THERMAL PROPERTIES OF PSS COATED COBALT ZINC FERRITE NANOPARTICLES SYNTHESIZED BY CO-PRECIPITATION METHOD

Abstract

In this work Cobalt Zinc Ferrite nanoparticles Co1-xZnxFe2O4 for x = 0.25, 0.5 and 0.75 were synthesized via coprecipitation method. Annealing of all the samples was carried out at 700 ºC for 5 hours. To investigate the crystal structure XRD analysis was used which confirmed the ferrite structure of synthesized samples. Afterwards surface coating of all the samples was done by biocompatible polymer PSS. Surface functionalization of magnetic nanoparticles with PSS (Polystyrene Sulphonate) was confirmed by FTIR spectrum of samples from 2000 cm-1 to 4000 cm-1 . Thermal properties and temperature variation with oscillating magnetic field was investigated by RF induction method. That showed increasing temperatures with decreasing concentration of Zinc content.Also Increase in temperature was observed directly related to the frequency of applied magnetic field and concentration of Cobalt in the sample. SAR values for the sample were estimated using specific heat of samples and temperature slope and it was observed that SAR is directly related to cobalt content as well as inversely to the Zn content in the samples.