Acta Phys. -Chim. Sin. ›› 1999, Vol. 15 ›› Issue (06): 541-544.doi: 10.3866/PKU.WHXB19990611

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Effects of Adding Various Complexing Agents on the Formation of Single Phase LaFeO3

Hu Rui-Sheng, Duan Yi-Wen, Shen Yue-Nian, Jia Mei-Lin   

  1. Department of Chemistry,Inner Mongolla University,010021 Huhhot|Department of Chemistry,Inner Mongolia Normal University 010022,Huhhot
  • Received:1997-11-04 Revised:1998-03-27 Published:1999-06-15
  • Contact: Hu Rui-Sheng

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Abstract:

In this paper, polycrystalline powders of LaFeO3 have been prepared by the decomposation of mixed nitrates with and without various complexing agents respectively. The Phase changes at different temperatures have been investigated by XRD, TG, DTA and IR. The effects of adding complexing agent, citric acid, HAC and EDTA, on the formation of single phase LaFeO3 have been discussed. The formation of single phase perovskite-type LaFeO3 are favoured by adding various complexing agents. The favourable order for the formations of LaFeO3 is that citric acid＞HAC≈EDTA.

Key words: Perovskitd-type oxides, Rare earths, Complexing agent