This work presents the study of the synthesis for combustion reaction and sintering of Ni-Zn nanometric ferrite powders. The effect of the concentration of Zn2+ in the system Ni1-xZn xFe2O4 was investigated. The resulting powders of the combustion were characterized by DRX, BET, MEV, picnometry of helium and sedimentation (Horiba). Uniaxially pressed samples were sintered with constant heating rate (TCA) of 5.0 ºC/min from 600 ºC to the temperature of 1200 ºC, in a horizontal dilatometer. The compact ones were characterized by scanning electron microscopy. The results show that was possible to obtain Ni-Zn ferrite powders with particle size among 18 - 27 nm using combustion reaction synthesis. During sintering of the nanometric powders it was observed three different stages, which were identified through the Theory of Bannister. The addition of Zn2+ didn't modify the sintering mechanism in the three stages. For the initial and final stages the predominant mechanism was for viscous flow, attributed to the structural rearrangement of the nanoparticles and for the intermediate stage the mechanism was volumetric diffusion.
sintering; Ni-Zn ferrites Ni-Zn; combustion reaction
