US 12,230,437 B2
Freeze-cast magnetic flake composites
Bradley A. Reese, Boylston, MA (US); Ulrike G. K. Wegst, Hanover, NH (US); and Charles R. Sullivan, Hanover, NH (US)
Assigned to Trustees of Dartmouth College, Hanover, NH (US)
Filed by Trustees of Dartmouth College, Hanover, NH (US)
Filed on Apr. 20, 2023, as Appl. No. 18/137,051.
Application 18/137,051 is a continuation of application No. 16/855,938, filed on Apr. 22, 2020, abandoned.
Claims priority of provisional application 62/837,071, filed on Apr. 22, 2019.
Prior Publication US 2023/0352237 A1, Nov. 2, 2023
Int. Cl. H01F 41/02 (2006.01); B22F 1/068 (2022.01); B22F 1/10 (2022.01); B22F 3/00 (2021.01); B22F 3/22 (2006.01); H01F 7/02 (2006.01)
CPC H01F 41/0206 (2013.01) [B22F 3/003 (2013.01); B22F 3/222 (2013.01); H01F 7/0278 (2013.01); B22F 1/068 (2022.01); B22F 1/10 (2022.01)] 20 Claims
OG exemplary drawing
 
1. A method of making a magnetic composite, said method comprising:
applying a uniform magnetic field to a mixture comprising a solvent, a binder, and at least one magnetic material in a container to cause a first uniform alignment of the at least one magnetic material in a direction of the uniform magnetic field;
directionally solidifying the solvent in the mixture to form solvent crystals, while applying the uniform magnetic field, to cause a second uniform alignment of the at least one magnetic material in a direction of solvent crystal growth; and
removing the solvent crystals in the container,
wherein the method results in the formation of the magnetic composite comprising a binder and the uniformly aligned at least one magnetic material.