Ferrite particles having outer shell structure used for filtering medium
US-2018008921-A1 · Jan 11, 2018 · US
Spherical ferrite powder, resin compound including spherical ferrite powder, and molded product made of resin compound
US10501333B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10501333-B2 |
| Application number | US-201515511492-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 31, 2015 |
| Priority date | Sep 19, 2014 |
| Publication date | Dec 10, 2019 |
| Grant date | Dec 10, 2019 |
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- Title
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Abstract
Official abstract text for this publication.
The present invention provides a spherical ferrite powder that is excellent in filling ability and moldability if used as a filler, is excellent in handling ability, and is high in resistivity; a resin compound including the ferrite powder; and a molded product made of the resin compound. The spherical ferrite powder including 15 to 30 wt % of ferrite particles having the particle diameter less than 11 μm and have the volume average particle diameter of 10 to 50 μm; the resin compound including the ferrite powder; and the molded product made of the resin compound are employed.
First claim
Opening claim text (preview).
The invention claimed is: 1. A spherical ferrite powder comprising a mixture of: spherical ferrite particles having a particle diameter of less than 11 μm; and spherical ferrite particles having a particle diameter of 11 μm or more; wherein: the spherical ferrite particles having a particle diameter of less than 11 μm have a BET specific surface area of 2 to 50 m 2 /g; the spherical ferrite particles having a particle diameter of 11 μm or more have a BET specific surface area of 0.1 to 2 m 2 /g; an amount of the spherical ferrite particles having a particle diameter of less than 11 μm present in the mixture is 15 to 30 wt % of a total weight of the mixture; and a volume average particle diameter of the mixture of spherical ferrite particles is 10 to 50 μm. 2. The spherical ferrite powder according to claim 1 , wherein the ferrite particles having the particle diameter of 11 μm or more are coated with a resin. 3. A resin compound including 50 to 99.5 wt % of the spherical ferrite powder according to claim 2 . 4. A molded product formed by molding the resin compound according to claim 3 . 5. A resin compound including 50 to 99.5 wt % of the spherical ferrite powder according to claim 1 . 6. A molded product formed by molding the resin compound according to claim 5 .
Assignees
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Classifications
Magnetic properties · CPC title
Micrometer sized, i.e. from 1-100 micrometer · CPC title
Oxides of iron · CPC title
Particles with a specific particle size distribution · CPC title
of metals · CPC title
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- What does patent US10501333B2 cover?
- The present invention provides a spherical ferrite powder that is excellent in filling ability and moldability if used as a filler, is excellent in handling ability, and is high in resistivity; a resin compound including the ferrite powder; and a molded product made of the resin compound. The spherical ferrite powder including 15 to 30 wt % of ferrite particles having the particle diameter less…
- Who is the assignee on this patent?
- Powdertech Co Ltd, Tatsuta Electric Wire & Cable Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C01G49/0072. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 10 2019 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).