Ni-Zn ferrite powder was obtained by wet method that was to be coprecipitated the metal nitrates, Fe( NO 3 ) 3 ㆍ 9H 2 O, Ni( NO 3 ) 2 ㆍ 6H 2 O, Zn( NO 3 ) 2 ㆍ 6H 2 O to make a high permeability material. The composition of the ferrite powder was Fe 2 O 3 52 mol%, NiO 14.4 mol%, ZnO 33.6 mol%. Ni-Zn ferrite powder was compounded by precipitating metal nitrates with NaOH in vessel at the synthetic temperature of 90 ? C for 8 hours. Calcination temperature and sintering temperature were 700 ? C and 1150 ? C ~ 1250 ? C , respectively, for 2 hours. And the other ferrite powder was also prepared by the wet ball milling that was to be mixed the metal oxides as same as the above chemical composition. We studied the properties of the powder and the electromagnetic characteristics of the sintered cores obtained from there two different processes. Wet direct process produced smaller particle size with narrower distribution of the size and more purified ferrite whose sintered cores had high permeability and high magnetization.