Polycrystalline ferrites have very important structural, magnetic and electrical properties that are dependent on several factors such as method of preparation, stoichiometry, substitution of cations, sintering temperature, sintering time, sintering atmosphere, etc. NiCuZn ferrite is one of the most important magnetic materials for multilayer chip inductor (MLCI) applications due to their high electrical resistivity, low sintering temperature and high permeability. In view of this in the present book stands for, single phase NiCuZn ferrites have been prepared at low temperature (without sintering aids) by both conventional and microwave sintering techniques and studies on structural, magnetic and electrical properties are presented.