Articles
  • Influence of additives on the morphology of α-Al2O3 platelets synthesized in a molten salt 
  • Dai Yue-qin, Zhu Li-hui* and Huang Qing-wei
  • Shanghai Key Laboratory of Modern Metallurgy & Materials Processing, P. O. Box 15#, Shanghai University, 149 Yanchang Road, Shanghai 200072, People's Republic of China
Abstract
Trisodium phosphate (Na3PO4 center dot 12H(2)O) and titanyl sulfate (TiOSO4) were chosen to study the influence of additives on the morphology of alpha-Al2O3 platelets synthesized by molten salt synthesis. When Na3PO4 center dot 12H(2)O is added, alpha-Al2O3 platelets become thin and quite irregular. Besides, less overlapped particles can be found. When TiOSO4 is added, regular hexagonal alpha-Al2O3 platelets with a decreased size and increased thickness are obtained. When 0.51 wt% Na3PO4 center dot 12H(2)O and 12 wt% TiOSO4 are added, alpha-Al2O3 platelets with a regular shape and an aspect ratio of 12.5 are developed. The mechanism of Na3PO4 center dot 12H(2)O and TiOSO4 on the morphology of alpha-Al2O3 platelets is also discussed in this paper.

Keywords: Platelets; alpha-Al2O3; Molten salt synthesis; Additives

This Article

  • 2010; 11(2): 254-258

    Published on Apr 30, 2010