▎ 摘　　要

NOVELTY - Preparing Z-type hexagonal ferrite ultrafine powder, involves: (i) mixing soluble metal salt containing ferric ion (Fe3+), soluble metal salt containing barium ion (Ba2+) and soluble metal salt containing substituted metal ion with water to obtain first mixed solution; (ii) mixing first mixed solution with complexing agent to obtain second mixed solution; and (iii) adding pH regulator to second mixed solution, and allowing to stand to obtain third mixed solution; (iv) mixing third mixed solution with hexagonal material, drying and carrying out heat treatment to obtain Z-type hexagonal ferrite ultrafine powder. USE - The method is useful for preparing Z-type hexagonal ferrite ultrafine powder. ADVANTAGE - The method: has low production cost, simple technique process, low device requirement and good industrial application prospect.