期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 514, 期 -, 页码 91-96出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2011.10.094
关键词
Nanostructured materials; Chemical synthesis; Thermodynamic properties; Scanning electron microscopy
资金
- BRNS
- DRDO
- DST
The effect of fuel characteristics on the processing of nano-sized cobalt ferrite fine powders by the combustion technique is reported. By using different combinations of glycine fuel and metal nitrates, the adiabatic flame temperature (T-ad) of the process as well as product characteristics could be controlled easily. Thermodynamic modelling of the combustion reaction shows that as the fuel-to-oxidant ratio increases, the amount of gases produced and adiabatic flame temperatures also increases. The powders obtained by combustion were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), thermo gravimetric analysis and differential thermal analysis (TG-DTA), transmission electron microscope (TEM) and vibrating sample magnetometer (VSM) measurements. The particle size of phase pure cobalt ferrite nanoparticles was found to be <40 nm in this investigation. The effects of glycine addition with stoichiometric (phi = 1), fuel lean (phi < 1) and fuel rich (phi > 1) precursor batches were investigated separately. (C) 2011 Elsevier B. V. All rights reserved.
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