Effect of halogen species of acidic mineralizer on solubility of GaN in supercritical ammonia

Daisuke Tomida, Taketo Kuribayashi, Kousuke Suzuki, Yuji Kagamitani, Toru Ishiguro, Tsuguo Fukuda, Chiaki Yokoyama

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

The solubility of gallium nitride (GaN) in supercritical ammonia with either ammonium bromide (NH4Br) or ammonium iodide (NH4I) as a mineralizer was evaluated by measuring the weight loss of polycrystalline GaN on dissolution. The solubility of GaN with these mineralizers was compared with that of ammonium chloride (NH4Cl). The temperature dependence of the GaN solubility with different mineralizers was in the order NH 4I>NH4Br>NH4Cl. At high temperatures a high level of supersaturation was obtained with NH4I at a low-temperature difference to NH4Cl. These results suggest that use of NH4I as a mineralizer could increase the crystal growth rate of GaN.

Original languageEnglish
Pages (from-to)52-54
Number of pages3
JournalJournal of Crystal Growth
Volume325
Issue number1
DOIs
Publication statusPublished - 2011 Jun 15

Keywords

  • A1. Solubility
  • A1. Solvents
  • A2. Ammonothermal crystal growth
  • B1. Gallium nitride

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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