FR2432029A1 - MATERIAL WITH ALVEOLAR STRUCTURE ABSORBING ELECTROMAGNETIC WAVES - Google Patents

MATERIAL WITH ALVEOLAR STRUCTURE ABSORBING ELECTROMAGNETIC WAVES

Info

Publication number
FR2432029A1
FR2432029A1 FR7209836A FR7209836A FR2432029A1 FR 2432029 A1 FR2432029 A1 FR 2432029A1 FR 7209836 A FR7209836 A FR 7209836A FR 7209836 A FR7209836 A FR 7209836A FR 2432029 A1 FR2432029 A1 FR 2432029A1
Authority
FR
France
Prior art keywords
electromagnetic waves
absorbing electromagnetic
alveolar structure
magnetite
structure absorbing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR7209836A
Other languages
French (fr)
Inventor
Jean-Edgar Picquendar
Jean-Paul Cau
Jean-Claude Dubois
Jean-Claude Lavenu
Jean Nicolas
Yonda Roland Sroussi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales SA
Original Assignee
Thomson CSF SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomson CSF SA filed Critical Thomson CSF SA
Priority to FR7209836A priority Critical patent/FR2432029A1/en
Priority to GB5416/73A priority patent/GB1597701A/en
Publication of FR2432029A1 publication Critical patent/FR2432029A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0066—Use of inorganic compounding ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/20—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder
    • H01F1/28—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder dispersed or suspended in a bonding agent
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes

Abstract

L'invention se rapporte aux produits << mousse >> constitués de plastique à faible densité chargé de poudre ayant des propriétés absorbantes. On désire un matériau très efficace en hyperfréquence, facile à mettre en oeuvre. La matière plastique choisie est le polyuréthane et l'absorbant est de la magnétite. Le taux en poids de magnétite est de 40 à 60 %. A ce dernier taux, le matériau est très efficace tout en ayant de bonnes propriétés mécaniques. L'invention s'applique aux dispositifs de transmission hyperfréquence ainsi qu'à la protection contre le rayonnement électromagnétique.The invention relates to "foam" products made of low density, powder-filled plastic having absorbent properties. We want a very efficient microwave material that is easy to process. The plastic material chosen is polyurethane and the absorbent is magnetite. The rate by weight of magnetite is 40 to 60%. At the latter rate, the material is very efficient while having good mechanical properties. The invention applies to microwave transmission devices as well as to protection against electromagnetic radiation.

FR7209836A 1972-03-21 1972-03-21 MATERIAL WITH ALVEOLAR STRUCTURE ABSORBING ELECTROMAGNETIC WAVES Withdrawn FR2432029A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7209836A FR2432029A1 (en) 1972-03-21 1972-03-21 MATERIAL WITH ALVEOLAR STRUCTURE ABSORBING ELECTROMAGNETIC WAVES
GB5416/73A GB1597701A (en) 1972-03-21 1973-02-02 Material with a honeycomb construction which absorbs electromagnetic waves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7209836A FR2432029A1 (en) 1972-03-21 1972-03-21 MATERIAL WITH ALVEOLAR STRUCTURE ABSORBING ELECTROMAGNETIC WAVES

Publications (1)

Publication Number Publication Date
FR2432029A1 true FR2432029A1 (en) 1980-02-22

Family

ID=9095569

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7209836A Withdrawn FR2432029A1 (en) 1972-03-21 1972-03-21 MATERIAL WITH ALVEOLAR STRUCTURE ABSORBING ELECTROMAGNETIC WAVES

Country Status (2)

Country Link
FR (1) FR2432029A1 (en)
GB (1) GB1597701A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE457031B (en) * 1987-03-24 1988-11-21 Asea Ab ELECTRIC conductor is provided with a surrounding insulation comprising a layer of an organic polymer and the use of the conductor in a harrow.
EP0301195A3 (en) * 1987-07-25 1989-11-29 Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung Layered product
CN102977587A (en) * 2012-12-25 2013-03-20 中国人民解放军总参谋部工程兵科研三所 Foaming type polyurethane wave-absorbing material and preparation method thereof

Also Published As

Publication number Publication date
GB1597701A (en) 1981-09-09

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Legal Events

Date Code Title Description
ST Notification of lapse