Preparation and Characterization of Monolithic Al2O3 Aerogels

Heng Chen; Xue Ye Sui; Chang Ling Zhou; Chong Hai Wang; Fu Tian Liu

doi:10.4028/www.scientific.net/MSF.852.591

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HomeMaterials Science ForumMaterials Science Forum Vol. 852Preparation and Characterization of Monolithic...

Preparation and Characterization of Monolithic Al₂O₃ Aerogels

Abstract:

Al₂O₃ aerogels were obtained through sol-gel process and ethanol supercritical drying technology using anhydrous aluminium chloride (AlCl₃) and propylene oxide as precursor and gelation initiator respectively. Monolithic Al₂O₃ aerogels with porous and large specific surface area were achieved in our studies. Morphology and properties of Al₂O₃ aerogels were investigated by techniques of X-ray diffraction, Nitrogen adsorption/desorption analysis, Scanning electron microscopy, and Fourier transform infrared spectroscope. The results showed that the Al₂O₃ aerogels possessed a porous network microstructure made up of needles or rod-shaped particles and a specific surface area of 398 m²/g at 600°C. It was transformed to θ-Al₂O₃ after calcined at 1200°C.

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Periodical:

Materials Science Forum (Volume 852)

Pages:

591-595

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.852.591

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Online since:

April 2016

Authors:

Heng Chen, Xue Ye Sui, Chang Ling Zhou, Chong Hai Wang, Fu Tian Liu

Keywords:

Al₂O₃ Aerogels, High-Temperature Stability, Phase Transformation, Specific Surface Area

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