WO1999000825A1 - Plugging structure for vessels - Google Patents
Plugging structure for vessels Download PDFInfo
- Publication number
- WO1999000825A1 WO1999000825A1 PCT/JP1998/002760 JP9802760W WO9900825A1 WO 1999000825 A1 WO1999000825 A1 WO 1999000825A1 JP 9802760 W JP9802760 W JP 9802760W WO 9900825 A1 WO9900825 A1 WO 9900825A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- conductive
- electrode core
- core rod
- hole
- tube
- 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.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
- H01J61/366—Seals for leading-in conductors
-
- 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
- H01J61/361—Seals between parts of vessel
- H01J61/363—End-disc seals or plug seals
Definitions
- the present invention relates to a structure for closing various tubes such as a mercury lamp, a metal halide lamp, and a halogen lamp.
- a functionally graded material has begun to be used for a plug of a discharge lamp in which a pair of electrodes are arranged opposite to each other in a silica glass arc tube.
- one side is rich in non-conductive components such as silicon, and the proportion of a conductive component such as molybdenum increases continuously or stepwise toward the other side. Therefore, in the case of an obstruction made of silicide and molybdenum, one end is non-conductive and the coefficient of thermal expansion is almost equal to the coefficient of thermal expansion of the silicic glass, which is the arc tube material.
- the portion is electrically conductive and has a characteristic that the coefficient of thermal expansion is close to the coefficient of thermal expansion of evening stainless steel, which is the material of the electrode core rod. Such characteristics are suitable as a closing body for a discharge lamp.
- such a closed body can be used not only in a discharge lamp but also in a halogen lamp having a filament (halogen heater).
- the closed body using such a functionally gradient material is composed of a non-conductive component such as silica and a conductive component such as molybdenum
- an electrode core made of a metal such as tungsten has a non-conductive component. If it comes into direct contact, cracks may occur in the plug due to differences in the coefficient of thermal expansion, and after the lamp is manufactured, these cracks will spread and lead to accidents such as breakage.
- the present invention provides the following closed structure for a tube (hereinafter, also referred to as a closed body).
- the electrode core rod is shrink-fitted into the hole of the functionally gradient material without any gap, and at least a part of the surface of the electrode core rod located in the hole of the functionally gradient material is a thin film of a high melting point metal. It is characterized by being coated.
- the refractory metal is tungsten or molybdenum.
- FIG. 1 shows a discharge lamp using the closure of the present invention.
- FIG. 2 shows the closure according to the invention.
- FIG. 1 shows a discharge lamp using the closed body of the present invention.
- the arc tube 2 and the side tube 3 of the lamp 1 are made of silica glass.
- the closing body 6 is a columnar body made of silica and molybdenum.
- One side of the closing body 6 (the inside of the arc tube) is rich in silica and is non-conductive, and the other side (the outside of the arc tube) is Rich in molybdenum and conductive.
- the non-conductive I side end faces the discharge space, and the side tubes 3 formed at both ends of the arc tube 2 are hermetically welded in the silica-rich region (non-conductive region) of the closure 6.
- You. Symbol 8 is an external lead.
- FIG. 2 shows a sectional view of the closing body of the present invention.
- the closing body 6 is a functionally gradient material composed of silica and molybdenum, and is manufactured by a wet method or a press method.
- a mixed slurry is obtained using silica powder and molybdenum powder having different particle size distributions, the mixed slurry is centrifuged or sedimented, and then the mud after removing the solvent is dehydrated, dried, and cooled. It is a method of making by hydraulic molding or the like, and it is a manufacturing method that can obtain a very gentle composition change in the length direction of the functionally gradient material.
- the pressing method a plurality of mixed powders having different mixing ratios of the sily powder and the molybdenum powder are prepared, and the mixed powders are wet-mixed with a solvent containing an organic binder, and then dried and formed.
- a granulated powder is prepared, and the granulated powder is filled into a mold in a plurality of layers in the order of mixing ratio, pressed to obtain a molded body, and then the molded body is heated to remove the organic binder from the molded body, and then fired. It is a method of doing.
- the functionally graded material manufactured by the method described above is formed into a columnar shape of a predetermined size to be accommodated in the side tube portion of the tube, and is subjected to preliminary sintering. Then, a hole having substantially the same diameter as that of the electrode core rod is formed in the conductive region.
- a thin film 9 of a high melting point metal is formed on the surface of the electrode core rod having an electrode at the tip.
- the thin film of the high melting point metal is formed by a vacuum evaporation method or a sputtering method.
- the refractory metal must be a material having a melting point higher than the main sintering temperature of the functionally graded material.
- molybdenum-tungsten has a high melting point and is suitable for thin films on the surface of electrode rods without melting, scattering, alloying, etc. occurring at the sintering temperature of the functionally graded material.
- the thin film After a thin film of a high melting point metal is formed on the surface of the electrode core rod, the thin film is inserted into the calcined body, and sintered and fixed. Since the bonding strength of the thin film to the surface of the electrode rod is weak, the coefficient of thermal expansion between the electrode rod and the metal component of at least 50 V 0 1% of the functionally graded material during main sintering is low. Even if the displacement occurs due to the difference, the constituent particles of the thin film slide on the surface of the electrode rod according to the contraction of the functionally gradient material. However, no distortion is caused by the deformation in the slipped portion, and no crack is generated on the surface of the region where the metal component is at least 50 V o 1% or less inside the functionally gradient material.
- the thin film formation region is a surface of the electrode core rod inserted into the closure of the functionally gradient material and inscribed in the closure, and inscribed at least in a region where the metal component is 50 vo 1% or less. If a thin film is formed on the surface region of the electrode core bar, the effects of the present invention can be obtained. Further, a thin film may be formed on the surface of the electrode rod outside the closing body. Further, since the hole of the closing body has substantially the same diameter as the electrode core rod and is shrink-fitted during sintering, no gap is formed between the hole and the electrode core rod. Therefore, the coldest part cannot be created here.
- the discharge lamp a metal halide lamp, a xenon lamp, and a mercury lamp can be applied, and the closed body of the present invention can be used even for an incandescent lamp such as a halogen lamp or a halogen lamp.
- the hole of the closing body made of the functionally graded material has been described as a hole having one end closed.
- the electrode core rod is fixed by penetrating the closing body. It goes without saying that the present invention can be applied to a through hole.
- the diameter of the closing body 6 is 3.0 mm, and is a functionally graded material made of silica and molybdenum produced by a press method.
- the molybdenum concentration at both ends of the functionally graded material is 0 V o 1% on the non-conductive side and 80 v o 1% on the conductive side.
- the electrodes 4 and 5 are made of tungsten, and the electrode rod 7 is integrally formed with the electrodes 4 and 5 and is made of tungsten and has a diameter of 0.5 mm.
- the power consumption is 150 W.
- the contents of the enclosure are 19 mg of mercury, 0.4 mg of dysprosium iodide monocesium neodymium cesium iodide, and 0.25 mg of indium bromide.
- the refractory metal thin film was a tungsten thin film.
- the thin film forming method include a vacuum deposition method, a sputtering method, and a coating method in which fine particles of a high melting point metal are mixed in a solvent, coated and dried, but the sputtering method is accompanied by an increase in the size of the apparatus. Since the coating method is difficult to control the film thickness, the apparatus is small in size and the inexpensive vacuum evaporation method is adopted in this embodiment.
- the formed tungsten film thickness was about 1 m.
- the lamp of the present invention that is, the one in which the electrode core rod was coated with the high melting point thin film
- the conventional lamp that is, the one in which the electrode core rod was not coated with the high melting point thin film.
- the number of lamps used was 5 for each of the lamps of the present invention and the conventional lamp, and the lighting conditions were horizontal lighting in a repeated cycle of lighting for 45 minutes in air and lighting off for 15 minutes.
- the non-conductive region of the functionally gradient material and the electrode core rod come into contact with each other through the thin film of the high melting point metal, so that the metal thin film on the surface of the electrode core slides during sintering. Since the shrinkage strain is reduced, cracks do not occur and a good tube can be obtained. Furthermore, since there is almost no gap between the hole of the closing member and the electrode core rod, when the present invention is applied to a discharge lamp, condensation of the filling in the discharge lamp can be prevented.
- the closed part structure (closed body) of the present invention can be suitably used for a hermetic sealing structure of a discharge lamp such as a metal halide lamp or a mercury lamp, or an incandescent lamp such as a halogen lamp.
- a discharge lamp such as a metal halide lamp or a mercury lamp
- an incandescent lamp such as a halogen lamp.
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP98928602A EP0923108B1 (en) | 1997-06-30 | 1998-06-22 | Sealing part arrangement of a tube lamp |
| US09/142,180 US6107740A (en) | 1997-06-30 | 1998-06-22 | Plugging structure for vessels |
| DE69829631T DE69829631T2 (de) | 1997-06-30 | 1998-06-22 | Abdichtungsanordnung einer Röhrenlampe |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18715797A JP3993667B2 (ja) | 1997-06-30 | 1997-06-30 | 管球の閉塞部構造体 |
| JP9/187157 | 1997-06-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1999000825A1 true WO1999000825A1 (en) | 1999-01-07 |
Family
ID=16201133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1998/002760 Ceased WO1999000825A1 (en) | 1997-06-30 | 1998-06-22 | Plugging structure for vessels |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6107740A (ja) |
| EP (1) | EP0923108B1 (ja) |
| JP (1) | JP3993667B2 (ja) |
| DE (1) | DE69829631T2 (ja) |
| WO (1) | WO1999000825A1 (ja) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3736710B2 (ja) * | 1997-09-08 | 2006-01-18 | ウシオ電機株式会社 | 管球用電気導入体 |
| EP1001453B1 (en) * | 1998-03-05 | 2004-09-22 | Ushio Denki Kabushiki Kaisya | Electricity lead-in body for bulb and method for manufacturing the same |
| JP3118758B2 (ja) * | 1998-10-19 | 2000-12-18 | ウシオ電機株式会社 | ランプ用傾斜機能材料製封止体およびランプ |
| JP3591439B2 (ja) * | 2000-09-21 | 2004-11-17 | ウシオ電機株式会社 | ショートアーク放電ランプ |
| US6837417B2 (en) * | 2002-09-19 | 2005-01-04 | Siemens Westinghouse Power Corporation | Method of sealing a hollow cast member |
| JP2005285676A (ja) * | 2004-03-30 | 2005-10-13 | Nippon Tungsten Co Ltd | 放電灯用電極 |
| US20060001346A1 (en) * | 2004-06-30 | 2006-01-05 | Vartuli James S | System and method for design of projector lamp |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05334997A (ja) * | 1992-05-29 | 1993-12-17 | Iwasaki Electric Co Ltd | 金属蒸気放電灯 |
| WO1994006947A1 (en) * | 1992-09-24 | 1994-03-31 | Toto Ltd. | Functionally gradient material and method of manufacturing same |
| JPH09115484A (ja) * | 1995-10-18 | 1997-05-02 | Toto Ltd | 放電灯の封止部構造および封止用キャップの製造方法 |
| JPH09125186A (ja) * | 1995-10-30 | 1997-05-13 | Toto Ltd | 傾斜機能材料、傾斜機能材料を用いた放電灯の封止部材及び傾斜機能材料の製造方法 |
| JPH1040868A (ja) * | 1996-07-25 | 1998-02-13 | Ushio Inc | 放電ランプ |
| JPH1040867A (ja) * | 1996-07-25 | 1998-02-13 | Ushio Inc | 放電ランプ |
| JPH1040869A (ja) * | 1996-07-25 | 1998-02-13 | Ushio Inc | 光照射装置 |
| JPH10125284A (ja) * | 1996-10-18 | 1998-05-15 | Toto Ltd | 発光管の封止部構造及び封止部用キャップの製造方法 |
| JPH10172514A (ja) * | 1996-12-12 | 1998-06-26 | Toto Ltd | ランプ |
| JPH10188897A (ja) * | 1996-12-26 | 1998-07-21 | Ushio Inc | 高圧放電ランプ |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2150433T3 (es) * | 1992-09-08 | 2000-12-01 | Koninkl Philips Electronics Nv | Lampara de descarga de alta presion. |
-
1997
- 1997-06-30 JP JP18715797A patent/JP3993667B2/ja not_active Expired - Lifetime
-
1998
- 1998-06-22 US US09/142,180 patent/US6107740A/en not_active Expired - Lifetime
- 1998-06-22 EP EP98928602A patent/EP0923108B1/en not_active Expired - Lifetime
- 1998-06-22 DE DE69829631T patent/DE69829631T2/de not_active Expired - Lifetime
- 1998-06-22 WO PCT/JP1998/002760 patent/WO1999000825A1/ja not_active Ceased
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05334997A (ja) * | 1992-05-29 | 1993-12-17 | Iwasaki Electric Co Ltd | 金属蒸気放電灯 |
| WO1994006947A1 (en) * | 1992-09-24 | 1994-03-31 | Toto Ltd. | Functionally gradient material and method of manufacturing same |
| JPH09115484A (ja) * | 1995-10-18 | 1997-05-02 | Toto Ltd | 放電灯の封止部構造および封止用キャップの製造方法 |
| JPH09125186A (ja) * | 1995-10-30 | 1997-05-13 | Toto Ltd | 傾斜機能材料、傾斜機能材料を用いた放電灯の封止部材及び傾斜機能材料の製造方法 |
| JPH1040868A (ja) * | 1996-07-25 | 1998-02-13 | Ushio Inc | 放電ランプ |
| JPH1040867A (ja) * | 1996-07-25 | 1998-02-13 | Ushio Inc | 放電ランプ |
| JPH1040869A (ja) * | 1996-07-25 | 1998-02-13 | Ushio Inc | 光照射装置 |
| JPH10125284A (ja) * | 1996-10-18 | 1998-05-15 | Toto Ltd | 発光管の封止部構造及び封止部用キャップの製造方法 |
| JPH10172514A (ja) * | 1996-12-12 | 1998-06-26 | Toto Ltd | ランプ |
| JPH10188897A (ja) * | 1996-12-26 | 1998-07-21 | Ushio Inc | 高圧放電ランプ |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP0923108A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69829631T2 (de) | 2006-03-09 |
| JP3993667B2 (ja) | 2007-10-17 |
| US6107740A (en) | 2000-08-22 |
| JPH1125915A (ja) | 1999-01-29 |
| EP0923108B1 (en) | 2005-04-06 |
| EP0923108A4 (en) | 2000-03-01 |
| DE69829631D1 (de) | 2005-05-12 |
| EP0923108A1 (en) | 1999-06-16 |
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