis of AlN at 1300–1400°C using 2.45 GHz microwave irradiation for 60 min. Our results suggest that θ-Al2O3 is more easily nitrided than γ-, δ-, and α-Al2O3. On the other hand, nitridation ratio of samples synthesized in a conventional furnace under nitrogen atmosphere were zero or very low. These results show that 2.45 GHz microwave irradiation enhanced the reduction and nitridation reaction of alumina.

Original languageEnglish
Pages (from-to)3540-3545
Number of pages6
JournalJournal of the American Ceramic Society
Volume99
Issue number11
DOIs
Publication statusPublished - 2016 Jan 1

Keywords

  • aluminum nitride
  • microwaves
  • processing

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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