Preparation of Alumina Powders through Pyrocatechol, Resorcinol Mediated Sol-Gel Method

Xiang Zhang; Ping Yun Li; Xiao De Guo; Ting Yan

doi:10.4028/www.scientific.net/MSF.850.742

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HomeMaterials Science ForumMaterials Science Forum Vol. 850Preparation of Alumina Powders through...

Preparation of Alumina Powders through Pyrocatechol, Resorcinol Mediated Sol-Gel Method

Abstract:

Ultrafine alumina powders were synthesized through pyrocatechol and resorcinol mediated sol-gel process. Aluminum nitrate was applied as the Al source and PVP was the dispersant. X-ray diffraction (XRD) study displayed that γ-Al₂O₃ powders formed in the range of 800-900 °C, and then γ-Al₂O₃transformed to α-Al₂O₃ at higher temperatures, pure α-Al₂O₃ powders could be obtained at 1000 °C by using resorcinol as organic monomer. The results of transmission electron microscopy (TEM) revealed that Al₂O₃ nanoparticles with γ crystalline phase had grain sizes in the range of 5-40 nm. Scanning electron microscopy (SEM) observation displayed that the morphology of the prepared α-Al₂O₃ powders had aggregated bodies formed by Al₂O₃ grains in the range of 0.2-0.5μm. These results provide a new way of preparation of alumina powders.

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Periodical:

Materials Science Forum (Volume 850)

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742-747

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https://doi.org/10.4028/www.scientific.net/MSF.850.742

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Online since:

March 2016

Authors:

Xiang Zhang, Ping Yun Li, Xiao De Guo*, Ting Yan

Keywords:

Alumina, Cross-Linking Reaction, Pyrocatechol, Resorcinol

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