Method for producing sintered ferrit magnet, and sintered ferrite magnet
US-2015332819-A1 · Nov 19, 2015 · US
Ferrite sintered magnet, ferrite particles, bonded magnet, motor, and generator
US2019318856A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2019318856-A1 |
| Application number | US-201716469833-A |
| Country | US |
| Kind code | A1 |
| Filing date | Dec 22, 2017 |
| Priority date | Dec 22, 2016 |
| Publication date | Oct 17, 2019 |
| Grant date | — |
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Abstract
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Provided is a ferrite sintered magnet including a ferrite phase having a magnetoplumbite-type crystal structure. x, y, and m satisfy the following Equations (1), (2), and (3) when composition of the ferrite sintered magnet is represented by R 1-x A x Fe m-y Co y , where R denotes at least one kind of element selected from rare earth elements including Y and A denotes Ca or Ca and elements including at least one kind selected from Sr or Ba. The content of B in the ferrite sintered magnet is from 0.1% to 0.6% by mass in terms of B 2 O 3 . 0.2≤ x ≤0.8 (1) 0.1≤ y ≤0.65 (2) 3≤ m <14 (3)
First claim
Opening claim text (preview).
1 : A ferrite sintered magnet comprising a ferrite phase having a magnetoplumbite-type crystal structure, wherein x, y, and m satisfy the following Equations (1), (2), and (3) when composition of the ferrite sintered magnet is represented by R 1-x A x Fe m-y Co y , where R denotes at least one kind of element selected from rare earth elements including Y and A denotes Ca or Ca and elements including at least one kind selected from Sr or Ba: 0.2≤ x≤ 0.8 (1) 0.1≤ y≤ 0.65 (2) 3≤ m< 14 (3), and a content of B is from 0.1% to 0.6% by mass in terms of B 2 O 3 . 2 : The ferrite sintered magnet according to claim 1 , wherein a content of B is more than 0.2% by mass and 0.4% by mass or less in terms of B 2 O 3 . 3 : The ferrite sintered magnet according to claim 1 , wherein the following Equations (4) and (5) are satisfied: 0.2≤ x< 0.55 (4) 7.5< m< 14 (5). 4 : A motor comprising the ferrite sintered magnet according to claim 1 . 5 : A generator comprising the ferrite sintered magnet according to claim 1 . 6 : A ferrite particle comprising a ferrite phase having a magnetoplumbite-type crystal structure, wherein x, y, and m satisfy the following Equations (1), (2), and (3) when composition of the ferrite particle is represented by R 1-x A x Fe m-y Co y , where R denotes at least one kind of element selected from rare earth elements including Y and A denotes Ca or Ca and elements including at least one kind selected from Sr or Ba: 0.2≤ x≤ 0.8 (1) 0.1≤ y≤ 0.65 (2) 3 ≤m< 14 (3),and a content of B is from 0.1% to 0.6% by mass in terms of B 2 O 3 . 7 : The ferrite particle according to claim 6 , wherein a content of B is more than 0.2% by mass and 0.4% by mass or less in terms of B 2 O 3 . 8 : The ferrite particle according to claim 6 , wherein the following Equations (4) and (5) are satisfied: 0.2≤ x< 0.55 (4) 7.5< m< 14 (5). 9 : A bonded magnet comprising the ferrite particle according to claim 6 . 10 : A motor comprising the bonded magnet according to claim 9 . 11 : A generator comprising the bonded magnet according to claim 9 . 12 : The ferrite sintered magnet according to claim 2 , wherein the following Equations (4) and (5) are satisfied: 0.2≤ x< 0.55 (4) 7.5< m< 14 (5). 13 : A motor comprising the ferrite sintered magnet according to claim 2 . 14 : A generator comprising the ferrite sintered magnet according to claim 2 . 15 : The ferrite particle according to claim 7 , wherein the following Equations (4) and (5) are satisfied: 0.2≤ x< 0.55 (4) 7.5< m< 14 (5). 16 : A bonded magnet comprising the ferrite particle according to claim 7 . 17 : A motor comprising the bonded magnet according to claim 16 . 18 : A generator comprising the bonded magnet according to claim 16 .
Assignees
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Classifications
characterised by the magnetic material · CPC title
- H01F1/11Primary
in the form of particles {(for magnetic record carriers G11B5/70626)} · CPC title
of calcined, sintered clinker or ceramics · CPC title
Treatment time · CPC title
Burning or sintering processes (C04B33/32 takes precedence {; powder metallurgy B22F}) · CPC title
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- What does patent US2019318856A1 cover?
- Provided is a ferrite sintered magnet including a ferrite phase having a magnetoplumbite-type crystal structure. x, y, and m satisfy the following Equations (1), (2), and (3) when composition of the ferrite sintered magnet is represented by R 1-x A x Fe m-y Co y , where R denotes at least one kind of element selected from rare earth elements including Y and A denotes Ca or Ca and elements inclu…
- Who is the assignee on this patent?
- Tdk Corp
- What technology area does this patent fall under?
- Primary CPC classification H01F1/11. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Oct 17 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).