Abstract
The synthesis procedure of the Li3Fe2(PO4)3+ Fe2O3 composite is presented. The monoclinic (A type) and hematite phases were detected by X-ray diffraction after the synthesis of the composite. The structural α-β (at a tempera- ture of 460 K) and β-γ (at a temperature of 523 K) phase transitions in the composite were indicated by the anomalies of the electrical conductivity, dielectric permittivity, and changes of activation energies of conductivity. Two phase transitions have been detected in the Li3Fe2(PO4)3+Fe2O3 composite by 57 Fe Mossbauer spectroscopy: the phase transi- tion in Li3Fe2(PO4)3 from the paramagnetic to antiferromag- netic phase at temperature TN=29.5 K and the Morin phase transition in Fe2O3 at temperature TM=235 K.
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