Applied magnetic field synthesis and processing of iron nitride magnetic materials
US-2018025841-A1 · Jan 25, 2018 · US
Iron nitride powder with anisotropic shape
US11511344B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11511344-B2 |
| Application number | US-202016737156-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 8, 2020 |
| Priority date | Jan 26, 2015 |
| Publication date | Nov 29, 2022 |
| Grant date | Nov 29, 2022 |
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Abstract
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Techniques are disclosed for milling an iron-containing raw material in the presence of a nitrogen source to generate anisotropically shaped particles that include iron nitride and have an aspect ratio of at least 1.4. Techniques for nitridizing an anisotropic particle including iron, and annealing an anisotropic particle including iron nitride to form at least one α″-Fe16N2 phase domain within the anisotropic particle including iron nitride also are disclosed. In addition, techniques for aligning and joining anisotropic particles to form a bulk material including iron nitride, such as a bulk permanent magnet including at least one α″-Fe16N2 phase domain, are described. Milling apparatuses utilizing elongated bars, an electric field, and a magnetic field also are disclosed.
First claim
Opening claim text (preview).
What is claimed is: 1. A material comprising: an anisotropic particle comprising at least one iron nitride crystal, wherein the anisotropic particle has an aspect ratio of at least 2.2, wherein the aspect ratio comprises the ratio of the length of a longest dimension of the anisotropic particle to the length of a shortest dimension of the anisotropic particle, and wherein the longest dimension and the shortest dimension are substantially orthogonal, wherein the at least on…
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Chemistry & Metallurgy · mapped topic
Operations & Transport · mapped topic
Chemistry & Metallurgy · mapped topic
- B22F9/04Primary
Operations & Transport · mapped topic
Electricity · mapped topic
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- What does patent US11511344B2 cover?
- Techniques are disclosed for milling an iron-containing raw material in the presence of a nitrogen source to generate anisotropically shaped particles that include iron nitride and have an aspect ratio of at least 1.4. Techniques for nitridizing an anisotropic particle including iron, and annealing an anisotropic particle including iron nitride to form at least one α″-Fe16N2 phase domain within…
- Who is the assignee on this patent?
- Univ Minnesota
- What technology area does this patent fall under?
- Primary CPC classification B22F9/04. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Nov 29 2022 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).