Compression-bonded magnet with case and method for producing the same
US-9818521-B2 · Nov 14, 2017 · US
Magnet powder, bond magnet and motor
US9767945B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9767945-B2 |
| Application number | US-201514678284-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 3, 2015 |
| Priority date | Apr 15, 2014 |
| Publication date | Sep 19, 2017 |
| Grant date | Sep 19, 2017 |
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Abstract
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A magnet powder having a composition composed of R (R consists of R1 and R2, R1 represents at least one rare earth element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Er, Tm, Yb and Lu, R2 represents at least one rare earth element selected from the group consisting of Ho and Gd). T (T represents at least one transition metal element containing Fe or the combination of Fe and Co as essential element(s)) and B, wherein, the atomic ratio of R2/(R1×R2) is 0.05 to 0.1, the ratio of R/T is 0.25 to 0.35, and the magnet powder has an average primary particle size of 45 to 100 nm. The present invention also provides a bond magnet using the magnet powder.
First claim
Opening claim text (preview).
What is claimed is: 1. A magnet powder consisting of R, T and B, wherein, R consists of R1 and R2, R1 represents at least one rare earth element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Er, Tm, Yb and Lu, R2 represents at least one rare earth element selected from the group consisting of Ho and Gd, T represents at least one transition metal element containing Fe or a combination of Fe and Co, the atomic ratio of R2 to the sum of R1 and R2 is 0.05 to 0.1, the atomic ratio of R to T is 0.25 to 0.35, and the powder has an average primary particle size of 4 to 100 nm. 2. A bond magnet in which the magnet powder of claim 1 is used. 3. A motor in which the magnet of claim 2 is used.
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- H01F1/0578Primary
bonded together · CPC title
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- What does patent US9767945B2 cover?
- A magnet powder having a composition composed of R (R consists of R1 and R2, R1 represents at least one rare earth element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Er, Tm, Yb and Lu, R2 represents at least one rare earth element selected from the group consisting of Ho and Gd). T (T represents at least one transition metal element containing Fe or the combination…
- Who is the assignee on this patent?
- Tdk Corp
- What technology area does this patent fall under?
- Primary CPC classification H01F1/0578. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 19 2017 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).