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  • 专利标题:   Electromagnetic material for inductance operating at cryogenic temperatures, comprises metal nanoparticles in electrically insulating matrix, where matrix is polymer, metal oxide, or graphene oxide and particles comprise iron, cobalt, nickel, or alloy of these metals.
  • 专利号:   US2022181053-A1, EP4012728-A1, CN114628103-A, FR3117260-A1, FR3117260-B1
  • 发明人:   VIALA B, BERNARD V
  • 专利权人:   COMMISSARIAT ENERGIE ATOMIQUE, COMMISSARIAT ENERGIE ATOMIQUE, ATOMIC ENERGY ALTERNATIVE ENERGY COMMI, COMMISSARIAT ENERGIE ATOMIQUE
  • 国际专利分类:   C04B035/52, C08K003/14, C08K003/28, H01F001/00, H01F001/147, H01F017/04, H01F003/08, H01F041/16, H01F041/24, H01F001/14, H01F001/34, H01F001/42, B82Y030/00
  • 专利详细信息:   US2022181053-A1 09 Jun 2022 H01F-001/147 202256 English
  • 申请详细信息:   US2022181053-A1 US543693 06 Dec 2021
  • 优先权号:   FR012856

▎ 摘　　要

NOVELTY - Electromagnetic material 19 comprises metal nanoparticles 23 with superparamagnetic behavior of size less than or equal to 30 nm and having a magnetic permeability greater than or equal to 1.5 for a frequency between 5 GHz and 50 GHz in an electrically insulating matrix 25. USE - Electromagnetic material used in inductive element for inductance operating at cryogenic temperatures. ADVANTAGE - The electromagnetic material has magnetic metal particles, which present superparamagnetic behavior of size less than or equal to 30 nm and a magnetic permeability greater than or equal to 1.5 for a frequency between 5 GHz and 50 GHz, that is their magnetization spontaneously reverse under the influence of temperature, and covered with protective film or protective shell to protect them from oxidation. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an inductive element, which comprises an electromagnetic material, which has inductance value higher by 10%, 30%, 50%, 100%, or 200% at a temperature less than or equal to 4 K than at room temperature. DESCRIPTION OF DRAWING(S) - The drawing shows cross-sectional view of a magnetic material. Electromagnetic material (19) Substrate (21) Magnetic metal particles (23) Electrically insulating matrix (25)