| 简介 |
Provided is a magnetic powder producing method comprising : a step of obtaining a raw material composite; a step of calcining the raw material composite at a temperature of 600-1350° C to obtain a calcined material containing hexaferrite and particles with protruded defects on the surface indicated by the following [Formula 1] : A1-xR_xFe_12-yM_yO_19 wherein A is Sr, Ba, Ca, or a combination thereof; R is at least one or more types selected from a rare-earth element; and Bi. The M is at least one or more types selected from Co, Mn, Zn, Zr, Ni, Ti, Cu, Al, Ge, and As; and the formula satisfies 0 (b) SrFe_12O_19 after processing HCl(a) SrFe_12O_19 after calcinationCOPYRIGHT KIPO 2015 |
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