Portal de Periódicos da CAPES

A Catalytic Process for Mullite Whiskers

1994; Wiley; Volume: 77; Issue: 4 Linguagem: Inglês

10.1111/j.1151-2916.1994.tb07274.x

1551-2916

John R. Moyer, Neal Hughes,

Microwave Dielectric Ceramics Synthesis

Mixtures of alumina and silica react with SiF 4 above 600°C to form fluorotopaz. Pyrolysis of fluorotopaz gives a stoichiometric yield of interlocked whiskers of mullite and SiF 4 , 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.