EP1769526B1 - Lampe a incandescence a element lumineux contenant du carbure - Google Patents

Lampe a incandescence a element lumineux contenant du carbure Download PDF

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Publication number
EP1769526B1
EP1769526B1 EP05763639A EP05763639A EP1769526B1 EP 1769526 B1 EP1769526 B1 EP 1769526B1 EP 05763639 A EP05763639 A EP 05763639A EP 05763639 A EP05763639 A EP 05763639A EP 1769526 B1 EP1769526 B1 EP 1769526B1
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EP
European Patent Office
Prior art keywords
coating
incandescent lamp
lamp according
power supply
tantalum
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EP05763639A
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German (de)
English (en)
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EP1769526A1 (fr
Inventor
Axel Bunk
Georg Rosenbauer
Matthias Damm
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Osram GmbH
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Osram GmbH
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • H01K1/04—Incandescent bodies characterised by the material thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/40—Leading-in conductors

Definitions

  • the invention relates to an incandescent lamp with carbide-containing luminous element according to the preamble of claim 1. It is in particular to halogen incandescent lamps having a luminous body of TaC, or contains the luminous body TaC as a component or coating.
  • Tantalum carbide has a melting point about 500 K higher than tungsten.
  • the temperature of a luminous body of tantalum carbide can be set considerably higher than that of a filament of tungsten.
  • tantalum carbide lamps lamps with tantalum carbide as luminous element
  • Marketing of tantalum carbide lamps has been hindered mainly by the brittleness of tantalum carbide and the rapid decarburization or decomposition of the filament at high temperatures.
  • FIG. 3 shows an unilaterally pinched bulb 1 with a piston 2 made of hard glass, and a pinch 3, in which two foils 4 are embedded.
  • a piston 2 made of hard glass
  • a pinch 3 in which two foils 4 are embedded.
  • On the film 4 each end outer (5) and inner power supply lines 6, which are connected in the interior of the piston with an axial filament 7.
  • the luminous body preferably breaks in exactly this area.
  • the task now is to protect or stabilize this area if possible so that the susceptibility to breakage in this area is reduced. This stabilization should allow at least a safe transport of the lamp to the customer.
  • the handling of the coils made of TaC is critical because of the still considerable brittleness of the TaC, so that this process control is usually out of the question.
  • an integral luminous element is used for this, in which the two power supply lines are a continuation of the coiled filament.
  • the filament and the power supply are made of a single wire.
  • the power supply is partially coated, with a certain distance of the coating to the filament is useful. The distance is based on the temperature that is reached in operation at the location of the boundary between the coated and uncoated part of the power supply.
  • the first preferred embodiment is based on the idea that prior to carrying out the carburization of the TaC helix, those points at which the carburization of the tantalum can not be completed due to the low temperatures occurring there and, accordingly, mainly the brittle subcarbide Ta 2 C is present, before being carried out the carburization by a coating to protect.
  • the coating is primarily intended to shield the tantalum in the respective regions from the carbon-containing atmosphere provided during carburization via the exhaust tube, so that no carburization occurs at these sites.
  • the protective layer must at least survive the carburizing process to ensure safe transport of the lamps to the customer. Thereafter, depending on the specific application, the protective layer is no longer necessarily needed; A - even partial - degradation of the protective layer by diffusion or chemical processes may then be tolerated. It is usually not desired.
  • the material of the protective layer must not melt or evaporate at the temperatures at which the brittle subcarbide would be formed without the protective layer, ie the melting point should preferably be above about 2000 ° C, better still significantly higher.
  • the coating at the outlets to places is placed so close to the luminous body, that the transition region between the uncoated and the coated places at the departure is already at such a high temperature in that at the area of the power supply immediately following the end of the coating, a complete carburization of the tantalum to tantalum carbide can take place.
  • the coating - at least in the areas near the transition to the uncoated area - must be so thin that here by the coating no increased heat dissipation is caused.
  • Typical layer thicknesses are 1 to 50 ⁇ m. The respective value depends on the coating material used and the thickness of the wire to be coated. In "colder" areas near the outlet, the coating may also be thicker in order to additionally achieve mechanical stabilization here. The layer thickness can therefore follow a gradient, the layer thickness increasing steadily or suddenly in the direction of the pinch edge.
  • the outlets are surrounded with a relatively thick layer of a material, in order to mechanically stabilize the outlets, and on the other hand, the points with the brittle transition phase Ta 2 C to places so close to the luminaire to move that takes place by "shortening of the lever arm" at impact load, an increase in shock resistance.
  • Typical layer thicknesses are in the range 50 to 200 microns.
  • the relatively thick protective coating performs a similar function to that in DE-Az 10 2004 014 211.4 Coating coil (not yet published).
  • metals which form carbides with carbon which are also brittle, but whose brittleness is not so great as that of Ta 2 C.
  • the metals tungsten, molybdenum, hafnium, niobium or zirconium or their carbides.
  • carbides of non-metals is also possible, such as boron carbide or silicon carbide.
  • the coating prevents or delays the carburization at the outlets; the coating spiral ensures further stabilization. It is important that the coating is extended beyond the end of the coating spiral out in the direction of the filament, since at the end of the coating filament often so low temperatures occur at which the carburization can not be completed.
  • the invention described here relates in particular to lamps with reduced piston volume, wherein the distance of the luminous element, in particular its luminous portions, from the inner wall of the piston is at most 18 mm.
  • the piston diameter is at most 35 mm, in particular in the range between 5 mm and 25 mm, preferably in the range between 8 mm and 15 mm.
  • pistons of such small dimensions in particular of such small diameter, the risk of separation of solids from the piston wall must be counteracted at all costs.
  • these small piston diameters can depending on the color temperature of the coil, the blackening of the bulb via a two-fold cycle, as it is still unpublished DE-Az 103 56 651.1 is described, significantly reduced or avoided.
  • the power supply is protected in that it is at least partially coated with a coating.
  • it is an axially or transversely to the axis arranged luminous body in a one-sided or two-sided closed, in particular squeezed piston.
  • the luminous element is preferably a single-coiled wire whose ends, which serve as a power supply, are uncoiled. Typical diameters of the wire for the luminous element are 50 to 300 ⁇ m. Typically, the filament is formed from 5 to 20 turns. A preferred gradient factor in order to achieve the highest possible stability of the luminous element is 1.4 to 2.8.
  • the coating extends to the region of the power supply, which enters from the piston interior into the piston material.
  • the piston is closed by one or two bruises. This area is called the pinch edge.
  • the breaking sensitivity is particularly high, especially in the area of the squish edge, since a high bending moment occurs here.
  • the coating extends over at least 10%, preferably over at least 50% and particularly preferably over at least 80%, of the length of the power supply in the interior of the piston. It is important for the coating according to the first embodiment with a relatively thin layer that the coating is pulled up to places so close to the luminous body, that the temperature at the unprotected sites is already so large that there is a complete carburization and the occurrence of the brittle Subcarbide Ta 2 C is avoided.
  • a coating according to the second embodiment serves as a support; It should be pulled up as far as possible to reach the greatest possible stabilization.
  • the piston can be specially adapted for this, for example elliptical or cylindrical, as known per se.
  • a particular advantage lies in the use of halogen fillings, since with suitable dimensioning not only a cyclic process for the material of the luminous body, but also for the material of the coating can be set in motion.
  • An example is a Re-Br cycle process using Re as the coating material and Br as the active halogen.
  • Such fillings are known per se. In particular, it is a filling for a dual cycle process, as in the unpublished DE-A 103 56 651.1 is described.
  • the construction of the invention is much simpler than previous designs, because, especially for NV applications up to 80 V, no quartz beam is needed and because usually can be dispensed with a Umspinnungsplanetaryl, and also because no problematic contacts between an already Maschinenbur mandat from TaC existing lighting fixtures and the power supply lines (welding or clamping or crimping) are required.
  • welding or clamping or crimping When handling an already Maschinenbur striv luminaire from TaC it is often damaged at the ends of the filament due to the brittleness of the material.
  • the material of the luminous element is TaC.
  • carbides of Hf, Nb or Zr are suitable.
  • the present invention is particularly suitable for low-voltage lamps with a voltage of at most 50 V, because the necessary filament can be made relatively solid and for the wires preferably a diameter between 50 microns and 300 microns, especially at most 150 microns for general lighting purposes with maximum power of 100 W, exhibit. Thick wires up to 300 ⁇ m are used in particular for photo-optical applications up to a power of 1000 W.
  • the invention is used for one-sided squeezed lamps, since the luminous body can be kept relatively short, which also reduces the susceptibility to breakage. But the use for double-sided squeezed lamps and mains voltage lamps is conceivable.
  • FIG. 1 shows a bulb pinched on one side 1 with a piston made of quartz glass 2, a pinch seal 3, and inner power supply lines 6, the films 4 in the pinch seal 3 with a filament 7 connect.
  • the luminous element is a simply wound, axially arranged wire made of TaC, whose uncoiled ends 14 are continued transversely to the lamp axis.
  • the outer leads 5 are attached to the outside of the foils 4.
  • the inner diameter of the piston is 5 mm.
  • the coil ends 14 are then bent parallel to the lamp axis and form the inner power supply lines 6 as an integral extension.
  • the power supply lines 6 are provided with a coating 8 over at least the part of their entire length which does not become hotter than 2000 ° C. during operation. This consists of a material as shown below.
  • the metals rhenium (melting point: 3453 K), ruthenium (melting point: 2583 K), osmium (melting point: 3318 K), and iridium (melting point: 2683 K) do not form carbides or only to a small extent carbides. In them, carbon is soluble only to a relatively small extent. They are largely impermeable to carbon, cf. z.
  • the patent US 1854970 One possibility is therefore those areas of the initially consisting of tantalum filament, which only heated to temperatures below about 2500 K. be surrounded with a protective layer of these metals.
  • the thickness of the protective layer must be chosen sufficiently large to survive at least the carburizing process. Typical are layer thicknesses between 1 .mu.m and 50 .mu.m; depending on the design of the carburizing process.
  • the order of the metals can be carried out, for example, electrolysis, CVD deposition or sputtering processes.
  • the material of the protective layer can also consist of refractory compounds which must not react with the tantalum of the outlets of the filament, nor with the carbon-containing atmosphere of the lamp or may not diffuse into the tantalum.
  • HfB 2 , ZrB 2 , NbB 2 and TiB 2 are stable to carbides at least up to 2800K against reaction with carbon containing compounds. Furthermore, the compounds HfB 2 , ZrB 2 and NbB 2 are stable over the entire temperature range of interest here to a reaction with tantalum, whereas TiB 2 reacts with tantalum to form TaB 2 (the resulting titanium has too low a melting point anyway). Thus, for example, HfB 2 , ZrB 2 and NbB 2 are possible materials for the required protective layers since they react neither with the tantalum substrate nor with the carbon-containing atmosphere of the lamp.
  • relatively small layer thicknesses can be used, which are preferably in the range between 0.5 .mu.m and 5 .mu.m.
  • the use of tantalum boride may be useful in some cases, since the tantalum boride does not react with the carbon in the gas phase and the boron must first diffuse into the interior of the wire, which further diffuses the Carbon is delayed sufficiently long.
  • the nitrides HfN, ZrN, NbN, TiN, VN and TaN are stable against reaction with methane-derived carbon to carbides only up to temperatures of about 1000K or below.
  • ZrN reacts up to relatively high temperatures (about 1500 K) not with the carbon in the lamp atmosphere, also HfN (up to 1100 K resistant) is relatively stable.
  • ZrN and HfN do not react with tantalum at TaN in the temperature range in question, ie zirconium nitride and hafnium nitride are more stable than tantalum nitride.
  • NbN and VN can react with the tantalum to TaN; TiN decomposes at too low temperatures around 2000 K.
  • the two materials HfN and ZrN are conditionally suitable as material for protective coatings.
  • a certain reaction time is required, which - depending on the process in the carburization and thickness of the applied layers - may be sufficient to the underlying area of the tantalum wire before to protect a carburation.
  • a coating of the tantalum wire in the range in question with TaN may in individual cases be sufficient to slow carburization of the region in question so that in practice it plays no role during the carburization of the luminous body.
  • the tantalum wire may first be coated with ZrN or HfN, both of which do not react with tantalum in the range of temperatures in question.
  • the first layer applied to the tantalum may then be further coated with e.g. Rhenium, osmium etc. are coated, which react neither with the ZrN or HfN still with the carbon from the lamp atmosphere.
  • Rhenium, osmium etc. are coated, which react neither with the ZrN or HfN still with the carbon from the lamp atmosphere.
  • the respective less desirable properties of the individual layer systems - namely the diffusion of the metals rhenium, osmium, etc. into the tantalum and the reaction of zirconium nitride and hafnium nitride to the respective carbides - can be avoided.
  • Such systems are stable for relatively long periods.
  • the decay of the boron nitride with subsequent reaction of the tantalum to tantalum (di) boride and also the less stable tantalum nitride proceeds usually progressing so slowly that the carburization of the tantalum is delayed for a sufficient amount of time.
  • boron carbide in its disintegration preferably the more stable tantalum (di) boride is formed and not the tantalum carbide. The time required for the decay of the boron carbide, the reaction with the tantalum and the diffusion of the boron atoms into the interior of the tantalum delay the carburization.
  • a special case of the examples described above is the passivation of the outlets - which consist of tantalum prior to carburization - by boriding or nitriding, whereby the carburization in the critical temperature range is delayed or prevented sufficiently long in the subsequent Karburierrind.
  • no protective layer is applied to the outlets, but the surface "passivated” by chemical reaction of the tantalum with boron or nitrogen or the rate of carburization sufficiently low.
  • the outlets of the luminous element in this case are coated with a layer whose thickness is preferably in the range between one-tenth and one-half the diameter of the tantalum wire to be coated.
  • a layer whose thickness is preferably in the range between one-tenth and one-half the diameter of the tantalum wire to be coated.
  • tungsten, molybdenum, hafnium, zirconium or other carbide-forming materials may additionally be considered as coating materials.
  • the protective layer consists of tantalum or one uses from the outset in the area of the outlets tantalum wires of larger diameter than in the area of the filament.
  • the described procedures can also be applied to lamps with carbides of metals other than luminous bodies such as hafnium carbide or zirconium carbide or niobium carbide.
  • FIG. 2 shows a two-sided squeezed incandescent lamp 20, also known as Soffitte, with a piston made of quartz glass 21, two pinch 24 and 25, leads 27, which are connected to a luminous element 26.
  • the inner diameter of the piston is 15 mm.
  • the luminous element 26 is simply coiled and consists of TaC.
  • the power supply lines 27 are partially covered with a coating 30 of hafnium boride and terminate in base portions 28, as is well known, sitting on the pinch 24, 25.
  • the coating or a part thereof, which does not comprise the peak temperature reached at the coating nor be surrounded by a wrapping of helical wire or a solid sleeve, for example made of molybdenum, as in principle DE-Az 10 2004 014 211.4 (not yet published).
  • the lamp preferably uses a filament of tantalum carbide, which preferably consists of a single-coiled wire.
  • the piston is made of quartz glass or hard glass with a piston diameter between 5 mm and 35 mm, preferably between 8 mm and 15 mm.
  • the filling is mainly inert gas, in particular noble gas such as Ar, Kr or Xe, possibly with the addition of small amounts (up to 15 mol%) of nitrogen.
  • Added to this is a hydrocarbon, hydrogen and a halogen additive.
  • Zirconium carbide, hafnium carbide, or an alloy of various carbides such as, for example, in US Pat US-A 3 405 328 described.
  • a luminous body which consists of a support material such as a rhenium wire core or a carbon fiber, said core is coated with tantalum carbide or another metal carbide, see the unpublished application DE-Az 103 56 651.1 ,
  • Another possibility is to first deposit carbon on the luminous body consisting of TaC, for example by heating the TaC luminous body in an atmosphere with a high CH 4 concentration. Tantalum carbide is then deposited on this carbon layer.
  • tantalum can be deposited in a CVD process, which is then carburized either by the enclosed carbon and / or externally by heating in an atmosphere containing, for example, CH 4 .
  • the hydrogen content is at least the carbon content, preferably two to eight times the carbon content.
  • the halogen content is at most half, in particular one fifth to one twentieth, in particular to one tenth, of the carbon content.
  • the halogen content should at most equal to the hydrogen content, preferably at most half of the hydrogen content.
  • a guideline for the halogen content is 500 to 5000 ppm. All these data refer to a cold filling pressure of 1 bar. If the pressure changes, the individual concentration data must be converted so that the absolute quantities of substance are retained; e.g. Halve all concentration data in ppm at a pressure doubling.
  • the color temperature is 3800 K. It uses a TaC wire (obtained from carburized tantalum) with a diameter of 125 ⁇ m. He is simply coiled and shows a much better fracture behavior than lamps with uncoated outlets. The fracture tests were carried out with a beater.
  • the electrodes ie massive power supply of mostly molybdenum or tungsten, during lamp operation slowly carbon from the Gas phase record and thus act as a "getter” for carbon, at least in the hotter areas near the attachment of the filament. This disturbs the cycle in the lamp; a return of carbon to the lamp is no longer possible.
  • the electrodes may be coated with a layer of the above metals rhenium, osmium, ruthenium, or iridium.
  • the coatings of the electrodes with, for example, hafnium boride, zirconium boride and niobium boride. Since, for example, molybdenum boride is more stable than molybdenum carbide, the electrodes can be passivated by boron from the outside. Another possibility is the coating of the Mo or W electrodes with nitrides such as hafnium nitride, zirconium nitride, niobium nitride; Although these compounds are slowly converted into carbides during carburization or during operation of the lamp, the time required for this is sufficiently high given a sufficiently thick layer thickness. Even a complete design of the massive power supply of one of the metals mentioned is possible.
  • Coated luminaires are suitable for transporting the lamp under normal conditions.
  • the filament is so fragile that special measures would have to be taken for the transport of the lamp.
  • the discarding of the filament is reduced the shorter the filament outlets are selected.
  • the cause of the discarding is the volume increase in the carburization. This increase is noticeable in particular by an increase in length. It has been shown that the disturbing discarding does not lead to a tilting within the turns of the filament, but that the filament as a whole tilts laterally out of the axial position.
  • the avoidance of rejection is an unconditional prerequisite for the use of interference filters on the piston in the sense of an IRC coating, as is known per se, see EP 765 528 ,
  • the outer diameter of the additional use of a sleeve corresponds to a maximum of twice the diameter of the wire of the lamp. The thinner the sleeve, the lower its weight.
  • a very specific filling consists of the following components: 1 bar (cold filling pressure) Kr + 1% C 2 H 4 + 1% H 2 + 0.05% CH 2 Br 2 .
  • the concentration data are mol%.
  • the material of the power supply lines may have portions of the metal or of the metal carbide in the luminous element in a different stoichiometry. This case occurs in particular when a coating material such as rhenium diffuses into a wire of other metal such as tantalum.

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  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
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Claims (21)

  1. Lampe à incandescence ayant un corps ( 7 ) lumineux contenant du carbure et des entrées ( 6 ) de courant, qui maintiennent le corps lumineux, un corps ( 7 ) lumineux étant introduit d'une manière étanche au vide dans une ampoule ( 2 ) ensemble avec un remplissage, le corps lumineux comportant un carbure métallique dont le point de fusion est supérieur à celui du tungstène, les entrées de courant étant fabriquées d'un seul tenant avec le corps lumineux en un fil, et au moins une partie de l'entrée de courant étant entourée d'un revêtement ( 8 ), caractérisée en ce que le revêtement ( 8 ) sur l'entrée ( 6 ) de courant s'étend jusqu'à un point si proche du corps lumineux que la température de la partie non revêtue de l'entrée de courant est d'au moins 2000°C ou lui est supérieure.
  2. Lampe à incandescence suivant la revendication 1, caractérisée en ce que le corps lumineux est au moins sur sa surface en carbure de tantale et est, notamment, un fil à bobinage simple.
  3. Lampe à incandescence suivant la revendication 1, caractérisée en ce que l'ampoule ( 2 ) est en verre au quartz ou en verre dur, en ayant un diamètre compris entre 5 mm et 35 mm, de préférence entre 8 mm et 15 mm.
  4. Lampe à incandescence suivant la revendication 1, caractérisée en ce que le remplissage contient du gaz inerte, notamment du gaz rare avec, le cas échéant, addition de petites quantités d'azote, ainsi que d'au moins un hydrocarbure d'hydrogène et d'au moins un additif halogéné.
  5. Lampe à incandescence suivant la revendication 1, caractérisée en ce que le corps ( 7 ) lumineux est un fil à bobinage simple, ayant de préférence un diamètre de 50 à 300 µm, notamment allant jusqu'à 150 µm.
  6. Lampe à incandescence suivant la revendication 1, caractérisée en ce que l'épaisseur du revêtement représente au maximum le quart du diamètre du fil.
  7. Lampe à incandescence suivant la revendication 1, caractérisée en ce que le revêtement est en rhénium ou en osmium ou en iridium ou en ruthénium ou en leurs mélanges.
  8. Lampe à incandescence suivant la revendication 6, caractérisée en ce que le revêtement est en un borure d'hafnium ou de zirconium ou de niobium ou de tantale ou en leurs mélanges.
  9. Lampe à incandescence suivant la revendication 1, caractérisée en ce que le revêtement est en un nitrure de métal, notamment en un nitrure d'hafnium ou en un nitrure de zirconium ou en un nitrure de tantale ou en un composé non métallique, notamment en boronitrure ou en borocarbure ou en carbure de silicium ou en l'un de leurs mélanges.
  10. Lampe à incandescence suivant la revendication 1,
    caractérisée en ce que les entrées ( 6 ) de courant sont rendues étanches dans une ou dans deux parties d'étanchéité de l'ampoule, le revêtement s'étendant au moins jusqu'à la surface limite de la partie d'étanchéité.
  11. Lampe à incandescence suivant la revendication 1, caractérisée en ce que les entrées ( 6 ) de courant sont en métal, notamment en tantale, et le corps lumineux en carbure de métal, notamment en carbure de tantale, les entrées de courant étant munies d'un revêtement qui a été obtenu par le fait que les entrées de courant sont passivées par une réaction chimique effectuée au préalable jusqu'à un point si proche du corps lumineux que la température de la partie non passivée est d'au moins 2000°C ou lui est supérieure.
  12. Lampe à incandescence suivant la revendication 11, caractérisée en ce que le revêtement est en borure de tantale ou en nitrure de tantale ou en l'un de leurs mélanges.
  13. Lampe à incandescence suivant la revendication 1, caractérisée en ce que l'épaisseur du revêtement représente au moins le quinzième du diamètre du fil de l'entrée de courant.
  14. Lampe à incandescence suivant la revendication 1, caractérisée en ce que le corps ( 7 ) lumineux est en carbure de tantale, le revêtement étant en les matériaux tungstène, molybdène ou hafnium ou zirconium ou tantale ou niobium ou éventuellement leurs carbures.
  15. Lampe à incandescence suivant la revendication 1, caractérisée en ce que la couche est constituée d'une première couche, un deuxième revêtement ou un enrobage, qui recouvre, en tout ou partie, le premier revêtement.
  16. Lampe à incandescence suivant la revendication 15, caractérisée en ce que la première couche déposée sur l'entrée de courant ne réagit pas sur le matériau de l'entrée de courant, la deuxième couche en contact avec le remplissage ne réagit pas sur le remplissage et les matériaux des deux couches ne réagissent entre eux et ne diffusent pas l'un dans l'autre, au moins pendant la durée de la carburation.
  17. Lampe à incandescence suivant la revendication 15, caractérisée en ce que la première couche déposée directement sur l'entrée du courant est en nitrure de zirconium ou en nitrure d'hafnium et la deuxième couche en contact avec le remplissage est en rhénium ou en osmium.
  18. Lampe à incandescence suivant la revendication 1, caractérisée en ce que l'entrée de courant allant vers le corps lumineux est fixée à une autre entrée de courant constituée, par exemple, en W ou en Mo, considérablement plus grande, ce que l'on appelle l'électrode, les entrées de courant allant au corps lumineux étant revêtues, sur toute la longueur ou seulement en partie dans les zones les plus chaudes proches de la fixation du corps lumineux, suivant une façon décrite dans les revendications précédentes.
  19. Lampe à incandescence suivant la revendication 18, caractérisée en ce que l'électrode est revêtue à la surface de rhénium ou d'osmium ou de ruthénium ou d'iridium.
  20. Lampe à incandescence suivant la revendication 18, caractérisée en ce que l'électrode est revêtue sur la surface de borures comme, par exemple, de borure d'hafnium ou de borure de nobium ou de borure de zirconium, ou de nitrures comme de nitrure d'hafnium ou de nitrure de nobium ou de nitrure de zirconium.
  21. Lampe à incandescence suivant la revendication 18, caractérisée en ce que l'électrode est passivée sur la surface, notamment par boruration.
EP05763639A 2004-07-19 2005-07-06 Lampe a incandescence a element lumineux contenant du carbure Not-in-force EP1769526B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004034786A DE102004034786A1 (de) 2004-07-19 2004-07-19 Glühlampe mit carbidhaltigem Leuchtkörper
PCT/DE2005/001198 WO2006007814A1 (fr) 2004-07-19 2005-07-06 Lampe a incandescence a element lumineux contenant du carbure

Publications (2)

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EP1769526A1 EP1769526A1 (fr) 2007-04-04
EP1769526B1 true EP1769526B1 (fr) 2009-12-30

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Application Number Title Priority Date Filing Date
EP05763639A Not-in-force EP1769526B1 (fr) 2004-07-19 2005-07-06 Lampe a incandescence a element lumineux contenant du carbure

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US (1) US20080012488A1 (fr)
EP (1) EP1769526B1 (fr)
JP (1) JP4571976B2 (fr)
CN (1) CN100583387C (fr)
AT (1) ATE453925T1 (fr)
CA (1) CA2573622A1 (fr)
DE (2) DE102004034786A1 (fr)
WO (1) WO2006007814A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2977798B1 (fr) 2011-07-13 2016-07-29 Urgo Lab Utilisation de composes oligosaccharidiques pour la prevention et le traitement des cicatrices pathologiques
JP6487621B2 (ja) * 2014-01-22 2019-03-20 スタンレー電気株式会社 赤外光源
FR3043556B1 (fr) 2015-11-17 2020-01-10 Urgo Recherche Innovation Et Developpement Utilisation de composes oligosaccharidiques pour activer l'angiogenese
FR3060392B1 (fr) 2016-12-19 2019-07-12 Urgo Recherche Innovation Et Developpement Utilisation de composes oligosaccharidiques pour activer l'epidermisation
FR3066390B1 (fr) 2017-05-17 2019-07-12 Urgo Recherche Innovation Et Developpement Utilisation de composes oligosaccharidiques pour traiter les plaies des patients diabetiques arteriopatiques
FR3113583A1 (fr) 2020-08-26 2022-03-04 Urgo Recherche Innovation Et Developpement Utilisation de composes oligosaccharidiques pour augmenter l’oxygenation de la peau lors du traitement des plaies ischemiques
FR3117012A1 (fr) 2020-12-07 2022-06-10 Urgo Recherche Innovation Et Developpement Utilisation topique de la metformine pour diminuer l’inflammation dans la peau

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NL260575A (fr) * 1960-01-29
NL6513874A (fr) * 1965-10-27 1967-04-28
US3405328A (en) * 1966-03-02 1968-10-08 Westinghouse Electric Corp Incandescent lamp with a refractory metal carbide filament
US3524693A (en) * 1967-08-17 1970-08-18 Tokyo Shibaura Electric Co Method for assembling a carbide filament incandescent lamp
JPS5281975A (en) * 1975-12-29 1977-07-08 Iwasaki Electric Co Ltd High-melting point carbide filament
DE3610922A1 (de) * 1986-03-24 1987-10-01 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Halogengluehlampe
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EP0573114B1 (fr) * 1992-06-05 1997-01-22 Koninklijke Philips Electronics N.V. Lampe électrique
JPH07296783A (ja) * 1994-04-27 1995-11-10 Toshiba Lighting & Technol Corp 車両用ハロゲン電球およびこれを用いた前照灯
DE4420607A1 (de) * 1994-06-13 1995-12-14 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Elektrische Glühlampe und Leuchtkörper für Glühlampen
JPH08185831A (ja) * 1994-12-28 1996-07-16 Matsushita Electron Corp 管 球
US6777859B1 (en) * 1999-08-22 2004-08-17 Ip2H Ag Light source
DE10218412A1 (de) * 2002-04-24 2003-11-06 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Einschmelzfolie und zugehörige Lampe mit dieser Folie
DE102004014211A1 (de) * 2004-03-23 2005-10-13 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Glühlampe mit carbidhaltigem Leuchtkörper

Also Published As

Publication number Publication date
US20080012488A1 (en) 2008-01-17
WO2006007814A1 (fr) 2006-01-26
CA2573622A1 (fr) 2006-01-26
EP1769526A1 (fr) 2007-04-04
ATE453925T1 (de) 2010-01-15
DE502005008792D1 (de) 2010-02-11
JP2008507099A (ja) 2008-03-06
CN1989590A (zh) 2007-06-27
CN100583387C (zh) 2010-01-20
JP4571976B2 (ja) 2010-10-27
DE102004034786A1 (de) 2006-03-16

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