Citation:
	            
		            Hu  Rui-Sheng, Shen  Yue-Nian, Wang  Hong-Yu, Sun  Yong-An, Bai  Yu-Shan. Studies on Formation Conditions of Perovskite-type Oxides LaNiO3 and LaMnO3[J]. Acta Physico-Chimica Sinica,
							;1993, 9(03): 382-385.
						
							doi:
								10.3866/PKU.WHXB19930317
						
					
				
					
				
	        
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	                	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.
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