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Title:
ELECTROMAGNETIC WAVE ABSORBING COMPOSITION AND ELECTROMAGNETIC WAVE ABSORBING BODY
Document Type and Number:
WIPO Patent Application WO/2019/065252
Kind Code:
A1
Abstract:
The present invention achieves an electromagnetic wave absorbing composition and an electromagnetic wave absorbing body which can excellently absorb a plurality of types of electromagnetic waves of different frequencies in a frequency band higher than the millimeter wave band. This electromagnetic wave absorbing composition contains a magnetic iron oxide 1a which magnetically resonates at high frequencies equal to or higher than frequencies in the millimeter wave band and a resin binder 1b, and has at least two separate extrema on a differential curve obtained by differentiating a hysteresis loop of magnetic characteristic in an applied magnetic field between -16 kOe to 16 kOe. In addition, the electromagnetic wave absorbing body is provided with an electromagnetic wave absorbing layer formed by the electromagnetic wave absorbing composition.

Inventors:
FUJITA MASAO
HIROI TOSHIO
Application Number:
PCT/JP2018/033864
Publication Date:
April 04, 2019
Filing Date:
September 12, 2018
Export Citation:
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Assignee:
MAXELL HOLDINGS LTD (JP)
International Classes:
H05K9/00; C01G49/00; C01G49/06; H01F1/34
Foreign References:
JP2008277726A2008-11-13
JPS5131890A1976-03-18
JP2017045743A2017-03-02
JPH09259427A1997-10-03
JP2010135701A2010-06-17
JPH10150291A1998-06-02
JPH11354972A1999-12-24
JP2000151179A2000-05-30
JP2003124016A2003-04-25
JP2015015373A2015-01-22
JP2002280208A2002-09-27
JP2011233834A2011-11-17
JP2006080352A2006-03-23
JP2015198163A2015-11-09
JP2008060484A2008-03-13
JP2015232984A2015-12-24
Attorney, Agent or Firm:
IKEUCHI & PARTNERS (JP)
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