EP1937033A1 - Matériau semi-conducteur composite à l'état solide pour générer un rayonnement électro-magnétique et utilisation dudit matériau dans un dispositif de chauffage à infrarouge - Google Patents

Matériau semi-conducteur composite à l'état solide pour générer un rayonnement électro-magnétique et utilisation dudit matériau dans un dispositif de chauffage à infrarouge Download PDF

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Publication number
EP1937033A1
EP1937033A1 EP06077224A EP06077224A EP1937033A1 EP 1937033 A1 EP1937033 A1 EP 1937033A1 EP 06077224 A EP06077224 A EP 06077224A EP 06077224 A EP06077224 A EP 06077224A EP 1937033 A1 EP1937033 A1 EP 1937033A1
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EP
European Patent Office
Prior art keywords
radiation
fact
composite material
component
weight parts
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Application number
EP06077224A
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German (de)
English (en)
Inventor
Adrianus Gerardus De Ruiter
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Individual
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Individual
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Publication date
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Priority to EP06077224A priority Critical patent/EP1937033A1/fr
Publication of EP1937033A1 publication Critical patent/EP1937033A1/fr
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor

Definitions

  • the present invention relates to a composite material in which electro-magnetic radiation is generated by applying an electric field across said material and whereby said material contains at least an electrically conductive component, as well as a component that generates radiation under the influence of an electric field applied to it, and a component acting as a lens on the generated radiation.
  • the said composite material is thereby characterised by the fact that trivalent ytterbium or a compound of trivalent ytterbium is another component that is present in the composite material and acts as an amplifier for the radiation that is generated in the material.
  • the electro-magnetic spectrum for non- (or very limited) ionising radiation is divided into several wavelength 'windows', for instance radio, optical and infrared.
  • wavelength 'windows' for instance radio, optical and infrared.
  • the basic devices that are required for efficient application are radiation sources and detectors. Every device utilising radiation from said wavelength windows is based on either a radiation source or a radiation detector or both. So it is obvious that a major part of the research efforts in this field is devoted to designing and producing reliable and (energy)efficient sources and detectors, and miniaturising such devices so that they can be integrated in microelectronic circuits.
  • For most of the wavelength windows much progression in science and technology has been made in the recent years.
  • the infrared window however the scientifical and technological developments have not been as extensive as for the other windows.
  • infrared radiation for instance in telecommunications, medicine and materials science
  • infrared wavelength range 6000-10,000 nm.
  • the main drawback for the infrared wavelength window is that there presently is no semiconductive material that can be used in, for instance, solid state infrared radiation source devices, that offers the possibility to be 'tuned' to a specific narrow wavelength range and to have a predetermined radiation intensity, by varying only the weight percentage of a limited number of components in the material.
  • solid state infrared radiation source devices that offers the possibility to be 'tuned' to a specific narrow wavelength range and to have a predetermined radiation intensity, by varying only the weight percentage of a limited number of components in the material.
  • the component that acts as a lens on the generated electro-magnetic radiation enables to tune the output wavelength to a specific wavelength range.
  • the output radiation is emitted in the form of photons.
  • silicates were used as amplifying component.
  • the trivalent Ytterbium that is used according to the present invention enables a larger amplification of the output radiation and increases the photon production.
  • the intensity of said radiation that is generated in the material can be varied by varying the amount of trivalent ytterbium between 5 and 38 weight parts for every 100 weight parts of said component acting as a lens.
  • the said composite material according to the present invention may be advantageously characterised by the fact that the wavelength of said radiation that is generated in the material, can be varied between 250 and 10.000 nanometres if the said radiation generating component of the composite material contains at least the following active compounds: CU 2 O 3 , Si 2 O 3 , Al 2 O 3 , CuSO 4 , Li 2 O and Cr 2 O 3 and whereby the amounts of Cu 2 O 3 and Si 2 O 3 are respectively 10 and 30 weight parts for every 100 weight parts of said component acting as a lens.
  • the specified wavelength range in this case covers the infrared part of the electro-magnetic spectrum.
  • the wavelength and intensity of the output radiation can now be further tuned by varying the weight percentages of the amplifying and lens components.
  • said component acting as a lens consists of a carborundum, silicon or zirconium compound or a mixture of said compounds, whereby, in a mixture the zirconium amounts to 50 to 70 weight parts per 100 weight parts of the total amount of the component acting as a lens.
  • the composite material according to the present invention may further be advantageously characterised by the fact that said zirconium compounds are present in the material in the form of grains with a diameter between 200 and 250 micrometres. Experiments have shown that this diameter range provides the best results for the lens function.
  • the composite material according to the present invention contains a lens amplifying component which at least contains one or more compounds of trivalent neodymium, erbium or holmium.
  • This lens amplifying component further amplifies the radiation that has been 'selected' by the lens component and improves the photon emission.
  • the composite material according to the present invention may be advantageously characterised by the fact that the amount of the said trivalent neodymium, erbium or holmium in the lens amplifying component is between 5 and 15 weight parts per 100 weight parts of the said component acting as a lens.
  • the device for heating by means of infra red radiation according to the present invention can be advantageously characterised by the fact that said layered structure consists of a succession of one or more layers containing a precious metal and one or more layers containing a metal oxide, in addition to the said one or more layers of the composite material according to the invention.
  • the layers containing a precious metal are functioning as a reflector for the infrared radiation photons generated by the layer of composite material according to the present invention.
  • the metal oxide layers are mainly meant to provide a good basis for depositing the precious metal layer(s) on a carrier material like glass and to shield the precious metal layer(s) from radiation and temperature conditions. The reflected photons are reflected back into the composite material and increase the overall energy efficiency of the device.
  • the device for heating by means of infra red radiation according to the invention may further be characterised by the fact that said precious metal is gold, copper, rhodium or palladium.
  • the device for heating by means of infra red radiation according to the invention may additionally be characterised by the fact that said metal oxide is indium oxide or tin oxide.
  • the said layered structure contains a carrier layer that is transparent for the electro-magnetic radiation which is generated by said radiation generating component in said composite material according to the invention.
  • the device for heating by means of infra red radiation according to the present invention may furthermore be characterised by the fact that said carrier layer contains an oxide or an alkoxide of an element from group IV-B of the Periodical System of Elements, whereby the concentration of said oxide or alkoxide is between 18 and 45 weight parts per 100 weight parts of the carrier material.
  • the device for heating by means of infra red radiation is characterised by the fact that said carrier material consists of KaBaSi-glass or LiMgAIS-glass. These kinds of glass are best suited for applications in the infrared wavelength window, because they contain the least impurities that prohibit the transmittance of infrared radiation photons emitted by the said layer of composite material.
  • the device for heating by means of infra red radiation according to the present invention is characterised by the fact that the device is attached to a wall or ceiling and forms part of an infra red central heating system.
  • a preferred embodiment of a device for heating by means of infrared radiation comprising the composite material according to the present invention will be described.
  • the following description and the attached drawing will show to the reader in more detail how the invention remedies the aforementioned disadvantages associated with the prior art.
  • description and drawings are merely meant to illustrate application of the invention and should in no way be regarded as limiting the scope of the present invention.
  • Figure 1 is a schematical view of a specific embodiment of the device for heating by means of infrared radiation, whereby the device is attached to a wall and forms part of an infra red central heating system.
  • Devices for heating by means of infrared radiation are known from prior art.
  • Devices that use a solid state semiconductive material for generating infrared radiation in the far infrared wavelength (around 10,000 nm.) range, that have an energy efficiency that is close to unity and can have a surface temperature that is acceptable for use in a domestic environment are however not commonly known.
  • the composite material and the device according to the present invention it is possible to provide an infrared heating device with such characteristics that can easily be used as part of a domestic infrared central heating system.
  • the device shown in figure 1 consists of a plate (1) of KaBaSi-glass or LiMgAlS-glass that serves as a carrier material for a layer of composite material according to the present invention.
  • Said layer of composite material may for instance have been deposited on the glass carrier material by industrial silk-screen printing.
  • a layer of precious metal present, for instance a very thin layer of gold, for reflecting photons that are emitted towards the back-side of the device in the direction of the wall. Normally these photons would only increase the temperature in the interior of the device and constitute an energy loss. Now they are reflected back into the layer of composite material where they can again play a role in the photon generation process.
  • the back-side of the layer of precious metal is for instance covered by a layer of indium oxide.
  • the glass carrier material with the layered structure thereon is provided with integrated electrodes which enable to apply an electric field to the said composite layer.
  • the glass plate is mounted in a frame (2) of, for instance, aluminum and attached to a wall (3) of, for instance a living room in an appartment.
  • the device may be part of a complete central heating system consisting of one or more similar devices in every room of the appartment and appropriate control systems and thermostates to control the room temperatures.
  • the said layer of composite material according to the present invention generates infrared radiation, for instance with a wavelength around 10,000 nm., in the form of photons.
  • the said zirkonium compounds in the composite material scatters the photons (4) over an angle of about 170 degrees.
  • every photon that impacts on, for instance, a piece of furniture in the room, the walls or the skin of person that is present serves as a micro source of heat. So the room is heated very evenly and gradually, with very little convection, because air is not required as a medium, as is the case with traditional central heating.
  • the layer of composite material according to the present invention and the application of said material in a device for infrared heating according to the present invention make it possible to achieve an energy efficiency that is close to unity (100%).
  • the said composite material and the device can be manufactured with commonly available materials and commonly known manufacturing methods.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Glass Compositions (AREA)
EP06077224A 2006-12-21 2006-12-21 Matériau semi-conducteur composite à l'état solide pour générer un rayonnement électro-magnétique et utilisation dudit matériau dans un dispositif de chauffage à infrarouge Withdrawn EP1937033A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06077224A EP1937033A1 (fr) 2006-12-21 2006-12-21 Matériau semi-conducteur composite à l'état solide pour générer un rayonnement électro-magnétique et utilisation dudit matériau dans un dispositif de chauffage à infrarouge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06077224A EP1937033A1 (fr) 2006-12-21 2006-12-21 Matériau semi-conducteur composite à l'état solide pour générer un rayonnement électro-magnétique et utilisation dudit matériau dans un dispositif de chauffage à infrarouge

Publications (1)

Publication Number Publication Date
EP1937033A1 true EP1937033A1 (fr) 2008-06-25

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EP06077224A Withdrawn EP1937033A1 (fr) 2006-12-21 2006-12-21 Matériau semi-conducteur composite à l'état solide pour générer un rayonnement électro-magnétique et utilisation dudit matériau dans un dispositif de chauffage à infrarouge

Country Status (1)

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EP (1) EP1937033A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0741501A1 (fr) * 1994-11-18 1996-11-06 Zinaida Petrovna Voronkova Dispositif de chauffage electrique et son procede de production
WO1999042141A1 (fr) * 1998-02-20 1999-08-26 Rustam Rakhimov Procede de sterilisation de substances et d'articles et leur dispositif de mise en oeuvre
EP1117273A2 (fr) * 2000-01-13 2001-07-18 Sumitomo Electric Industries, Ltd. Elément chauffant en céramique
DE10345109A1 (de) * 2003-09-26 2005-05-04 Ibt Infrabio Tech Gmbh Vorrichtung zur thermischen Behandlung von Lebensmittelgut und anderen Gütern

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0741501A1 (fr) * 1994-11-18 1996-11-06 Zinaida Petrovna Voronkova Dispositif de chauffage electrique et son procede de production
WO1999042141A1 (fr) * 1998-02-20 1999-08-26 Rustam Rakhimov Procede de sterilisation de substances et d'articles et leur dispositif de mise en oeuvre
EP1117273A2 (fr) * 2000-01-13 2001-07-18 Sumitomo Electric Industries, Ltd. Elément chauffant en céramique
DE10345109A1 (de) * 2003-09-26 2005-05-04 Ibt Infrabio Tech Gmbh Vorrichtung zur thermischen Behandlung von Lebensmittelgut und anderen Gütern

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