M-type hexaferrite comprising a low dielectric loss ceramic
AssigneeRogers Corporation
InventorsYajie Chen, Yu Wang
Life of this patent
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Abstract
In an aspect, an M-type ferrite, comprises oxides of Me, Me′, Me″, Co, Ti, and Fe; wherein Me is 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 Mg or Ca. In another aspect, a method of making an M-type ferrite comprises milling ferrite precursor compounds comprising oxides of at least Co, Fe, Ti, 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 Mg or Ca; and calcining the oxide mixture in an oxygen or air atmosphere to form the M-type ferrite.
Claims22
An M-type ferrite, comprising:
- a magnetic phase having the formula
- MeCoxMe′xFe12-2xO19,
- wherein Me is at least one of Ba, Sr, or Pb,
- Me′ is at least one of Ti, Zr, Ru, or Ir, and
- x is 0, 1 to 2, and
- a dielectric phase having the formula Me″TiO3, wherein Me″ is at least one of Me or Ca.
Dependencies are inferred from the claim text.