COBALT FERRITIC NANOPARTICLES OBTAINED BY CHEMICAL COPRECIPITATION AND HYDROTHERMAL METHODS
Pages 145-149
M. Bradiceanu, P. Vlazan, S. Novaconi, I. Grozescu, P. Barvinschi
Abstract
Cobalt ferrite (CoxFe3-xO4) is a cubic ferrite with inverse spinel nanodimensional structure, particles being very special ones due their magnetically interesting properties. Cobalt ferrite nanopowders were produced using the chemical coprecipitation, an economical synthesis way for ultrafine CoxFe3-xO4 of different compositions (where X = 0.25, 0.5, 0.8, 1.0) and sizes (4-10nm) and hydrothermal method. The powders were characterized by XRD measurements. The main advantage of these two synthesis methods consist in dimensional control of the particle dimensions and form according to the desired magnetic properties. Beside the hydrothermal way provides a higher degree of crystallinity, larger particles and most pronounced magnetic properties.