LIU Yang WANG Hong
(School of Material Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333001)
Abstract: Ultrafine α-Al2O3 powder was prepared by homogeneous preparation method using urea and aluminium sulfate as materials. The effects of reaction temperature, initial reaction concentration of aluminium sulfate and dosage of urea on precursor productivity were investigated. The dehydration process of the precursor was analyzed by DTA-TG, and the heattreated final powder was characterized by XRD and SEM. The result indicated that perfect ultrafine α-Al2O3 powder with high purity, narrow size range, spherical shape properties was obtained by calcination of the precursor at 1200℃.
Keywords: ultrafine α-Al2O3 powder, urea, homogeneous precipitation method