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    High frequency magnetic films, method of manufacture, and uses thereof
    11.
    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.

    LOW LOSS MAGNETODIELECTRIC MATERIAL
    12.
    发明申请
    LOW LOSS MAGNETODIELECTRIC MATERIAL 有权

    公开(公告)号：US20220367093A1

    公开(公告)日：2022-11-17

    申请号：US17741746

    申请日：2022-05-11

    Applicant: ROGERS CORPORATION

    Inventor： Yajie Chen ,  Lance Young ,  Qifan Li ,  Megan Hott

    IPC: H01F1/34 ,  C04B35/26 ,  C04B35/626 ,  C04B35/64 ,  C08K3/22

    Abstract: In an aspect, a Co2Z-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 Co2Z-type ferrite comprises a Z-type hexaferrite an amount of lithium molybdate. In another aspect, the Co2Z-type ferrite has a formula Li2MoO4.BaxSr3-xCo2+y−zMe′yMe″zFe24-2y-mO41, 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 Co2Z-type ferrite comprises milling an initial Co2Z-type ferrite and Li2MoO4 to form a mixed ferrite; and calcining the mixed ferrite to form the Co2Z-type ferrite.

    MULTIPHASE FERRITES AND COMPOSITES COMPRISING THE SAME
    13.
    发明申请
    MULTIPHASE FERRITES AND COMPOSITES COMPRISING THE SAME 有权

    公开(公告)号：US20210032121A1

    公开(公告)日：2021-02-04

    申请号：US16938396

    申请日：2020-07-24

    Applicant: ROGERS CORPORATION

    Inventor： Qifan Li ,  Yajie Chen

    IPC: C01G49/00 ,  C08L27/12 ,  C08L23/00 ,  C08L61/16 ,  C08L81/02 ,  H01F1/34

    Abstract: In an aspect, a multiphase ferrite comprises a Co2W phase that is optionally doped with Ru; a CFO phase having the formula Mer“Co1−rFe2+zO4, 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 BaCox+yRuyFe12−(2/3)x−2yO19, 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.

    Multi-layer magneto-dielectric material
    16.
    发明授权
    Multi-layer magneto-dielectric material 有权

    公开(公告)号：US11626228B2

    公开(公告)日：2023-04-11

    申请号：US15850466

    申请日：2017-12-21

    Applicant: Rogers Corporation

    Inventor： Karl E. Sprentall ,  Aniruddha J. Shere ,  Yajie Chen ,  Murali Sethumadhavan

    IPC: H01F10/26 ,  H01F10/14 ,  H01F10/30 ,  H01Q9/04 ,  H05K1/03 ,  H01Q1/38

    Abstract: A magneto-dielectric material operable between a minimum frequency and a maximum frequency, having: a plurality of layers that alternate between a dielectric material and a ferromagnetic material, lowermost and uppermost layers of the plurality of layers each being a dielectric material; each layer of the plurality of ferromagnetic material layers having a thickness equal to or greater than 1/15th a skin depth of the respective ferromagnetic material at the maximum frequency, and equal to or less than ⅕th the skin depth of the respective ferromagnetic material at the maximum frequency; each layer of the plurality of dielectric material layers having a thickness and a dielectric constant that provides a dielectric withstand voltage across the respective thickness of equal to or greater than 150 Volts peak and equal to or less than 1,500 Volts peak; and, the plurality of layers having an overall thickness equal to or less than one wavelength of the minimum frequency in the plurality of layers.

    Ruthenium doped Z-type hexaferrite
    17.
    发明授权
    Ruthenium doped Z-type hexaferrite 有权

    公开(公告)号：US11476021B2

    公开(公告)日：2022-10-18

    申请号：US16941707

    申请日：2020-07-29

    Applicant: ROGERS CORPORATION

    Inventor： Qifan Li ,  Yajie Chen

    IPC: H01F1/34 ,  C01G51/00 ,  C08K3/22 ,  C04B35/26 ,  C01G49/00 ,  H01F1/37

    Abstract: In an aspect, a ferrite composition comprises a Ru—Co2Z ferrite having the formula: (Ba3-xMx)Co2(M′Ru)yFe24-2y-zO41, wherein M is at least one of Sr, Pb, or Ca; M′ 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 −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—Co2Z ferrite.

    MAGNETO-DIELECTRIC MATERIALS, METHODS OF MAKING, AND USES THEREOF
    18.
    发明申请
    MAGNETO-DIELECTRIC MATERIALS, METHODS OF MAKING, AND USES THEREOF 有权

    公开(公告)号：US20210020343A1

    公开(公告)日：2021-01-21

    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

    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.

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