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Citation: WU Yu-Cheng, YANG Ye, LI Yong, CUI Ping. Effect of Addition of Alumina Sol on γ→αPhase Transformation of Ultrafined Alumina[J]. Acta Physico-Chimica Sinica, ;2005, 21(01): 79-83. doi: 10.3866/PKU.WHXB20050116 shu

Effect of Addition of Alumina Sol on γ→αPhase Transformation of Ultrafined Alumina

1.
Faculty of Materials Science ＆ Engineering, Hefei University of Technology, Hefei　230009; Nano Science ＆ Technology Center, Institute of Solid State Physics Chinese Academy of Sciences, Hefei　230031

Received Date: 9 May 2004
Available Online: 15 January 2005

The effect of alumina sol on the α phase transformation in γ-alumina powder has been studied. In comparison with α-alumina seeds, the alumina sol can also act as seeds. Moreover, because of the small particle size and perfect dispersibility of the alumina sol, the α phase transformation temperature is decreased and, meanwhile, the microstructure of the produced powders is modified. So ultrafined powders with a particle size less than 100 nm were produced with od dispersibility. The α phase transformation of the alumina precursors with alumina sol doping was studied on the base of the TEM photographs of the produced powders.
- Ultrafined;Alumina;Sol;Seeding;α phase transformation
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