Ni–Ti equiatomic co-substitution of hexagonal M-type Ba(NiTi)xFe12−2xO19 ferrites

摘要: Abstract Ionic substitution is considered the most effective way to expand operational frequency of barium hexaferrites. So far, little attention has been paid high level substitutions and their impacts on low temperature sintering behavior. Here, co-substituted equiatomic Ni–Ti M-type ferrites nominal compositions Ba(NiTi) x Fe 12−2x O 19 (  = 0.30, 0.60, 0.90, 1.20) were prepared by a solid state reaction method studied for structural, static magnetic properties. It was found that phase purity hexagonal ferrite does not depend upon amount investigated here. Concomitantly, Bi 2 3 additives are shown in lowering hexaferrite materials. For processed samples, addition enables improved densification from localized liquid formation restricted grain growth its colocation at boundaries. By comparing samples process conditions, effect aid sample microstructure, bulk density ρ ), saturation magnetization M s coercivity H c ) permeability μ ′ ″) made clear.