Acta Phys. -Chim. Sin. ›› 1994, Vol. 10 ›› Issue (06): 532-535.doi: 10.3866/PKU.WHXB19940610

• ARTICLE • Previous Articles     Next Articles

Alcohol as Inhibitor in Phase-transformation

Zhang Yu-Ting, Dai Zhong-Shan, Yu Ming, Zhang Guo-Chun   

  1. Tianjin College of Textile Technology, Tianjin 300160
  • Received:1993-02-18 Revised:1993-06-14 Published:1994-06-15
  • Contact: Zhang Yu-Ting

Abstract:

Alcohol, presented in the hydrolysis of ferric chloride at elevated temperature, inhibits the phase transformation from β-FeOOH to α-Fe_2O_3, reduces the supersaturation of the precipitated species α-F_2O_3, decreases the number of nucleation and therefore favours the formation of much larger uniform α-F_2O_3 particles. With increasing amount of alcohol, the sizes of particles increase, while the shapes of them change gradually from sphere to cube.

Key words: Phase-transformation, Inhibitor, Supersaturation, Nucleation