Electromagnetic properties of low-temperature-sintered Ba3Co2−xZnxFe24O41 ferrites prepared by solid state reaction method

Abstract Hexagonal ferrites Ba 3 Co 2− x Zn x Fe 24 O 41 ( X =0–2.0) were prepared by a solid state reaction method. The influences of Zn content ( X ) on the Z-type phase formation temperature and specific saturation magnetization were investigated. With a small amount of sintering aids, highly dense hexaferrite ceramics with fine-grained microstructure were obtained after sintering at a relatively low temperature below 900°C. The hexaferrite ceramics show excellent high-frequency properties such as high initial permeability up to 10, high cut-off frequency over 1.1 GHz and good DC resistivity more than 10 9 Ω cm .