Low‐Temperature Sintering, Densification, and Properties of Z‐type Hexaferrite with Bi ₂ O ₃ Additives

Abstract

The effect of the addition of Bi 2 O 3 on the densification, low‐temperature sintering, and electromagnetic properties of Z‐type planar hexaferrite was investigated. The results show that Bi 2 O 3 additives can improve the densification and promote low‐temperature sintering of Z‐type hexaferrite prepared by a solid‐state reaction method. The presence of Bi 2 O 3 in the grain boundaries and the generation of Fe 2+ degrade the initial permeability of the samples but make the quality factor and cut‐off frequency increase. Various possible mechanisms involved in generating these effects were also discussed.