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3703808 
Journal Article 
Synthesis and Characterization of Thermochromic La0.75Ca0.25MnO3 Perovskite Manganites Nano-powders by Microwave-assisted Solution Combustion Synthesis 
Kahatta, S; Techitdheera, W; Chaiyo, N; Pecharapa, W; Vittayakorn, N 
2014 
Yes 
Integrated Ferroelectrics
ISSN: 1058-4587 
150 
1 
96-106 
WOS:000331784400009 
The microwave-assisted solution combustion synthesis was developed for application with initially synthesized thermochromic perovskite manganese oxide La0.75Ca0.25MnO3 nano-powders. Dry and very fine powders were obtained after one-step combustion reaction for less than 10min in a modified domestic microwave oven. The thermal behavior, phase formation and purity of the precursor, and as-synthesized and calcined powders, were investigated by TGA/DTA, X-ray diffraction (XRD) and FT-IR techniques. The morphology of the powder obtained was characterized using a scanning electron microscope (SEM). The XRD pattern and FT-IR results showed that as-synthesized La0.75Ca0.25MnO3 powders were crystalline, and the monophasic perovskite phase occurred with an average crystallite size of 30.46 +/- 5.54nm for 6h at a relatively low calcination temperature of 900 degrees C. The small particle size obtained by SEM suggested a high specific surface area and high sinterability. This method was found to be simple, rapid and cheap, and an effective way to prepare nano-size perovskite powders. 
La0.75Ca0.25MnO3; combustion synthesis; perovskite; manganites