A Catalytic Process for Mullite Whiskers

Mixtures of alumina and silica react with SiF4 above 600°C to form fluorotopaz. Pyrolysis of fluorotopaz gives a stoichiometric yield of interlocked whiskers of mullite and SiF4, which is recovered for reuse. The diameter of whiskers (aspect ratio ∼15) can be controlled from a maximum of ∼100 μm to...

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Veröffentlicht in:	Journal of the American Ceramic Society 1994-04, Vol.77 (4), p.1083-1086
Hauptverfasser:	Moyer, John R., Hughes, Neal N.
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemistry Exact sciences and technology Inorganic chemistry and origins of life Kinetics and mechanism of reactions
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	Mixtures of alumina and silica react with SiF4 above 600°C to form fluorotopaz. Pyrolysis of fluorotopaz gives a stoichiometric yield of interlocked whiskers of mullite and SiF4, which is recovered for reuse. The diameter of whiskers (aspect ratio ∼15) can be controlled from a maximum of ∼100 μm to less than 1 μm.
ISSN:	0002-7820 1551-2916
DOI:	10.1111/j.1151-2916.1994.tb07274.x