EP2054918A2 - Quecksilberquelle - Google Patents
QuecksilberquelleInfo
- Publication number
- EP2054918A2 EP2054918A2 EP07821601A EP07821601A EP2054918A2 EP 2054918 A2 EP2054918 A2 EP 2054918A2 EP 07821601 A EP07821601 A EP 07821601A EP 07821601 A EP07821601 A EP 07821601A EP 2054918 A2 EP2054918 A2 EP 2054918A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- amalgam
- mercury
- source
- perforated structure
- low
- 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- Withdrawn
Links
- 229910052753 mercury Inorganic materials 0.000 title claims abstract description 68
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 229910000497 Amalgam Inorganic materials 0.000 claims abstract description 113
- 238000004519 manufacturing process Methods 0.000 claims abstract description 26
- 239000011253 protective coating Substances 0.000 claims abstract description 20
- 230000000694 effects Effects 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims description 20
- 239000002184 metal Substances 0.000 claims description 20
- 239000011324 bead Substances 0.000 claims description 14
- 239000011521 glass Substances 0.000 claims description 14
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 11
- 239000010936 titanium Substances 0.000 claims description 10
- 229910052719 titanium Inorganic materials 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 238000003618 dip coating Methods 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 11
- 239000011247 coating layer Substances 0.000 description 24
- 230000004907 flux Effects 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 238000005247 gettering Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- -1 iron or titanium Chemical compound 0.000 description 1
- 150000002730 mercury Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000006254 rheological additive Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 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
- H01J61/28—Means for producing, introducing, or replenishing gas or vapour during operation of the lamp
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
- H01J61/18—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent
- H01J61/20—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent mercury vapour
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
- H01J61/72—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury
Definitions
- the invention relates to a source of mercury for a low-pressure discharge lamp according to the preamble of claim 1, a low-pressure discharge lamp with such a source of mercury and a method for producing a source of mercury.
- Amalgams for low-pressure discharge lamps in spherical form are known from the prior art, which are placed in a pump tube.
- the opening from the exhaust tube to the discharge vessel should be relatively small, in order to avoid the escape of amalgam into the discharge vessel, since the functionality of the amalgam would be severely impaired because, according to experience, its temperature in the discharge vessel would be much too low.
- the opening at the pump stem is too small, no reliable pumping and filling of the low-pressure discharge lamp is guaranteed.
- a retaining body in the form of an iron disc or an iron ball is provided in the prior art, which prevents passage of the amalgam through the opening.
- FIG. 1 the discharge vessel 1 is shown, at the two end portions of which electrodes 2, 4 are located. At these electrodes are a respective start-up flag 6a, 6b and, adjacent to the filament of the electrode, a working amalgam 8 attached to a wire fixed to the glass bead of the electrode. The start-up flag and working amalgam must be attached separately to the electrode. In contrast to the amalgam in the pump stalk, however, the distance of the working amalgam 8 from the helix and thus its working temperature and vapor pressure in a wider range is adjustable.
- the vapor pressure curve of the amalgam can be adjusted over its chemical composition within a certain range.
- particularly advantageous conditions result when the mercury content is about 10 percent by weight. This means that with a mercury amount of 2.5 mg in the lamp on the amalgam carrier 25 mg of amalgam alloy must be applied. Since the A-malgamleg réelle during the manufacturing process of the lamp is usually liquid, it must adhere particularly well to the amalgam carrier, so as not to drip when shock. With regard to the requirements for the metal carrier and the application process of the amalgam alloy, therefore, there are special requirements that increase the manufacturing costs. Presentation of the invention
- the invention has for its object to provide a source of mercury whose production costs and their material costs are low, as well as a low-pressure discharge lamp with such a mercury source and to provide a method for producing such a source of mercury.
- an amalgam body is provided which is located on an end face of a wire or which is enclosed in a perforated structure. In this way, it is possible to use amalgam bodies with greater deviations in the geometric design in low-pressure discharge lamps.
- the manufacturing process is simple and the manufacturing costs are low.
- the amalgam body or the perforated structure has a protective coating, whereby leakage of liquid or semi-liquid amalgam from the amalgam body can be prevented.
- the protective coating in the working temperature range of the low-pressure discharge lamp has a gettering effect, in particular for hydrogen.
- hydrogen which is during operation of the low-pressure discharge lamp in the Plasma has formed from the plasma through the mercury source.
- the protective cover is preferably a metal that with
- Mercury does not form amalgam, preferably titanium. This allows a good diffusion behavior through the protective coating.
- the amalgam body is substantially spherical, since spherical amalgam alloys are the easiest to produce, as long as the roundness is not too great.
- the amalgam body is impaled on a wire, so that the manufacturing complexity for producing the mercury source is low.
- the amalgam body is enclosed in the perforated structure, which is preferably made of expanded metal.
- the perforated structure which is preferably made of expanded metal.
- the expanded metal may be connected via a fastening device with a glass bead provided adjacent to the electrode. This allows the device piercing reduce the expense of attaching the amalgam in the low-pressure discharge lamp.
- the fastening device is preferably designed like a comb.
- the distance of the working amalgam to the coil in a predefined manner is gradually adjustable.
- a fastening device for the mercury source is provided adjacent to the electrode.
- a desired temperature at the amalgam body is adjustable thereby.
- the low-pressure discharge lamp preferably has a glass bead on which the fastening device of the mercury source can be fastened. This eliminates further fastening devices for the amalgam body in the low-pressure discharge lamp.
- the mercury source is attached adjacent to the electrode in such a manner that a start amalgam body is closer to the electrode than a work amalgam body. As a result, the different temperature behavior of starting amalgam and working amalgam is taken into account.
- a wire and an amalgam body are provided, an end portion of the wire is introduced into the amalgam body, preferably in a heated state, and subsequently a protective cover is provided. train applied over the amalgam body.
- the protective coating is applied by dip coating, whereby the manufacturing cost is again lower.
- the protective coating is dried to easily convert the protective coating.
- a repeated dipping and drying process may be advantageous.
- the protective coating comprises titanium to provide a gettering effect for, for example, hydrogen.
- a perforated structure and an amalgam body are provided, the amalgam body is inserted into the opened perforated structure, the perforated structure is closed, and then a protective coating is applied to the perforated structure.
- the perforated structure preferably has expanded metal, so that the material costs can be kept low.
- the protective coating or the coating layer also prevents dripping of the amalgam during the manufacturing process of the lamp. In addition, the initially mentioned quantity restriction is canceled.
- FIG. 1 is a partial view of a prior art amalgam low-pressure discharge lamp
- FIG. 2 is a partial view of a discharge lamp in which a mercury source according to the present invention is usable.
- Fig. 5 is a mercury source according to the third embodiment of the invention.
- Fig. 6 is an illustration of the relative luminous flux versus the temperature for mercury sources according to the first and second embodiments. Preferred embodiment of the invention
- FIG. 2 shows a discharge vessel 10 in which mercury sources according to the present invention are applicable.
- electrodes 12, 14 are provided, which have a respective helix 16, 18.
- power supply wires 20a, 20b to a coil 16 of the electrode 12 and power supply wires 22a, 22b are inserted to a coil 18 of the electrode 14.
- the power supply wires 20a, 20b are electrically insulated by a glass bead 24, while the power supply wires 22a, 22b are connected by a glass bead 26 so that the orientation of the respective coil 16, 18 is maintained due to this isolated mechanical connection between the power supply wires.
- FIG. 3 shows a mercury source 30 according to the first embodiment.
- the mercury source 30 has a wire 32, to one end of which a substantially spherical working amalgam 34 is attached, which is provided with a coating layer 36.
- the coating layer preferably comprises titanium.
- Such a mercury source 30 is produced by first cutting a wire 32, preferably a material which does not form amalgam with mercury, such as iron or titanium, to the desired length and heating it at the end , Then, a work amalgam ball, as known in the art, is provided and one end of the heated wire 32 is inserted into the amalgam ball. After cooling and solidification, a phase of titanium powder, and a rheological additive, the starting material for the coating layer is preferably provided, and the amalgam ball on the wire is dip-coated with the coating layer. This is followed by a drying process.
- a wire 32 preferably a material which does not form amalgam with mercury, such as iron or titanium
- the process of dip coating and drying may be repeated a desired number of times.
- a mercury source 30 made in this manner is attached to at least one of the electrodes 12, 14.
- the mercury source 30 is positioned so that the work amalgam 34 is opposite to the coil 16 with respect to the glass bead 24, so that the free end portion of the wire 32 points in the direction of the coil 16.
- the distance between the work amalgam 34 and the helix 16 can be adjusted as desired, so that a desired temperature at the work amalgam 34 in the course of operation of the low-pressure discharge lamp is present.
- the manufacturing process can be simplified, and adjust the distance of Häamalgams the helix with high flexibility.
- the coating layer 36 further prevents semi-liquid working amalgam from dripping into the discharge vessel.
- the geometrical requirements for the ball-shaped work amalgam 34 are lower than in the prior art, so that the production of the work amalgam 34 is associated with lower costs.
- metal in powder form is preferably used.
- the determination of the metal for the coating layer also takes place under the aspect that the getter effect is present in the working temperature range of the amalgam.
- titanium has proven to be particularly advantageous.
- Low-pressure discharge lamps having a mercury source 30 according to the first embodiment of the present invention are not different in experiments with respect to the luminous flux temperature behavior of lamps in which the amalgam is applied to a metal substrate. Also, the mechanical stability of the mercury source 30 was sufficient to allow the amalgam to pass through the manufacturing process without damage.
- a starting amalgam preferably also with a coating layer, is applied to the end of the wire 32, which is opposite to the working amalgam 34.
- the starting amalgam to the coil, while the Häamalgam 34 is provided at a higher distance from the helix.
- the wire 32 is attached to the glass bead 24.
- a working amalgam may be provided on one wire and a starting amalgam on another wire with a respective coating layer.
- the starting amalgam and the work amalgam can be provided on the glass bead 24 at any distance from the helix within the discharge vessel at any angle of rotation.
- the relative luminous flux of the low-pressure discharge lamp can be adjusted by adjusting the distance between the starting amalgam and the working amalgam to the coil.
- FIG. 4 shows a mercury source 40 according to a second embodiment of the invention.
- This has a perforated structure 42 in which a work amalgam 44 is located.
- the perforated structure 42 preferably has a cube shape bounded by sidewalls 43 and may be opened to introduce the working amalgam 44 during manufacture at least at one end portion.
- the perforated structure 42 is preferably a stamped part, which is as shown in Fig. 4, is supplied and closed when the ball is pressed.
- expanded metal is preferred.
- the perforated structure 42 is connected via a holding portion 46 with a fastening portion 48, which is preferably comb-shaped.
- the perforated structure 42 has a coating layer 50 which may be made of the same material as the coating layer of the first embodiment. Opposite to the attachment portion 48, a tab 45 is provided on the perforated structure.
- the size of the working amalgam 44 is preferably smaller than the inner dimension of the perforated structure 42 to allow for a loose introduction of the working amalgam 44 into the perforated structure 42 in the manufacturing process.
- the coating layer 50 is preferably made by dip coating, wherein prior to the dip coating, the working amalgam 44 is introduced into the perforated structure 42 and the perforated structure is closed.
- the dip coating and subsequent drying may be provided once or a plurality of times to provide a layer of desired thickness and material composition to the perforated structure.
- FIG. 5 shows a mercury source 60 according to the third embodiment of the invention.
- This mercury source 60 has a perforated structure 42, a working amalgam 44, a holding portion 46, a fixing portion 48 and a coating layer 50 in the same manner as in the mercury source 40 of the second embodiment.
- the attachment portion 48 is provided between the holding portion 46 and a perforated structure 62 in the third embodiment, in which a starting amalgam 64, preferably in spherical shape, is located.
- the perforated structure 62 for the starting amalgam 64 like the perforated structure 42, is preferably formed as an expanded metal and has a coating layer 66, also preferably with titanium.
- the work amalgam 44 is introduced into the perforated structure 42 and the start amalgam 64 is introduced into the perforated structure 62 and subsequently the coating layers 50 and 66 are applied to the perforated structures 42, 62.
- the mercury source 60 is attached to the electrode 12 by attaching the attachment portion 48 to the glass bead 24 so that the start amalgam 64 is provided adjacent to the coil. In this way, it is possible to achieve an increased temperature at the starting amalgam 64 in comparison to the working amalgam 44, so that a rapid increase of the luminous flux when switching on is made possible.
- the relative luminous flux is above the temperature for a source of mercury corresponding to the first one
- the starting amalgam 64 is applied to an expanded metal surface and the coating layer is provided on the starting amalgam.
- the smaller amount of necessary starting amalgam is taken into account in comparison to the amount of working amalgam and a cost-effective variant is selected for the production of the starting amalgam 64.
- a source of mercury for a low-pressure discharge lamp having an amalgam body which is located on an end face of a wire or which is enclosed in a perforated structure. It is preferred that the amalgam body or perforated structure having a gettering protective coating be coated. With the present invention, a simple manufacturing process with low material costs can be implemented. LIST OF REFERENCE NUMBERS
Landscapes
- Discharge Lamp (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006052025A DE102006052025A1 (de) | 2006-11-03 | 2006-11-03 | Quecksilberquelle |
| PCT/EP2007/061237 WO2008052895A2 (de) | 2006-11-03 | 2007-10-19 | Quecksilberquelle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2054918A2 true EP2054918A2 (de) | 2009-05-06 |
Family
ID=39264858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07821601A Withdrawn EP2054918A2 (de) | 2006-11-03 | 2007-10-19 | Quecksilberquelle |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7952286B2 (de) |
| EP (1) | EP2054918A2 (de) |
| CN (1) | CN101517692B (de) |
| DE (1) | DE102006052025A1 (de) |
| WO (1) | WO2008052895A2 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109314366A (zh) * | 2016-07-22 | 2019-02-05 | 极光先进雷射株式会社 | 窄带化KrF准分子激光装置 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8101885A (nl) | 1981-04-16 | 1982-11-16 | Philips Nv | Werkwijze voor het vervaardigen van een lagedrukkwikdampontladingslamp en lagedrukkwikdampontladingslamp vervaardigd met die werkwijze. |
| JPS6171540A (ja) | 1984-09-17 | 1986-04-12 | Toshiba Corp | けい光ランプ装置 |
| US5598069A (en) * | 1993-09-30 | 1997-01-28 | Diablo Research Corporation | Amalgam system for electrodeless discharge lamp |
| US5500567A (en) | 1994-02-10 | 1996-03-19 | General Electric Company | Apparatus for securing an amalgam at the apex of an electrodeless fluorescent lamp |
| US5847508A (en) | 1994-10-03 | 1998-12-08 | General Electric Company | Integrated starting and running amalgam assembly for an electrodeless fluorescent lamp |
| DE4445532A1 (de) | 1994-12-20 | 1996-06-27 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Niederdruckentladungslampe |
| KR20010022019A (ko) | 1998-05-22 | 2001-03-15 | 롤페스 요하네스 게라투스 알베르투스 | 저압 수은 증기 방전 램프 |
| WO2002080224A2 (en) | 2001-03-29 | 2002-10-10 | Koninklijke Philips Electronics N.V. | Low/pressure mercury vapor discharge lamp |
-
2006
- 2006-11-03 DE DE102006052025A patent/DE102006052025A1/de not_active Ceased
-
2007
- 2007-10-19 CN CN2007800355223A patent/CN101517692B/zh not_active Expired - Fee Related
- 2007-10-19 EP EP07821601A patent/EP2054918A2/de not_active Withdrawn
- 2007-10-19 US US12/311,670 patent/US7952286B2/en not_active Expired - Fee Related
- 2007-10-19 WO PCT/EP2007/061237 patent/WO2008052895A2/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008052895A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101517692B (zh) | 2013-10-23 |
| WO2008052895A3 (de) | 2008-12-24 |
| WO2008052895A2 (de) | 2008-05-08 |
| US20090278456A1 (en) | 2009-11-12 |
| CN101517692A (zh) | 2009-08-26 |
| US7952286B2 (en) | 2011-05-31 |
| DE102006052025A1 (de) | 2008-05-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| 17P | Request for examination filed |
Effective date: 20090311 |
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| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL BA HR MK RS |
|
| RBV | Designated contracting states (corrected) |
Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR |
|
| DAX | Request for extension of the european patent (deleted) | ||
| RBV | Designated contracting states (corrected) |
Designated state(s): DE FR GB HU IT |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: OSRAM AG |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: OSRAM GMBH |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: OSRAM GMBH |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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| 18D | Application deemed to be withdrawn |
Effective date: 20160503 |