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Emanation thermal analysis (ETA) was used for the characterization of surface and porosity annealing of acicular porous hematite samples in the temperature range from 20 to 600 °C under in situ conditions of heating in air flow. Two hematite samples with different surface areas (85 and 44 m 2 g −1 , respectively) were prepared by thermal decomposition of goethite using constant rate...
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