Poss-containing in-situ composite nanogel with magnetic responsiveness and method for preparing the same
US-2016379742-A1 · Dec 29, 2016 · US
Electromagnetic material and inductance for low temperatures
US12424361B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12424361-B2 |
| Application number | US-202117543693-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 6, 2021 |
| Priority date | Dec 8, 2020 |
| Publication date | Sep 23, 2025 |
| Grant date | Sep 23, 2025 |
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Abstract
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An electromagnetic material for an inductance for operation at cryogenic temperatures including, in an electrically insulating matrix, metal nanoparticles 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.
First claim
Opening claim text (preview).
The invention claimed is: 1. An inductive element comprising an electromagnetic material for an inductance operating at cryogenic temperatures comprising, in an electrically insulating matrix, metal or iron carbides or iron nitrides nanoparticles 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, wherein the inductance value is higher at a temperature less than or equal to 4 K than at room temperature. 2. The inductive element according to claim 1 , wherein each nanoparticle has a size less than or equal to 20 nm. 3. The inductive elemental according to claim 1 , wherein each nanoparticle has a size less than or equal to 10 nm. 4. The inductive element according to claim 1 , wherein the magnetic permeability of each nanoparticle is greater than 3. 5. The inductive element according to claim 1 , wherein the matrix is a polymer. 6. The inductive element according to claim 1 , wherein the matrix is a metal oxide. 7. The inductive element according to claim 1 , wherein the matrix is a graphene oxide. 8. The inductive element according to claim 1 , wherein the nanoparticles comprise iron, cobalt, nickel, and/or an alloy of these metals. 9. The inductive element according to claim 1 , wherein the nanoparticles are iron carbides or nitrides of the group consisting of Fe 3 C, Fe 5 C 2 , Fe 2 N, Fe 4 N, and Fe 16 N 2 . 10. The inductive element according to claim 1 , wherein the nanoparticles are covered with a protective surface layer of inorganic or organic material. 11. The inductive element according to claim 10 , wherein the protective surface layer is made of a material of the group consisting of graphene, graphite, amorphous carbon, metal oxide, and polymer. 12. The inductive element according to claim 1 , wherein the inductance value is higher by 30% at a temperature less than or equal to 4K than at room temperature. 13. The inductive element according to claim 1 , wherein the inductance value is higher by 50% at a temperature less than or equal to 4K than at room temperature. 14. The inductive element according to claim 1 , wherein the inductance value is higher by 100% at a temperature less than or equal to 4K than at room temperature. 15. The inductive element according to claim 1 , wherein the inductance value is higher by 200% at a temperature less than or equal to 4K than at room temperature. 16. An electromagnetic material for an inductance operating at cryogenic temperatures comprising, in an electrically insulating matrix, metal or iron carbides or iron nitrides nanoparticles 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, wherein the matrix is a graphene oxide.
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Classifications
Nanograined materials, i.e. having grain sizes below 100 nm · CPC title
Iron group metals · CPC title
- H01F1/0063Primary
in a non-magnetic matrix, e.g. granular solids (granular films H01F10/007) · CPC title
Coated nanoparticles, e.g. nanoparticles coated with organic surfactant · CPC title
Diamagnetic or paramagnetic materials, i.e. materials with low susceptibility and no hysteresis (H01F1/0036 takes precedence) · CPC title
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- What does patent US12424361B2 cover?
- An electromagnetic material for an inductance for operation at cryogenic temperatures including, in an electrically insulating matrix, metal nanoparticles 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.
- Who is the assignee on this patent?
- Commissariat Energie Atomique
- What technology area does this patent fall under?
- Primary CPC classification H01F1/0063. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 23 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).