Production of aluminum nitride from aluminum metal using molten fluoride

Osamu Takeda, Konosuke Takagi, Takeshi Handa, Kiwamu Katagiri, Hongmin Zhu, Yuzuru Sato

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The production of aluminum nitride (AlN) from aluminum metal was investigated in this study. The nitridation of Al (in rod, powder, and thin-plate forms) was facilitated by dissolving the Al2O3 thin films formed on the Al samples with a molten fluoride mixture (KF-45 mol% AlF3, KF, or LiF-50 mol% KF). AlN was formed when NH3 gas was supplied to the Al sample (in both solid and liquid forms) wetted by molten fluoride mixture. The lowest temperature at which AlN was successfully produced was 773 K. No AlN was formed when N2 or H2-25% N2 gas was supplied to the Al sample, even when a molten fluoride mixture was used. The reaction rate for the nitridation of Al powder increased with the temperature and reached 99% after 3 h at 1173 K. AlN thin films of 2-5 μm thickness were formed on Al thin plates (0.075-1.0 mm thick) at 873 K.

Original languageEnglish
Pages (from-to)635-644
Number of pages10
JournalJournal of Materials Research
Volume30
Issue number5
DOIs
Publication statusPublished - 2015 Feb 18

Keywords

  • Al
  • chemical reaction
  • nitride

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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