EP 3433322 A1 20190130 - NEW ELECTROMAGNETIC-WAVE-ABSORBING MATERIALS FOR VARIOUS APPLICATIONS
Title (en)
NEW ELECTROMAGNETIC-WAVE-ABSORBING MATERIALS FOR VARIOUS APPLICATIONS
Title (de)
NEUE MATERIALIEN ZUR ABSORPTION VON ELEKTROMAGNETISCHEN WELLEN FÜR VERSCHIEDENE ANWENDUNGEN
Title (fr)
NOUVEAUX MATERIAUX ABSORBANT LES ONDES ELECTROMAGNETIQUES POUR APPLICATIONS DIVERSES
Publication
Application
Priority
- FR 1652428 A 20160321
- FR 2017050645 W 20170320
Abstract (en)
[origin: WO2017162973A1] One subject of the present invention is an electromagnetic-wave-absorbing composite material comprising a carrier matrix (11) and an electromagnetic-wave-absorbing filler (12). According to the invention, the carrier matrix (11) is a cork matrix, which is formed of particles the equivalent diameter Del of which is comprised between 10 µm and 5 mm, and the composite material (1) has a real permittivity higher than 1.2 and a dielectric loss tangent tan δ higher than 0.1. Another subject of the present invention is a method for producing such a material, and the use of this material as an absorber, in particular in an anechoic chamber, or as a radar absorber in stealth devices, or even to improve the electromagnetic compatibility of electronic devices.
IPC 8 full level
C08L 97/00 (2006.01); H01Q 17/00 (2006.01)
CPC (source: EP US)
C08L 97/007 (2013.01 - EP US); H01Q 17/00 (2013.01 - EP US); H01Q 17/004 (2013.01 - US); H01Q 17/008 (2013.01 - US)
Citation (search report)
See references of WO 2017162973A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
FR 3048974 A1 20170922; FR 3048974 B1 20190712; CN 109153855 A 20190104; EP 3433322 A1 20190130; JP 2019519905 A 20190711; JP 6913104 B2 20210804; US 11081802 B2 20210803; US 2019103679 A1 20190404; WO 2017162973 A1 20170928
DOCDB simple family (application)
FR 1652428 A 20160321; CN 201780029076 A 20170320; EP 17716569 A 20170320; FR 2017050645 W 20170320; JP 2018549466 A 20170320; US 201716087565 A 20170320