Abstract: Spinel Ni-Zn ferrite with composition Ni_1-xZn_xFe₂O₄（x=0.0-0.7） were prepared by EDTA-complexing method using their corresponding metal nitrates as raw materials.The synthesis process was monitored by thermogravimetric and differential thermal analysis（TG-DTA）.The obtained samples were characterized by X-ray diffraction（XRD）,Fourier transform infrared spectroscopy（FT-IR）,scanning electron microscope（SEM） and vibrating sample magnetometer（VSM）.The effects of calcination temperature and zinc substitution concentration on crystal structure and magnetic properties were studied.A single phase Ni-Zn ferrite with high crystallinity was completely formed at relatively lower temperature（700 ℃） and shorter reaction time（2h）,compared with conventional solid state reaction（1300 ℃/20h）.With the increase of zinc concentration,lattice parameter increases,while the coercivity（Hc） and Curie temperature（Tc） decreases monotonously.Saturation magnetization（Ms） showed an increasing trend up to x=0.4 and then a decline with increasing zinc concentration.Exposed in the 1.5MHz AC magnetic filed,the induction temperature of the obtained particles approached the designed Cure point,which would be useful as susceptor materials for induction heating.