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Nanocomposite aerogels: The SiO2–Al2O3 system

Published online by Cambridge University Press:  03 March 2011

Sridhar Komarneni ,
Rustum Roy ,
Ulagaraj Selvaraj ,
Prakash B. Malla  and
Else Breval
Sridhar Komarneni
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802-4801
Rustum Roy
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802-4801
Ulagaraj Selvaraj
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802-4801
Prakash B. Malla
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802-4801
Else Breval
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802-4801
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Abstract

Monolithic nanocomposite aerogels of two aluminosilicate compositions have been prepared and characterized by different techniques. The results show that high surface area and mesoporosity can be preserved in the above nanocomposite aerogels by heating at 1000 °C, unlike the single component aerogels. The presence of alumina as a second phase prevented their densification which resulted in surface areas on the order of 500–600 m2/g and mesopores of about 5–6 nm in diameter after heat treatment at 1000 °C. These novel nanocomposite aerogels are expected to find applications at high-temperatures in separations, insulation, catalysis, etc.

Type
Articles
Information
Journal of Materials Research , Volume 8 , Issue 12 , December 1993 , pp. 3163 - 3167
Copyright
Copyright © Materials Research Society 1993

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