Ferromagnetic nano metal powder

Patent metadata

Field	Value
Publication number	US-9378875-B2
Application number	US-201414228243-A
Country	US
Kind code	B2
Filing date	Mar 27, 2014
Priority date	Oct 30, 2013
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

The present invention related to ferromagnetic nano-metal powders and more particularly, to ferromagnetic nano-metal powders for increasing packing density by decreasing the porosity between micro-sized soft magnetic metal powders. According to an embodiment of the present invention, the ferromagnetic nano-metal powder allows high packing density and high magnetic property at a high frequency to fill the pores inevitably generated during the manufacturing process of an inductor using the soft magnetic metal powders.

First claim

What is claimed is:

1. An inductor component, comprising:
a core part including ferromagnetic nano-metal powders and soft magnetic metal powders,
wherein the ferromagnetic nano-metal powders have ferromagnetic core particles and an insulating layer coated on a surface of the ferromagnetic core particles,
wherein the soft magnetic metal powders have a larger diameter than that of the ferromagnetic nano-metal powders, and
wherein the ferromagnetic nano-metal powders fill regions between adjacent soft magnetic metal powders.

2. The inductor component of claim 1 , wherein the ferromagnetic core particles are selected from the group consisting of Fe, Co, Ni, and an alloy thereof.

3. The inductor component of claim 1 , wherein the insulating layer has a diameter of 250-500 nm.

4. The inductor component of claim 1 , wherein the soft magnetic metal powders have a diameter of 10-50 μm.

5. The inductor component of claim 1 , wherein the core part has a porosity less than or the same as 5%.

6. The inductor component of claim 1 , wherein a diameter of a region between the adjacent soft magnetic metal powders is 300 nm-1 μm.

7. The inductor component of claim 1 , wherein the soft magnetic metal powders have a Qmax factor of 1 MHz or less.

8. The inductor component of claim 1 , wherein the ferromagnetic nano-metal powders have a Q factor of 90 or higher at a frequency of 10 MHz or higher.

9. The inductor component of claim 1 , wherein the ferromagnetic nano-metal powders have a Qmax factor of 23 MHz or higher.

10. The inductor component of claim 1 , wherein the insulating layer is a coating with one selected from the group consisting of aluminum oxide, silicon oxide, titanium oxide, zinc oxide and phosphate.

Assignees

• Samsung Electro Mech

Inventors

• Kim Jae Yeong
• An Sung-Yong
• Kim Hak-Kwan
• Seo Jung-Wook

Classifications

• H01F1/0054 Primary

  Coated nanoparticles, e.g. nanoparticles coated with organic surfactant · CPC title

• B22F1/16

  Metallic particles coated with a non-metal (coated with lubricating or binding agents or with organic material B22F1/10) · CPC title

• H01F1/06

  in the form of particles, e.g. powder (H01F1/047 takes precedence {; record carriers G11B5/70605}) · CPC title

• H01F1/33 Primary

  mixtures of metallic and non-metallic particles; metallic particles having oxide skin · CPC title