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SYNTHESIS OF NANOCRYSTALLINE ALUMINA POWDER WITH SOL-GEL METHOD

Yue Li

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Abstract

AlOOH boehmite sol was prepared by sol gel method with Al(NO\-3)\-3 and NH\-3·H\-2O as raw materials.Some PVA were added into the sol,then dry to form dry AlOOH gel .The different kinds of Al\-2O\-3 nanocrstallines were obtained by calcining the dry gel at different calcining temperature.XRD results indicate that the phase transformation sequence of dry AlOOH gel during heating is AlOOH→e-Al\-2O\-3→-Al\-2O\-3→δ-Al\-2O\-3→θ-Al\-2O\-3→α-Al\-2O\-3.The powder size of Al\-2O\-3 nanocrystallines were detected with electronic microscope and BET method.

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What this paper is about

AlOOH boehmite sol was prepared by sol gel method with Al(NO\-3)\-3 and NH\-3·H\-2O as raw materials.Some PVA were added into the sol,then dry to form dry AlOOH gel .The different kinds of Al\-2O\-3 nanocrstallines were obtained by calcining the dry gel at different calcining temperature.XRD results indicate that the phase transformation sequence of dry AlOOH gel during heating is AlOOH→e-Al\-2O\-3→-Al\-2O\-3→δ-Al\-2O\-3→θ-Al\-2O\-3→α-Al\-2O\-3.The powder size of Al\-2O\-3 nanocrystallines were detected with electronic microscope and BET method.

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Available abstract

AlOOH boehmite sol was prepared by sol gel method with Al(NO\-3)\-3 and NH\-3·H\-2O as raw materials.Some PVA were added into the sol,then dry to form dry AlOOH gel .The different kinds of Al\-2O\-3 nanocrstallines were obtained by calcining the dry gel at different calcining temperature.XRD results indicate that the phase transformation sequence of dry AlOOH gel during heating is AlOOH→e-Al\-2O\-3→-Al\-2O\-3→δ-Al\-2O\-3→θ-Al\-2O\-3→α-Al\-2O\-3.The powder size of Al\-2O\-3 nanocrystallines were detected with electronic microscope and BET method.

Key concepts: Boehmite, Calcination, Sol-gel, Nanocrystalline material, Materials science, Phase (matter), Raw material, Chemical engineering

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SYNTHESIS OF NANOCRYSTALLINE ALUMINA POWDER WITH SOL-GEL METHOD — Research Paper | ScholarLens