Synthesis of Nanosized Pseudoboehmite and γ-Al₂O₃ by Control Precipitation Method

Abstract:

Nanosized pseudoboehmite particles were synthesized by the precipitation of sodium sulfate and ammonia in aqueous solution at 70°C. After calcinations, the pseudoboehmite could successfully transfer to γ-Al2O3 nanoparticles while retaining their previous morphology. The influence of the reaction conditions on formation of pseudoboehmite and γ-Al2O3 had been researched in detail. The X-ray diffraction analysis showed that nanosized crystalline pseudoboehmite was formed at pH 8-8.5 after ageing 2 hours. Utilization of surfactant(PEG1000) would produce finer nanoparticles with well-dispersion. With the ageing time or the surfactant amount increasing, the morphology of the resulting particles transformed from spherical to fibrous

• Periodical: Advanced Materials Research (Volume 684)
• Pages: 46-52
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.684.46
• Online since: April 2013
• Authors: Zhou Qing Jiang, Hong Wen Ma, Jing Yang, Le Wang
• Keywords: Nanosized Pseudoboehmite, Precipitation Method, Sodium Sulfate, Surfactant

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