EP2272081A2 - Elektrodengestell für eine entladungslampe und verfahren zum herstellen eines elektrodengestells sowie entladungslampe - Google Patents
Elektrodengestell für eine entladungslampe und verfahren zum herstellen eines elektrodengestells sowie entladungslampeInfo
- Publication number
- EP2272081A2 EP2272081A2 EP09737947A EP09737947A EP2272081A2 EP 2272081 A2 EP2272081 A2 EP 2272081A2 EP 09737947 A EP09737947 A EP 09737947A EP 09737947 A EP09737947 A EP 09737947A EP 2272081 A2 EP2272081 A2 EP 2272081A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrode frame
- electrode
- paste
- frame according
- power supply
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 50
- 229910052987 metal hydride Inorganic materials 0.000 claims abstract description 28
- 150000004681 metal hydrides Chemical class 0.000 claims abstract description 28
- 239000011521 glass Substances 0.000 claims description 13
- 239000002904 solvent Substances 0.000 claims description 8
- 239000011230 binding agent Substances 0.000 claims description 7
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 6
- 229910052753 mercury Inorganic materials 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 229910000497 Amalgam Inorganic materials 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 2
- 229910052735 hafnium Inorganic materials 0.000 claims description 2
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims description 2
- 229910021647 smectite Inorganic materials 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 239000010936 titanium Substances 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 150000004678 hydrides Chemical class 0.000 description 15
- 239000007789 gas Substances 0.000 description 14
- 239000001257 hydrogen Substances 0.000 description 13
- 229910052739 hydrogen Inorganic materials 0.000 description 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 239000011324 bead Substances 0.000 description 5
- 239000006254 rheological additive Substances 0.000 description 5
- 239000000725 suspension Substances 0.000 description 5
- 206010011906 Death Diseases 0.000 description 4
- 238000001994 activation Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 230000004913 activation Effects 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 239000002707 nanocrystalline material Substances 0.000 description 3
- -1 titanium hydride Chemical compound 0.000 description 3
- 229910000048 titanium hydride Inorganic materials 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910016952 AlZr Inorganic materials 0.000 description 1
- 229910000600 Ba alloy Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 239000004990 Smectic liquid crystal Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- QXJJQWWVWRCVQT-UHFFFAOYSA-K calcium;sodium;phosphate Chemical compound [Na+].[Ca+2].[O-]P([O-])([O-])=O QXJJQWWVWRCVQT-UHFFFAOYSA-K 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229910052743 krypton Inorganic materials 0.000 description 1
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- LEDMRZGFZIAGGB-UHFFFAOYSA-L strontium carbonate Chemical class [Sr+2].[O-]C([O-])=O LEDMRZGFZIAGGB-UHFFFAOYSA-L 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
- H01J61/26—Means for absorbing or adsorbing gas, e.g. by gettering; Means for preventing blackening of the envelope
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J7/00—Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps
- H01J7/14—Means for obtaining or maintaining the desired pressure within the vessel
- H01J7/18—Means for absorbing or adsorbing gas, e.g. by gettering
- H01J7/186—Getter supports
Definitions
- the invention relates to an electrode frame for a discharge lamp and a discharge lamp, in particular a mercury low-pressure discharge lamp. Moreover, the invention relates to a method for producing an electrode frame for a discharge lamp.
- Fluorescent lamps need to be manufactured with a high-purity gas filling to meet the requirements of long life and high efficiency. However, since the process times for introducing the filling gas are relatively short, this presents a great challenge.
- Gettersysteme such. As aluminum, barium or magnesium alloys are activated by high frequency heating. The resulting reactive vapors can absorb and bind contaminants from the gas phase (adsorption or chemical bonding). The vapors deposited on the free, inner surface of the lamp can also bind contaminants during lamp life up to their maximum capacity.
- a disadvantage of metal getters is that the getter materials already emit gases during processing. which subsequently reduces the getter capacity in the finished lamp.
- the use of particularly fine-grained metal hydride powder is also known, to which partial tungsten powder is admixed, which is intended to avoid co-sintering of the fine powder during the activation process.
- the materials are introduced as a compact in the gas discharge vessel.
- the activation also takes place in a separate process step, in which case hydrogen escapes, which is pumped out of the gas discharge vessel.
- an electrode frame comprising the features of claim 1, a discharge lamp having the features of claim 14, and a method comprising the features of claim 15.
- An inventive electrode frame for a discharge lamp comprises a first and a second power supply, which are connected to an electrode.
- the electrode frame comprises a metal hydride terial, which is arranged on the electrode frame.
- the metal hydride material is formed as a paste or contained in a paste material.
- the metal hydride material in the form of a paste can thus preferably also be applied to positions where it has no electrically insulating attachment to the power supply lines and the like.
- the metal hydride material comprises titanium and / or zirconium and / or hafnium.
- the paste is highly viscous.
- the paste comprises adhesives and / or binders and is introduced into a solvent together with the metal hydride material to form the paste prior to application to the electrode frame.
- the hydride or the hydride mixture is thus introduced into a solvent with the addition of adhesives and / or binders and prior to installation of the electrode frame and thus with also the electrode in the lamp body applied to a specific part of the electrode frame.
- the solvent is water.
- the binder is a rheological additive.
- this rheological additive is based on a highly purified, easily dispersible smectite.
- Such a rheological additive is for example Bentone.
- the mean grain size of the metal hydride material is preferably between 55 ⁇ m and 65 ⁇ m, in particular 60 ⁇ m. However, it can also be provided that the metal hydride material is nanocrystalline and has a particle size of less than 110 mm, in particular less than 100 mm.
- the paste is at least partially applied directly to an electrical insulating element connecting the power supply lines.
- This electrically insulating element is preferably a spaced from the ends of the power supply and formed of glass material plug, which is also commonly referred to as a glass bead.
- this element is a plate foot formed of a glass material and formed on the ends facing away from the electrode.
- This plate base is usually formed around the ends of the power supply leads, which are opposite to the ends facing the electrode.
- the paste is at least partially applied directly to a power supply and thus directly in contact with the materials of the power supply.
- the paste is at least partially directly on at least one power supply and / or on a the electrode clamping part and / or on a start-amalgam carrier and / or on at least one end of the E- lektrode, in particular a emitter sheer end of the elec- , applied.
- the application takes place in the form of a highly viscous paste, wherein here preferably titanium hydride powder is introduced into water as a solvent, and the rheological additive is added as a binder.
- This paste is preferably applied to the glass bead between the power supply lines of the electrode or lamps with a cup base on the glass plate by the power supply lines are embedded.
- a contact is made at least to one of the two power supply lines.
- coarse-grained material with a mean grain size of 60 ⁇ m is used here.
- the paste is not applied to the glass bead or the plate foot, but as close to the electrode, and is attached directly to the power supply lines, for example, and this at points of the power supply, close or adjacent to the electrode are arranged.
- this material is additionally or instead attached to the spiral clamps.
- this paste is preferably applied to the emitter-free ends of the helix or the electrode a very fine-grained material, which preferably has nanocrystalline material with particle sizes of less than 100 mm, can be sprayed in the form of a low-viscosity suspension instead of a water-based high-viscosity paste, as is the case, for example, with AlZr getters added further additives to improve the adhesion to the electrode frame, for example, small additions of aluminum powder.
- a further aspect of the invention relates to an electrode frame for a discharge lamp having a first and a second power supply, which are connected to an electrode, and a metal hydride material, which is arranged on the electrode frame, wherein the metal hydride material as a suspension, in particular low-viscosity suspension on attached to the electrode frame, in particular sprayed on.
- advantageous embodiments according to the first aspect of an inventive electrode frame are also to be regarded as advantageous embodiments of an electrode frame according to the invention according to the second aspect.
- the invention relates to a discharge lamp, in particular a low-pressure mercury discharge lamp, with at least one electrode frame according to the cited Aspects of the invention or an advantageous embodiment thereof.
- the invention relates to a method for producing an electrode frame for a discharge lamp, in which metal hydride material is applied as a paste or as a suspension to the at least two power supply lines of an electrode having electrode frame.
- hydrides or hydride mixtures as getter materials in discharge lamps, in particular low-pressure mercury discharge lamps, the gas purity of the lamps can be significantly improved, whereby a significant extension of the life of this lamp can be achieved.
- the hydride or the hydride mixture as a paste directly onto the electrode frame eliminates the costly production of a compact. There is no need for a separate device for fixing the compact in the lamp, and the placement in the lamp is thereby simplified.
- the activation of the hydrides can be omitted as a separate process step, since the heat development of the electrode coil during the emitter Formiervorgangs, usually decomposition of barium, calcium and strontium carbonates to the corresponding oxides with release of CO and CO 2 can be used ,
- the dried hydride paste is exposed to the radiant heat of the electrode, whereby at the same time at least part of the hydrogen is released from the hydride or hydride mixture during the formation of the emitter paste, and the resulting hydrogen is rinsed and / or pumped off together with the emitter decomposition products is removed from the lamp.
- at least part of the introduced hydride paste is present in metallic form in the finished lamp and can pick up contamination from the lamp fill gas.
- a titanium hydride paste having an average grain size of 60 ⁇ m which may already be preferably used for end of life protection in compact fluorescent lamps.
- the paste is applied to the side of the glass bead between the two power leads of each electrode.
- the heat load in the manufacture of the lamp body which includes a squeezing process, and the radiant heat of the electrode during the forming process.
- at least one contact with at least one of the power supply leads is preferably produced in order to increase the temperature of the material by the heat conduction via the power supply and thereby to improve the hydrogen release during the forming process and the pickup of contaminants during lamp operation.
- the partial hydrogen depletion of the metal hydride material preferably occurs in the outer regions of the paste body which are most exposed to the heat radiation of the electrode. As a result, it can be prevented at the same time that the residual hydrogen from the paste is prematurely released already by the temperature load in normal lamp operation and leads to the early failure of the lamp.
- the hydride paste is preferably used only for life extension because the lamp does not require an end-of-life function. It can therefore be used very fine-grained, preferably nanocrystalline material, which is then applied as close to the electrode. Thereby, a complete release of the hydrogen during the forming process can be achieved, wherein the capacity and capacity of the hydrogen-free getter material in the lamp operation increases the capacity for Geargasverungraphy compared to the coarse-grained material is increased.
- FIG. 1 shows a schematic representation of a first exemplary embodiment of an electrode frame according to the invention.
- Fig. 2 is a schematic representation of a second embodiment of an electrode frame according to the invention.
- an electrode frame 1 is shown, which is associated with a mercury low-pressure discharge lamp.
- the electrode frame 1 extends at least partially into a discharge space in the interior of a discharge vessel.
- the electrode frame 1 comprises a first power supply 2 and a second power supply 3. Through this power supply 2 and 3, an electrode 4 is held.
- an electrode 4 is held at the ends 6 and 8 of the power supply lines 2 and 3 clamping elements 11 and 12 are arranged, by means of which the electrode 4 is held at its ends 14 and 15.
- the middle part 13 of the electrode 4 is provided with an emitter paste, whereas the end pieces 14 and 15 are provided without such an emitter paste.
- the electrode frame 1 further comprises an electrically insulating element 9, which is formed of glass material and is referred to as glass bead, and which is spaced from the upper ends 6 and 8 and also to the lower ends 5 and 7 of the power supply lines 2 and 3 respectively and extends between the two power supply lines 2 and 3 and connects them together.
- the electrode frame 1 further comprises a metal hydride material, which is formed as a paste 10 in the embodiment both directly on the element 9 and directly on the power supply 3.
- the paste 10 is in the form of a highly viscous paste, wherein the paste of metal hydride material preferably comprises titanium hydride powder and is introduced into water as solvent, wherein the binder provided is a rheological additive based on a highly purified, easily dispersible smectic acid is.
- the metal hydride material is a coarse-grained material having an average grain size of 60 ⁇ m.
- the electrode frame 1 moreover has a cup base or a glass plate, which surrounds the power supply lines 2 and 3 at the ends 5 and 7, so that the power supply lines are embedded at these ends 5 and 7 in this plate foot , Also, in addition to or instead of the paste 10 may be applied directly.
- FIG. 2 shows a further exemplary embodiment of an electrode frame 1, which is likewise arranged in a low-pressure mercury discharge lamp.
- the paste material having the metal hydride material is applied directly to the power supply lines 2 and 3 as paste 16 on the one hand and as paste 17 on the other hand.
- an application to the power supply lines between the element 9 and the clamps 11 and 12 is provided, so that the pastes 16 and 17 are positioned as close as possible to the electrode 4.
- Fig. 2 are also applied directly to the clamps 11 and / or 12.
- these pastes 16 and 17 are formed directly in addition to or instead of on the end pieces 14 and 15 and thus on the emitter-free end pieces of the elec- trode 4. This is particularly advantageous for cold start lamps.
- the metal hydride material used can be a very fine-grained material, which is preferably nanocrystalline material with particle sizes of less than 100 nm. Except in the form of a highly viscous paste 16 or 17 advantageously water-based as a solvent, the fine-grained material can also be sprayed in the form of a low-viscosity suspension.
- a further additive for improving the adhesion on the electrode 4 or in the electrode frame 1 is added in this spraying, wherein aluminum is particularly advantageous as an additive.
- FIG. 2 also shows a plate base 18 on which the paste material can also be applied.
- the paste can be applied to the starting amalgam carrier.
Landscapes
- Discharge Lamp (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200810021349 DE102008021349A1 (de) | 2008-04-29 | 2008-04-29 | Elektrodengestell für eine Entladungslampe und Verfahren zum Herstellen eines Elektrodengestells sowie Entladungslampe |
| PCT/EP2009/053460 WO2009132903A2 (de) | 2008-04-29 | 2009-03-24 | Elektrodengestell für eine entladungslampe und verfahren zum herstellen eines elektrodengestells sowie entladungslampe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2272081A2 true EP2272081A2 (de) | 2011-01-12 |
| EP2272081B1 EP2272081B1 (de) | 2013-08-14 |
Family
ID=40933478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09737947.3A Not-in-force EP2272081B1 (de) | 2008-04-29 | 2009-03-24 | Elektrodengestell für eine entladungslampe und verfahren zum herstellen eines elektrodengestells sowie entladungslampe |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2272081B1 (de) |
| CN (1) | CN102017059A (de) |
| DE (1) | DE102008021349A1 (de) |
| WO (1) | WO2009132903A2 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201701576D0 (en) * | 2017-01-31 | 2017-03-15 | Ge Healthcare Bio Sciences Ab | Method and system for transferring separation resin |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3525009A (en) * | 1968-02-05 | 1970-08-18 | Tokyo Shibaura Electric Co | Low pressure mercury vapour discharge lamp including an alloy type getter coating |
| US4495440A (en) * | 1982-08-23 | 1985-01-22 | Gte Products Corporation | Arc-extinguishing ampul and fluorescent lamp having such ampul mounted on each electrode structure |
| IT1173866B (it) | 1984-03-16 | 1987-06-24 | Getters Spa | Metodo perfezionato per fabbricare dispositivi getter non evarobili porosi e dispositivi getter cosi' prodotti |
| US5705887A (en) | 1995-02-17 | 1998-01-06 | Osram Sylvania Inc. | Fluorescent lamp with end of life arc quenching structure |
| US5585693A (en) | 1995-02-17 | 1996-12-17 | Osram Sylvania Inc. | Fluorescent lamp with end of life arc quenching structure |
| DE10218827A1 (de) * | 2002-04-26 | 2003-11-06 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Niederdruckentladungslampe mit Abschaltvorrichtung am Lebensdauerende |
| JP2005235659A (ja) * | 2004-02-20 | 2005-09-02 | Toshiba Lighting & Technology Corp | 蛍光ランプおよび照明器具 |
-
2008
- 2008-04-29 DE DE200810021349 patent/DE102008021349A1/de not_active Withdrawn
-
2009
- 2009-03-24 EP EP09737947.3A patent/EP2272081B1/de not_active Not-in-force
- 2009-03-24 CN CN200980115563.2A patent/CN102017059A/zh active Pending
- 2009-03-24 WO PCT/EP2009/053460 patent/WO2009132903A2/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009132903A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102017059A (zh) | 2011-04-13 |
| WO2009132903A2 (de) | 2009-11-05 |
| EP2272081B1 (de) | 2013-08-14 |
| WO2009132903A3 (de) | 2010-08-05 |
| DE102008021349A1 (de) | 2009-11-05 |
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