ELECTROMAGNETIC WAVE ABSORBING COMPOSITION AND ELECTROMAGNETIC WAVE ABSORBING BODY

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

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Other References: