Acta Phys. -Chim. Sin. ›› 1993, Vol. 9 ›› Issue (03): 382-385.doi: 10.3866/PKU.WHXB19930317

• ARTICLE • Previous Articles     Next Articles

Studies on Formation Conditions of Perovskite-type Oxides LaNiO3 and LaMnO3

Hu Rui-Sheng; Shen Yue-Nian; Wang Hong-Yu; Sun Yong-An; Bai Yu-Shan   

  1. Inner Mongolia University, Hohhot 010021; Inner Mongolia Teachers' College, Tongliao 028043
  • Received:1991-12-14 Revised:1992-09-15 Published:1993-06-15
  • Contact: Shen Yue-Nian

Abstract: Single phase perovskite-type oxides,polycrystal powder LaNiO_3 and LaMnO_3, have been prepared by decomposing mixed nitrates and citric acid compexing methods respectively. X-ray powder diffraction analysis showed that the formation of LaNiO_3 was caused by a solid reaction in which mixed oxides were converted into LaNiO_3; while LaMnO_3 was growing out of amorphous substance directly. By DTA, TG and IR etc. measurements, it was found that ion NO_3- took part in the formation of LaNiO_3 and LaMnO_3. At the same time, the function of the complexing agent was discussed. Citric acid favors fomation of single phase pevoskite-type oxides, especially in the case of LaMnO_3.

Key words: LaNiO3, LaMnO3, Peovskite-type crystal, X-ray powder diffraction, Thermoanalysis