04-02-2021 дата публикации
Номер: US20210032121A1
Принадлежит:
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 −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. 1. A multiphase ferrite comprising:{'sub': '2', 'a CoW phase that optionally comprises Ru;'}{'sub': r', '1−r', '2+z', '4, '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 −0.5 to 0.5; and'}{'sub': x+y', 'y', '12−(2/3)x−2y', '19, 'a CoRu-BaM phase having the formula BaCoRuFeO, wherein x is 0 to 2, y is 0.01 to 2; and the Ba is optionally partially replaced by at least one of Sr or Ca.'}2. The multiphase ferrite of claim 1 , wherein the multiphase ferrite comprises:{'sub': '2', '50 to 95 volume percent of the CoW phase;'}1 to 20 volume percent of the CFO phase; and5 to 50 volume percent of the CoRu-BaM phase;all based on the total volume of the multiphase ferrite.3. The multiphase ferrite of claim 1 , wherein the CoW phase comprises Ru.4. A composite comprising:a multiphase ferrite; anda polymer; [{'sub': '2', 'CoW phase that is optionally doped with Ru;'}, {'sub': r', '1−r', '2+z', '4, '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 −0.5 to 0.5; and'}], 'wherein the multiphase ferrite has'}{'sub': x+y', 'y', '12−(2/3)x−2y', '19, 'a CoRu-BaM phase having the formula BaCoRuFeO, wherein x is 0 to 2, y is 0.01 to 2; and the Ba is optionally partially replaced ...
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