DE10000523A1 - Ferrite compound material with high electromagnetic absorption in the frequency range from 20-40 gigahertz for applying to cabling is produced in spinel or other crystal forms for example as hexagonal or garnet - Google Patents

Ferrite compound material with high electromagnetic absorption in the frequency range from 20-40 gigahertz for applying to cabling is produced in spinel or other crystal forms for example as hexagonal or garnet

Info

Publication number
DE10000523A1
DE10000523A1 DE2000100523 DE10000523A DE10000523A1 DE 10000523 A1 DE10000523 A1 DE 10000523A1 DE 2000100523 DE2000100523 DE 2000100523 DE 10000523 A DE10000523 A DE 10000523A DE 10000523 A1 DE10000523 A1 DE 10000523A1
Authority
DE
Germany
Prior art keywords
ferrite
compound material
spinel
produced
crystal forms
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Withdrawn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
DE2000100523
Other languages
German (de)
Inventor
Frank Graebner
Christian Knedlik
Gerd Teichert
Stefan Hildenbrandt
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.)
BRUNEL IMG GMBH, 99734 NORDHAUSEN, DE
Original Assignee
INST MASCHINEN ANTRIEBE und EL
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 INST MASCHINEN ANTRIEBE und EL filed Critical INST MASCHINEN ANTRIEBE und EL
Priority to DE2000100523 priority Critical patent/DE10000523A1/en
Publication of DE10000523A1 publication Critical patent/DE10000523A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • H05K9/0084—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a single continuous metallic layer on an electrically insulating supporting structure, e.g. metal foil, film, plating coating, electro-deposition, vapour-deposition
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2658—Other ferrites containing manganese or zinc, e.g. Mn-Zn ferrites
    • 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
    • H01F1/34—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 non-metallic substances, e.g. ferrites
    • H01F1/342—Oxides
    • H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H01Q17/001—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems for modifying the directional characteristic of an aerial
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H01Q17/007—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems with means for controlling the absorption

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Dispersion Chemistry (AREA)
  • Power Engineering (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Aerials With Secondary Devices (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

Ferrite material is produced in spinel or other crystal forms, e.g., hexagonal or garnet. Having crystal lattice can influence absorption level, as can size of grain, metering, texture, thickness of layers, and anisotropy. Surface resistance is 370-390 Ohm . Material comprises miravithene with ferrite mass proportion mixture such as MnZn ferrite mixed with the ferrite being Zn0.23Mn0.69Fe2.08O4.0.

Description

In den bisher bekannten Lösungen werden hohe elektromagnetische Absorptionen durch mehrlagige Absorber erzeugt, wobei die Mehrlagigkeit eine technologisch aufwendige Herstellung sowie Verarbeitung zur Folge hat. Hinzu kommt, daß die entstehenden Absorber einen zu geringen Absorptionsgrad aufweisen. Im Patent US 005,588 3318 A ist ein derartiger mehrlagiger Absorber beschrieben mit den geschilderten Nachteilen.In the previously known solutions, high electromagnetic Absorptions generated by multi-layer absorbers, the multi-layer one technologically complex production and processing results. in addition comes that the resulting absorbers have too low an absorption level exhibit. Such a multilayer absorber is in US Pat. No. 005,588 3318 A described with the disadvantages described.

Der in den Schutzansprüchen angegebenen Erfindung liegt das Problem zugrunde, ein vielseitig anwendbares, einlagiges Absorbermaterial zu schaffen, dessen tanδ-Verlust höher als bei mehrlagigen Absorbern ist.The problem specified in the protection claims is the invention to create a versatile, single-layer absorber material, whose tan δ loss is higher than that of multi-layer absorbers.

Dieses Problem wird durch das in Schutzanspruch 1 aufgeführte Material gelöst.This problem is caused by the material listed in claim 1 solved.

Das Ferritmaterial wird in Spinell- bzw. anderen Kristallformen (z. B. hexagonal, granat, . . .) hergestellt. Der Absorptionsgrad ist durch die Gitterbesetzung, die Korngröße, die Dotierung, die Textur, die Schichtdicke und durch die Anisotropie beeinflußbar. Der Flächenwiderstand beträgt 370-390 Ω. Das vorliegende Material besteht aus Miravithen mit Massenanteil eines Ferrit- Gemisches, z. B. ein MnZn-Ferrit-Gemisch mit dem Ferrit Zn0.23Mn0.69Fe2.08O4.0, wobei auch andere Ferrit-Gemische eingesetzt werden können.The ferrite material is produced in spinel or other crystal forms (e.g. hexagonal, garnet,...). The degree of absorption can be influenced by the grating, the grain size, the doping, the texture, the layer thickness and by the anisotropy. The surface resistance is 370-390 Ω. The present material consists of miravites with a mass fraction of a ferrite mixture, e.g. B. a MnZn-ferrite mixture with the ferrite Zn 0.23 Mn 0.69 Fe 2.08 O 4.0 , whereby other ferrite mixtures can also be used.

Durch diese Zusammensetzung werden die Zielparameter und damit ein hoher tanδ-Verlust erreicht.This composition makes the target parameters and thus a high one tan δ loss reached.

Entsprechend Patentanspruch 2 kann das Material als Beschichtung oder als Beimengung eingesetzt werden. Anwendbar ist das Material z. B. zur Erhöhung der Reflexionsdämpfung im Inneren von Gehäusen und zur Abschirmung von Kabeln.According to claim 2, the material as a coating or as Admixture can be used. The material is applicable e.g. B. to increase  the reflection attenuation inside the housing and to shield Cable.

Claims (2)

1. Ferrit-Compound-Material mit hoher elektromagnetischer Absorption im Frequenzbereich von 20 MHz bis 40 GHz, dadurch gekennzeichnet, daß es durch einen hohen Absorptionsgrad bzw. tanδ-Verlust eine hohe Reflexionsdämpfung aufweist, sich bei elektromagnetischer Bestrahlung erwärmt, technologisch aufwandsarm einlagig in Schicht- und Beschichtungsform oder als Beimengungsmaterial in Spinell- oder anderen Kristallformen herstellbar ist, einen Flächenwiderstand von 370-390 Ohm aufweist, das Compoundmaterial Miravithen mit 85%-90% Massenanteil eines Ferrit-Gemisches versehen wird, so z. B. mit dem MnZn-Ferrit- Gemisch mit den Anteilen 10%-15% ZnO, 33%-38% MnO, 52%-56% Fe2O3 als Zn0.23Mn0.69Fe2.08O4.0, wobei auch andere Ferrit-Gemische eingesetzt werden können.1. Ferrite compound material with high electromagnetic absorption in the frequency range from 20 MHz to 40 GHz, characterized in that it has a high level of reflection attenuation due to a high degree of absorption or tan δ loss, heats up with electromagnetic radiation, and is technologically inexpensive in one layer - And coating form or as an admixture material in spinel or other crystal forms can be produced, has a sheet resistance of 370-390 ohms, the compound material Miravithen is provided with 85% -90% mass fraction of a ferrite mixture, for. B. with the MnZn-ferrite mixture with the proportions 10% -15% ZnO, 33% -38% MnO, 52% -56% Fe 2 O 3 as Zn 0.23 Mn 0.69 Fe 2.08 O 4.0 , with other ferrite Mixtures can be used. 2. Ferrit-Compound-Material nach Patentanspruch 1, dadurch gekennzeichnet, daß es zwecks Erhöhung der Reflexionsdämpfung elektromagnetischer Strahlung zur Beschichtung von Teilen, insbesondere von Gehäusen, und als Beimengungsmaterial, insbesondere bei Kunststoffen, nachwachsenden Rohstoffen und Kabelisolierungen, vielseitig und kostengünstig eingesetzt werden kann.2. ferrite compound material according to claim 1, characterized, that it is electromagnetic to increase reflection loss Radiation for coating parts, in particular housings, and as an admixture material, especially for plastics, renewable Raw materials and cable insulation, versatile and inexpensive to use can be.
DE2000100523 2000-01-08 2000-01-08 Ferrite compound material with high electromagnetic absorption in the frequency range from 20-40 gigahertz for applying to cabling is produced in spinel or other crystal forms for example as hexagonal or garnet Withdrawn DE10000523A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2000100523 DE10000523A1 (en) 2000-01-08 2000-01-08 Ferrite compound material with high electromagnetic absorption in the frequency range from 20-40 gigahertz for applying to cabling is produced in spinel or other crystal forms for example as hexagonal or garnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2000100523 DE10000523A1 (en) 2000-01-08 2000-01-08 Ferrite compound material with high electromagnetic absorption in the frequency range from 20-40 gigahertz for applying to cabling is produced in spinel or other crystal forms for example as hexagonal or garnet

Publications (1)

Publication Number Publication Date
DE10000523A1 true DE10000523A1 (en) 2001-07-26

Family

ID=7626984

Family Applications (1)

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DE2000100523 Withdrawn DE10000523A1 (en) 2000-01-08 2000-01-08 Ferrite compound material with high electromagnetic absorption in the frequency range from 20-40 gigahertz for applying to cabling is produced in spinel or other crystal forms for example as hexagonal or garnet

Country Status (1)

Country Link
DE (1) DE10000523A1 (en)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4474676A (en) * 1983-02-28 1984-10-02 Tdk Corporation Electromagnetic interference shielding material
US5198138A (en) * 1989-04-19 1993-03-30 Toda Kogyo Corp. Spherical ferrite particles and ferrite resin composite for bonded magnetic core
EP0542200A1 (en) * 1991-11-11 1993-05-19 SIEMENS MATSUSHITA COMPONENTS GmbH & CO. KG Magnetic material for bobbin cores and manufacturing process
EP0558178A2 (en) * 1992-02-28 1993-09-01 Kureha Kagaku Kogyo Kabushiki Kaisha Magnetically permeable composition and soft magnetic component
EP0764955A1 (en) * 1995-09-19 1997-03-26 Thomson-Csf Composite magnetic material with reduced permeability and losses
EP0785557A1 (en) * 1995-07-20 1997-07-23 Tokin Corporation Composite magnetic material and product for eliminating electromagnetic interference
EP0884739A1 (en) * 1996-09-30 1998-12-16 Tokin Corporation Compound magnetic material and electromagnetic interference suppressor
EP0886475A1 (en) * 1996-02-23 1998-12-30 Unilever Plc Frozen food product
EP0921534A1 (en) * 1996-08-21 1999-06-09 TDK Corporation Magnetic powder and magnetic molded article
EP0986074A2 (en) * 1998-09-07 2000-03-15 Kureha Kagaku Kogyo Kabushiki Kaisha Resinous magnetic composition and manufacturing process

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4474676A (en) * 1983-02-28 1984-10-02 Tdk Corporation Electromagnetic interference shielding material
US5198138A (en) * 1989-04-19 1993-03-30 Toda Kogyo Corp. Spherical ferrite particles and ferrite resin composite for bonded magnetic core
EP0542200A1 (en) * 1991-11-11 1993-05-19 SIEMENS MATSUSHITA COMPONENTS GmbH & CO. KG Magnetic material for bobbin cores and manufacturing process
EP0558178A2 (en) * 1992-02-28 1993-09-01 Kureha Kagaku Kogyo Kabushiki Kaisha Magnetically permeable composition and soft magnetic component
EP0785557A1 (en) * 1995-07-20 1997-07-23 Tokin Corporation Composite magnetic material and product for eliminating electromagnetic interference
EP0764955A1 (en) * 1995-09-19 1997-03-26 Thomson-Csf Composite magnetic material with reduced permeability and losses
EP0886475A1 (en) * 1996-02-23 1998-12-30 Unilever Plc Frozen food product
EP0921534A1 (en) * 1996-08-21 1999-06-09 TDK Corporation Magnetic powder and magnetic molded article
EP0884739A1 (en) * 1996-09-30 1998-12-16 Tokin Corporation Compound magnetic material and electromagnetic interference suppressor
EP0986074A2 (en) * 1998-09-07 2000-03-15 Kureha Kagaku Kogyo Kabushiki Kaisha Resinous magnetic composition and manufacturing process

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Elias: Macromoleküle 4/1981, S. 411-420 *

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Legal Events

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OP8 Request for examination as to paragraph 44 patent law
8122 Nonbinding interest in granting licenses declared
8130 Withdrawal
8127 New person/name/address of the applicant

Owner name: BRUNEL IMG GMBH, 99734 NORDHAUSEN, DE