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• W2039841750 abstract "Using non-isothermal thermogravimetry (TG), the oxidation kinetics of oxygen-deficient lithium-titanium ferrospinel, Li 0.649 Fe 1.598 Ti 0‥5 Zn 0‥2 Mn 0.051 O 4-δ , manufactured by ceramic engineering is investigated. The oxidation annealing of powder samples is performed in air. According to the X-ray phase analysis, the processes giving rise to variations in oxygen content occur within single-phase spinel structure. The experimental kinetic results are processed using the Netzsch Thermokinetics software. The oxidation rate constants and the effective coefficients of atmospheric oxygen diffusion into the ferrites are determined. The effective activation energy E of oxygen diffusion is found to be 1.95 eV. It is demonstrated that an increase in the oxygen non-stoichiometry parameter δ as a result of recovery annealing of ferrite powders in vacuum at T=1070 K for 2 hours gives rise to a slight decrease in Е down to 1.89 eV. The activation energy of oxygen grain-boundary diffusion is identified by the electroconduction method. The resulting value 1.93 eV is fairly consistent with that obtained by TG." @default.
• W2039841750 created "2016-06-24" @default.
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• W2039841750 date "2012-09-01" @default.
• W2039841750 modified "2023-09-26" @default.
• W2039841750 title "Determination of kinetic characteristics of polycrystalline ferrites oxidation using TG analisis" @default.
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• W2039841750 doi "https://doi.org/10.1109/ifost.2012.6357797" @default.
• W2039841750 hasPublicationYear "2012" @default.
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