Abstract
Chromium doped spinels LiCrYMn2−YO4 (0.2≤Y≤0.8) has been synthesized by the sucrose-aided combustion procedure. The thermal behaviour, phase homogeneity and structural characteristics of the samples were studied by thermal analysis, coupled mass spectrometry, and room-and high-temperature X-ray diffraction methods. It was found that the ‘as prepared’ samples contained residual organic impurities undetectable for X-ray diffraction, that burn out completely at 400°C. Samples treated between 400 and 750°C are single phase spinels, whose crystallites size increase from 10 to 50 nm on increasing the temperature. Cr-doping enhances the thermal stability of the spinels, which augments on increasing the Cr content Y. The enhanced thermal stability of the spinels has been accounted for based on the high excess stabilization energy of Cr3+ in octahedral ligand field.
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Rojas, R.M., Petrov, K., Avdeev, G. et al. High-temperature thermal behaviour of Cr-Doped LiMn2O4 spinels synthesized by the sucrose-aided combustion method. J Therm Anal Calorim 90, 67–72 (2007). https://doi.org/10.1007/s10973-007-8477-x
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DOI: https://doi.org/10.1007/s10973-007-8477-x