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US 2018/0340994 A1Published application
Magnets for Magnetic Resonance Applications
AssigneeElegant Mathematics LLC
InventorsOlena Ibragimova, Ilgiz Ibragimov
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Abstract
The invention pertains to advances in constructing predetermined magnets from appropriate magnetic material that allows for focusing the magnetic field in a target region.
Claims13
1:
- A method for constructing permanent magnet(s) with non-uniform magnetic polarization, comprising of:
- a. a set of one or several materials for creating and adjusting a magnetic field:
- b. permanent magnets, and/or
- c. ferromagnetic materials, and/or
- d. permanent electromagnets, and/or
- e. superconductor electromagnets, and/or
- f. any other non-magnetic materials, and/or
- g. permanent magnet(s) previously manufactured with the same technology,
- h. a magnetic material that can be anisotropically magnetized,
- whereby
- i. said magnetic material is situated in an area with a non-uniform magnetic polarization being constructed by means of a configuration of said materials for creating and adjusting a magnetic field,
- j. said magnetic material situated in said magnetic field is treated by any method for magnet formation,
- k. said constructed permanent magnet with said non-uniform magnetic polarization, if fully magnetized, should form a permanent magnetic field on at least one point outside said constructed permanent magnet with field strength greater than maximally achievable on a surface of an infinitely large bulk of the same magnetic material with linear anisotropic magnetization.
10 more elements
2:
- The method of claim 1 wherein
- a. said magnetic material g20 is comprised of magnetic powder,
- b. said magnetic powder is situated in a molding matrix g19,
- c. a molding tool g18 acts on said magnetic powder to reduce its volume and form a molded magnet.
1 more element
3:
- The method of claim 1 wherein
- a. said magnetic material is diluted with a fluid and/or lubricant and/or low-melting material, and/or
- b. said magnetic material is stressed with ultrasonic and/or any other vibration(s), and/or
- c. said magnetic material is melted and, after melting, slowly crystallized.
1 more element
4:
- The method of claim 1 wherein
- a. said magnetic material is melted and, after melting, crystallized, whereby
- b. heating for melting is performed by:
- c. resistive heating of one or several coils, and/or
- d. inductive heating of casted material, and/or
- e. inductive heating of a conductive crucible and/or a crucible with inductive sensing part(s), and/or
- f. resistive heating of casted material, and/or
- g. the additional application of one or several said permanent electromagnet(s) as resistive and/or inductive heater(s).
5 more elements
5:
- The method of claim 1 wherein said non-uniform magnetic polarization forming inside said constructed magnet is similar to a Halbach array and/or equal to one of the magnetic shapes g7, g8, g9, g10, g11, g12, g35, g36, g37.
6:
- The method of claim 1 additionally comprising the second part with pulse electromagnets constructed with similar configuration as said permanent magnets, and/or said permanent electromagnets are used to magnetize said constructed magnet to its full magnetic strength.
7:
- A method for the extension of the working lifespan of in-situ NMR spectrometers, comprising of the method of claim 6 with physical dimensions suitable to install depleted magnets from an in-situ NMR spectrometer into the area where magnetization is performed.
8:
- A magnetic alloy, comprising:
- a. crystals of Co—Fe and/or Sm—Co magnetic alloys g32;
- b. crystals of Mn—Bi and/or Mn—Al and/or any other bismuth based magnetic alloys g33;
- c. low-melting metals g34 that are able to make low-temperature liquids with (b), wherein a material phase of the alloy is metallic.
1 more element
9:
- A permanent magnet(s) based on the metallic alloy of claim 8 with non-uniform magnetic polarization that, if fully magnetized, should form a permanent magnetic field on at least one point outside said constructed permanent magnet with strength greater than that maximally achievable on a surface of an infinitely large bulk of the same magnetic material with linear anisotropic magnetization.
10:
- The metallic alloy of claim 8, wherein the material can be casted and produce a magnetic field with said crystals (a) at below 500° C.
11:
- The metallic alloy of claim 8, wherein the material can be sintered and produce a magnetic field with said crystals (a) at below 1000 bar.
12:
- The metallic alloy of claim 8, wherein
- a. said crystals of Co—Fe have formula CoxFe1-x, where x∈[0.2, 0.8];
- b. said crystals of Sm—Co have formula CoxSm1-x, where x∈[0.8, 0.9].
13:
- The metallic alloy of claim 8, wherein said low-melting metals g34 include one or several chemical elements selected from the group consisting of In, Bi, Sn, Ga, Tl, Cd, Zn, Pb, Te.