J. Phys. IV France 07 (1997) C1-241-C1-242
Densification, Grain Growth and Microstructure of Ni-Zn FerritesB. Parvatheeswara Rao, P.S.V. Subba Rao and K.H. Rao
Department of Physics, Andhra University, Visakhapatnam 530003, India
Ni0.65 Zn0.35 Fe2 O4, with high density and fine grain size, is a desirable composition for applications of high frequency switching power supplies. This composition has been studied under different sintering conditions. Observed changes in density, grain size and microstructure in these ferrites have been correlated to the volatilization of zinc from the samples at elevated sintering temperatures. Densification and grain growth are observed to be Arrhenius controlled rate processes with activation energies of 63.9 and 64.4 Kcal/mole respectively.
© EDP Sciences 1997