Low temperature synthesis of ALN nanopowders by the microwave assisted combustion method

Jung Min Lee, Byung Ik Kim, Jong Heun Lee, Ki Hyeon Kim, Myoung Pyo Chun

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Aluminum nitride (AlN) powder was calcined at low temperature through the carbothermal reduction nitridation (CRN) assisted by microwave heating. Their phase formation and microstructure were investigated with X-ray diffraction (XRD) and transmission electron microscopy (TEM). The starting materials such as aluminum nitrate nonahydrate (Al(NO3)3 · 9H2O), urea (NH2CONH2) and glucose anhydrous (C6H12O6) were dissolved by stirring with a magnetic bar at 100°C for 25 min and then the precursor solution was dried at oven. The mixing molar ratio of urea to aluminum nitrate = 1.6 and that of glucose to aluminum nitrate = 1.0 were selected, respectively. The dried precursor mixtures were calcined at 1200 ~ 1500°C for 60 min. in N2 atmosphere by a microwave heating furnace and then carburized at 700°C for 2 hrs in air. The homogeneous AlN powders, free of alumina, were obtained by calcining at temperatures above 1300°C. The particle size of AlN powder increases monotonically with increasing the calcination temperature. From TEM micrographs, the AlN powders calcined at 1300°C and 1500°C were found to be around 30 nm and 90 nm, respectively.

Original languageEnglish
Pages (from-to)707-711
Number of pages5
JournalJournal of Ceramic Processing Research
Volume14
Issue number6
Publication statusPublished - 2013

Keywords

  • Aluminum nitride (AlN)
  • Carbothermal
  • Microwave combustion
  • Nano particle
  • Synthesis

ASJC Scopus subject areas

  • Ceramics and Composites

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