Preparation of Nanograde La-Sr-Ni Complex Oxides Powders by Solid-state Reaction under Microwave
Precursor of La-Sr-Ni complex oxides nanometer powder was synthesized by Solid-state reaction under Microwave in which La(NO3)3 ·6H2O 、 Sr(CH3COO)2·1/2H2O、Ni(CH3COO)2·4H2O were used. Experimental result indicates that diameter of the product is greatly affected by the decomposing temperature. The optimum conditions for preparation of the nanograde powder are microwave power = 600W, decomposing temperature = 600℃ and decomposing time = 5h. XRD and TEM studies show that the main product phase is La0.9Sr0.1NiO3, the crystal form is Rhombohedral, the space group is R-3c, and the average particle size is 10～25nm. Besides, the thermal decomposition mechanical function of precursor was obtained from analysis of DSC-TG curves. The function form of first stage is-In(1-α)7/12 ,the function form of second stage is-In(1-α)4/9.
Solid-state reaction under microwave nanograde La-Sr-Ni complex oxides powder decomposition mechanism
李大光 赵丰华 章弘毅 李铁虎 郭清泉 张鹤丰
西北工业大学材料科学与工程系 西安 710072 广东工业大学轻工化工学院 广州 510006
国际会议
成都
英文
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）