M-type hexaferrite having a planar anisotropy
AssigneeRogers Corporation
InventorsYajie Chen, Yu Wang
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Abstract
In an aspect, an M-type ferrite comprises an element Me comprising at least one of Ba, Sr, or Pb; an element Me′ comprising at least one of Ti, Zr, Ru, or Ir; and an element Me″ comprising at least one of In or Sc. In another aspect, a method of making the M-type ferrite can comprise milling ferrite precursor compounds comprising oxides of at least Co, Fe, Me, M3′, and Me″ to form an oxide mixture; wherein Me comprises at least one of Ba, Sr, or Pb; Me′ is at least one of Ti, Zr, Ru, or Ir; and Me″ is at least one of In or Sc; and calcining the oxide mixture in an oxygen or air atmosphere to form the ferrite.
Claims23
A ferrite, wherein the ferrite comprises:
- an element Me comprising at least one of Ba, Sr, or Pb;
- an element Me′ comprising at least one of Ti, Zr, Ru, or Ir;
- and
- an element Me″ comprising at least one of In or Sc;
- and
- wherein the ferrite is an M-type ferrite.
A method of making a ferrite comprising:
- milling ferrite precursor compounds comprising oxides of at least Co, Fe, Me, Me′, and Me″ to form an oxide mixture;
- wherein Me comprises at least one of Ba, Sr, or Pb;
- Me′ is at least one of Ti, Zr, Ru, or Ir;
- and Me″ is at least one of In or Sc;
- and
- calcining the oxide mixture in an oxygen or air atmosphere to form the ferrite.
Dependencies are inferred from the claim text.