Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
FERRITE PARTICLES, RESIN COMPOSITION AND ELECTROMAGNETIC SHIELDING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2017/212997
Kind Code:
A1
Abstract:
One purpose of the present invention is to provide ferrite particles which are capable of achieving high magnetic permeability in a frequency band of from 1 MHz to 1 GHz. Another purpose of the present invention is to provide: a resin composition which contains the ferrite particles; and an electromagnetic shielding material which is formed from this resin composition. Ferrite particles according to the present invention are single crystals having an average particle diameter of 1-2,000 nm, and have the shapes of spherical particles. The ferrite particles are characterized by substantially containing no Zn and by containing 3-25% by weight of Mn and 43-65% by weight of Fe. The ferrite particles are also characterized in that the real part μ' of the complex magnetic permeability as measured using a molded body that is formed from the ferrite particles and a binder resin has the maximum value in a frequency band of from 100 MHz to 1 GHz.

Inventors:
KOJIMA, Takashi (Ltd. 217 Toyofuta, Kashiwa-sh, Chiba 57, 〒2778557, JP)
ISHII, Kazutaka (Ltd. 217 Toyofuta, Kashiwa-sh, Chiba 57, 〒2778557, JP)
SUGIURA, Takao (Ltd. 217 Toyofuta, Kashiwa-sh, Chiba 57, 〒2778557, JP)
IGARASHI, Tetsuya (Ltd. 217 Toyofuta, Kashiwa-sh, Chiba 57, 〒2778557, JP)
AGA, Koji (Ltd. 217 Toyofuta, Kashiwa-sh, Chiba 57, 〒2778557, JP)
Application Number:
JP2017/020229
Publication Date:
December 14, 2017
Filing Date:
May 31, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
POWDERTECH CO., LTD. (217 Toyofuta, Kashiwa-shi Chiba, 57, 〒2778557, JP)
International Classes:
H05K9/00; C01G49/00; C30B29/22; H01F1/34
Foreign References:
JP2002025816A2002-01-25
JP2015231928A2015-12-24
JPH02135711A1990-05-24
JPH0221603A1990-01-24
JP2003104790A2003-04-09
JPH1064716A1998-03-06
JPS61101458A1986-05-20
Attorney, Agent or Firm:
YOSHIMURA, Katsuhiro (Yoshimura International Patent Office, Omiya F Bldg. 5-4, Sakuragicho 2-chome, Omiya-ku, Saitama-sh, Saitama 54, 〒3300854, JP)
Download PDF: