Effect of Polymer Matrix on the Phase Transitions of CuFe2O4

The effect of a polymer matrix on phase transitions in CuFe2O4spinel oxide has been studied. XRD results show that cubic CuFe2O4is obtained by quenching from 1173 K, while with CuFe2O4-PEEK composite samples, the cubic form is obtained by quenching from considerably lower temperatures (~733 K). The change in resistivity with temperature of the quenched composite samples shows that the cubic samples quenched from <1173 K undergo several phase changes during heating. Measurements of thermoelectric power indicate that the composite samples quenched from <1073 K shown-type conduction, and the sample quenched from 1173 K showsp-type conduction.