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Infra-red spectroscopic investigation in the mullite field of composition: Al2(Al2 + 2xSi2 − 2x)O10 − x with 0·55 > x > 0·25

✍ Scribed by C.H. Rüscher; G. Schrader; M. Götte

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
772 KB
Volume
16
Category
Article
ISSN
0955-2219

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✦ Synopsis

The infra-red absorption of 2 : 1 and 3 : 2 mullites, and a series of heat-treated mullite starting materials of nominal composition 3Al,O,*2SiO, prepared by the sol-gel process, are investigated in the spectral range 400-1400 cm-' using the KBr powder method. It is shown that the intensity variation of the absorption band in the spectral range 1100-1200 cm ' provides a usejid empirical scale for the determination of mullite compositions.

This absorption feature exhibits the superposition of three peaks, which are related to vibrations of the mullite spectj?c tetrahedral units [SO,], [AlO,] and [APOd/ with frequency maxima at about 1165, 1130 and 1108 cm-', respectively.

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