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    Magnetic particles, methods of making, and uses thereof
    1.
    发明授权
    Magnetic particles, methods of making, and uses thereof 有权

    公开(公告)号：US11476022B2

    公开(公告)日：2022-10-18

    申请号：US17000610

    申请日：2020-08-24

    Applicant: ROGERS CORPORATION

    Inventor： Li Zhang ,  Yajie Chen

    IPC: H01F1/34 ,  C09C1/24 ,  C08K9/02 ,  C08K3/22 ,  C23C18/34

    Abstract: In an aspect, a composition comprises a plurality of magnetic particles. The magnetic particles each independently comprise a nickel ferrite core having the formula Ni1−xMxPe2+yO4, wherein M is at least one of Zn, Mg, Co, Cu, Al, Mn, or Cr; x is 0 to 0.95, and y=−0.5 to 0.5; and an iron nickel shell at least partially surrounding the core, wherein the iron nickel shell comprises iron, nickel, and optionally M. In another aspect, a method of forming the magnetic particles comprises heat treating a plurality of nickel ferrite particles in a hydrogen atmosphere to form the plurality of magnetic particles having the iron nickel shell on the nickel ferrite core. In yet another aspect, a composite can comprise the magnetic particles and a polymer.

    MAGNETIC PARTICLES, METHODS OF MAKING, AND USES THEREOF
    2.
    发明申请
    MAGNETIC PARTICLES, METHODS OF MAKING, AND USES THEREOF 有权

    公开(公告)号：US20210065943A1

    公开(公告)日：2021-03-04

    申请号：US17000610

    申请日：2020-08-24

    Applicant: ROGERS CORPORATION

    Inventor： Li Zhang ,  Yajie Chen

    IPC: H01F1/34 ,  C09C1/24 ,  C08K9/02 ,  C08K3/22

    Abstract: In an aspect, a composition comprises a plurality of magnetic particles. The magnetic particles each independently comprise a nickel ferrite core having the formula Ni1−xMxPe2+yO4, wherein M is at least one of Zn, Mg, Co, Cu, Al, Mn, or Cr; x is 0 to 0.95, and y=−0.5 to 0.5; and an iron nickel shell at least partially surrounding the core, wherein the iron nickel shell comprises iron, nickel, and optionally M. In another aspect, a method of forming the magnetic particles comprises heat treating a plurality of nickel ferrite particles in a hydrogen atmosphere to form the plurality of magnetic particles having the iron nickel shell on the nickel ferrite core. In yet another aspect, a composite can comprise the magnetic particles and a polymer.

    HIGH FREQUENCY MAGNETIC FILMS, METHOD OF MANUFACTURE, AND USES THEREOF
    3.
    发明申请
    HIGH FREQUENCY MAGNETIC FILMS, METHOD OF MANUFACTURE, AND USES THEREOF 审中-公开

    公开(公告)号：US20200161034A1

    公开(公告)日：2020-05-21

    申请号：US16676736

    申请日：2019-11-07

    Applicant: ROGERS CORPORATION

    Inventor： Yajie Chen ,  Xiaoyu Zhang ,  Li Zhang ,  Yuanyuan Xing

    IPC: H01F1/16 ,  H01F1/38 ,  H01F41/18 ,  H01F41/32

    Abstract: A multilayer film includes a substrate; a first magnetic layer disposed on the substrate and a second magnetic layer disposed on the first magnetic layer. The first magnetic layer includes Fe(50-80)N(10-20)B(1-20)M(0-10), wherein M is Si, Ta, Zr, Ti, Co, or a combination thereof. The second magnetic layer includes Fe(50-90)N(10-50) or Fe(60-90)N(1-10)Ta(5-30). The multilayer magnetic film has, over a frequency range of 50 MHz to 10 GHz, a magnetic permeability of greater than or equal to 1800 over a selected frequency band in the frequency range; a magnetic loss tangent of less than or equal to 0.3 over a selected frequency band in the frequency range; and a cutoff frequency of greater than or equal to 1 GHz, or greater than or equal to 2 GHz.

    Z-TYPE HEXAFERRITE HAVING A NANOCRYSTALLINE STRUCTURE
    5.
    发明申请
    Z-TYPE HEXAFERRITE HAVING A NANOCRYSTALLINE STRUCTURE 有权

    公开(公告)号：US20210261433A1

    公开(公告)日：2021-08-26

    申请号：US17166352

    申请日：2021-02-03

    Applicant: ROGERS CORPORATION

    Inventor： Yajie Chen ,  Li Zhang ,  Shawn Williams

    IPC: C01G51/00 ,  C08K3/22 ,  H01F1/34

    Abstract: In an aspect, a Co2Z ferrite has the formula: (Ba1−xSrx)3Co2+yMyFe24−2y−zO41. M is at least one of Mo, Ir, or Ru. The variable x can be 0 to 0.8, or 0.1 to 0.8. The variable y can be 0 to 0.8, or 0.01 to 0.8. The variable z can be −2 to 2. The Co2Z ferrite can have an average grain size of 5 to 100 nanometers, or 30 to 80, or 10 to 40 nanometers as measured using at least one of transmission electron microscopy, field emission scanning electron microscopy, or x-ray diffraction.

    Magneto-dielectric materials, methods of making, and uses thereof
    6.
    发明授权
    Magneto-dielectric materials, methods of making, and uses thereof 有权

    公开(公告)号：US11574752B2

    公开(公告)日：2023-02-07

    申请号：US16930907

    申请日：2020-07-16

    Applicant: ROGERS CORPORATION

    Inventor： Yajie Chen ,  Robert C. Daigle ,  Li Zhang

    IPC: H01F1/34 ,  C01G53/00 ,  C08K3/22 ,  C08K7/08 ,  C08K9/02 ,  D01D5/06 ,  D01D10/02

    Abstract: A magnetic fiber comprises a core comprising a spinel ferrite of formula Me1-xMxFeyO4, wherein Me is Mg, Mn, Fe, Co, Ni, Cu, Zn, or a combination thereof, x=0 to 0.25, and y=1.5 to 2.5, wherein the core is solid or at least partially hollow; and a shell at least partially surrounding the core, and comprising a Me1-xMxFey alloy, wherein when the core is solid with Me=Ni and x=0 the magnetic fiber has a diameter of greater than 0.3 micrometer. A magneto-dielectric material having a magnetic loss tangent of less than or equal to 0.03 at 1 GHz comprises a polymer matrix; and a plurality of the magnetic fibers.

    High frequency magnetic films, method of manufacture, and uses thereof
    10.
    发明授权
    High frequency magnetic films, method of manufacture, and uses thereof 有权

    公开(公告)号：US11682509B2

    公开(公告)日：2023-06-20

    申请号：US16676736

    申请日：2019-11-07

    Applicant: ROGERS CORPORATION

    Inventor： Yajie Chen ,  Xiaoyu Zhang ,  Li Zhang ,  Yuanyuan Xing

    IPC: H01F1/16 ,  H01F1/38 ,  H01F41/18 ,  H01F41/32

    CPC classification number: H01F1/16 ,  H01F1/38 ,  H01F41/18 ,  H01F41/32 ,  Y10T428/32

    Abstract: A multilayer film includes a substrate; a first magnetic layer disposed on the substrate and a second magnetic layer disposed on the first magnetic layer. The first magnetic layer includes Fe(50-80)N(10-20)B(1-20)M(0-10), wherein M is Si, Ta, Zr, Ti, Co, or a combination thereof. The second magnetic layer includes Fe(50-90)N(10-50) or Fe(60-90)N(1-10)Ta(5-30). The multilayer magnetic film has, over a frequency range of 50 MHz to 10 GHz, a magnetic permeability of greater than or equal to 1800 over a selected frequency band in the frequency range; a magnetic loss tangent of less than or equal to 0.3 over a selected frequency band in the frequency range; and a cutoff frequency of greater than or equal to 1 GHz, or greater than or equal to 2 GHz.

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