Rogers Corporation

Qifan Li

Yajie Chen

Lance Young

Megan Hott

In an aspect, a ferrite composition can comprise a SbCo—M-type ferrite having the formula: MeSbCoM'FeO, wherein Me is at least one of Sr, Pb, or Ba; M′ is at least one of Ti, Zr, Ru, or Ir; x is 0.001 to 0.3; and y is 0.8 to 1.3. In another aspect, a method of making the ferrite composition comprises mixing ferrite precursor compounds comprising Me, Fe, Sb, Co, and M′; and sintering the ferrite precursor compounds in an oxygen atmosphere to form the SbCo—M-type ferrite. In yet another aspect, a composite comprises the ferrite composition and a polymer. In still another aspect, an article comprises the ferrite composition.

M-type hexaferrite comprising antimony

In an aspect, a CoZ-type ferrite comprises oxides of at least Me, Co, Mo, Li, and Fe; wherein Me is at least one of Ba or Sr. In another aspect, the CoZ-type ferrite comprises a Z-type hexaferrite an amount of lithium molybdate. In another aspect, the CoZ-type ferrite has a formula LiMoO·BaSrCoMe'Me″FeO, wherein Me′ is at least one of Ti, Mo, Ru, Ir, Zr, or Sn; Me″ is at least one of Zn, Mn, or Mg; x is 0 to 3; y is 0 to 1.8; z is 0 to 1.8; and m is −4 to 4. In yet another aspect, a method of making a CoZ-type ferrite comprises milling an initial CoZ-type ferrite and LiMoOto form a mixed ferrite; and calcining the mixed ferrite to form the CoZ-type ferrite.

Low loss magnetodielectric material

In an aspect, a ferrite composition comprises a BiRuCo-M-type ferrite having the formula MeBiCoRuFeO, wherein Me is at least one of Sr, Pb, or Ba; x is 0.01 to 0.5; y is 0.1 to 2; z is 0 to 4, and t is 0 to 4; wherein the Co can be at least partially replaced by at least one of Zn, Cu, or Mg by an amount of less than y, and the Ru can be at least partially replaced by at least one of Ti, Sn, or Zr, where the substitution amount is not more than z or is less than z.

Bismuth ruthenium M-type hexaferrite

In an aspect, a multiphase ferrite comprises a CoW phase that is optionally doped with Ru; a CFO phase having the formula Me'CoFeO, wherein Me' is at least one of Ni, Zn, or Mg, r is 0 to 0.5, and z is &#x2212;0.5 to 6 0.5; and a CoRu-BaM phase having the formula BaCoRuFeO, wherein x is 0 to 2, y is 0.01 to 2; and the Ba can be partially replaced by at least one of Sr or Ca. In another aspect, a composite can comprise a polymer and the multiphase ferrite. In yet another aspect, a method of making a multiphase ferrite can comprise mixing and grinding a CoRu-BaM phase ferrite and a CFO phase ferrite to form a mixture; and sintering the mixture in an oxygen atmosphere to form the multiphase ferrite.

Multiphase ferrites and composites comprising the same

In an aspect, a ferrite composition comprises a Ru&#x2014;CoZ ferrite having the formula: (BaM)Co(M'Ru)FeO, wherein M is at least one of Sr, Pb, or Ca; M&#x2032; is at least one of Co, Zn, Mg, or Cu; x is 1 to 3; y is greater than 0 to 2; and z is &#x2212;4 to 4. In another aspect, an article comprises the ferrite composition. In yet another aspect, method of making the ferrite composition comprises mixing ferrite precursor compounds comprising Fe, Ba, Co, and Ru; and sintering the ferrite precursor compounds in an oxygen atmosphere to form the Ru&#x2014;CoZ ferrite.

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Wuhan, China

Qifan Li