Preparation of submicron silicon nitride powders via self-propagating high-temperature synthesis

L. N. Chukhlomina, Yu F. Ivanov, Yu M. Maksimov, Z. S. Akhunova, E. N. Krivosheeva

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Nitridation of commercial ferrosilicon via self-propagating high-temperature synthesis is described. The nitrogen pressure is shown to influence the conversion and the combustion rate of the alloy. Dilution of the starting alloy with the final product or an ammonium salt influences the nitrogen content of the nitrided material. The high nitrogen content of the reaction products made it possible to isolate a sufficient amount of silicon nitride with a particle size of 0.43 μm by acid enrichment in an HCl solution. The microstructure of silicon nitride prepared under different conditions is studied by electron microscopy. Electron diffraction results indicate that the final product contains, in addition to the well-known α and β phases (hexagonal structure), tetragonal and orthorhombic Si 3N 4 polymorphs.

Original languageEnglish
Pages (from-to)1294-1299
Number of pages6
JournalInorganic Materials
Volume41
Issue number12
DOIs
Publication statusPublished - Dec 2005

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Silicon nitride
Powders
Nitrogen
Nitridation
Phase structure
Polymorphism
Reaction products
Ammonium Compounds
Electron diffraction
Temperature
Electron microscopy
Dilution
Salts
Particle size
Microstructure
Acids
silicon nitride

ASJC Scopus subject areas

  • Materials Science(all)

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Preparation of submicron silicon nitride powders via self-propagating high-temperature synthesis. / Chukhlomina, L. N.; Ivanov, Yu F.; Maksimov, Yu M.; Akhunova, Z. S.; Krivosheeva, E. N.

In: Inorganic Materials, Vol. 41, No. 12, 12.2005, p. 1294-1299.

Research output: Contribution to journalArticle

Chukhlomina, L. N. ; Ivanov, Yu F. ; Maksimov, Yu M. ; Akhunova, Z. S. ; Krivosheeva, E. N. / Preparation of submicron silicon nitride powders via self-propagating high-temperature synthesis. In: Inorganic Materials. 2005 ; Vol. 41, No. 12. pp. 1294-1299.
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