THE PREPARATION OF ULTRAFINE HIGH-PURITY Al 2O 3 POWDER BY SOL-GEL METHOD.
Chen Zhong et al.(Institute of Metallurgical Physico-chemisty and Materials,Central South University of Technology,Changsha 410083)
Relats the preparation of Ultra-fine high purity Al 2O 3 by sol-gel method,through invesgating the effects of the initial pH value of the solution ,volume of eitric acid ,concentration of Al 3+ and reaction temperature on the average diameter of the synthetic particle,the process conditions for manufacturing the Ultra-fine Al 2O 3 particle is obtained as following:pH=0.40,CoAl 3+ =0.1mol/L,CoAl 3+ :Cocit=1:3,T=70℃.The shape of Ultra-fine Al 2O 3 particle by this method is spherical,The average particle size is 14nm,the purity reaches 99.98%
【CateGory Index】： TQ133.1