Novel multifferoic r-type hexaferrite, a composite and an article comprising the r-type hexaferrite, and a method of making the same
AssigneeRogers Corporation
InventorsYajie Chen, Qifan Li
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Abstract
In an aspect, an R-type ferrite has the formula: Me′3Me2TiFe12O25, wherein Me′ is at least one of Ba2+ or Sr2+ and Me is at least one of Co2+, Mg2+, Cu2+, or Zn2+. In another aspect, a composite or an article comprises the R-type ferrite. In yet another aspect, a method of making a R-type ferrite comprises milling ferrite precursor compounds comprising oxides of at least Fe, Ti, Me, and Me′, to form an oxide mixture; wherein Me′ comprises at least one of Ba2+ or Sr2+; Me is at least one of Co2+, Mg2+, Cu2+, or Zn2+; and calcining the oxide mixture in an oxygen or air atmosphere to form the R-type ferrite.
Claims16
An R-type ferrite, having the formula:
- Me′3Me2TiFe12O25
- wherein Me′ is at least one of Ba2+ or Sr2+ and Me is at least one of Co2+, Mg2+, Cu2+, or Zn2+.
A method of making a R-type ferrite comprising:
- milling ferrite precursor compounds comprising oxides of at least Fe, Ti, Me, and Me′, to form an oxide mixture;
- wherein Me′ comprises at least one of Ba2+ or Sr2+;
- Me is at least one of Co2+, Mg2+, Cu2+, or Zn2+;
- and
- calcining the oxide mixture in an oxygen or air atmosphere to form the R-type ferrite.
Dependencies are inferred from the claim text.