CN100361266C - Single crystal alumina ceramic high-intensity gas discharge lamp tube - Google Patents
Single crystal alumina ceramic high-intensity gas discharge lamp tube Download PDFInfo
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- CN100361266C CN100361266C CNB031582168A CN03158216A CN100361266C CN 100361266 C CN100361266 C CN 100361266C CN B031582168 A CNB031582168 A CN B031582168A CN 03158216 A CN03158216 A CN 03158216A CN 100361266 C CN100361266 C CN 100361266C
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- crystal alumina
- tube
- alumina porcelain
- signle crystal
- bar
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Abstract
The present invention relates to a single crystal alumina ceramic high-intensity gas discharge lamp tube. When the lamp is in the state of being used, the sealing position of single crystal alumina ceramic plugs, niobium-zirconium tubes and a single crystal alumina ceramic electric arc tube can not be directly received the thermal radiation from a high-temperature luminous zone. The lamp tube has long service life. The single crystal alumina ceramic high-intensity gas discharge lamp tube comprises that a single crystal alumina ceramic electric arc tube are provided, two ends of the lamp tube are enclosed by single crystal alumina ceramic plugs, and the centre of plugs are provided with holes; niobium-zirconium tubes respectively pass through the central holes of the plugs to connect with an electrode. The single crystal alumina ceramic plugs, the niobium-zirconium tubes and the single crystal alumina ceramic electric arc are respectively connected with the glass solder welding. The lamp tube is characterized in that the outside of the electrode is sheathed with a ceramic tube.
Description
(1) technical field
The present invention relates to the power for illumination fluorescent tube, be specially signle crystal alumina porcelain high-intensity gas discharge lamp pipe.
(2) background technology
Existing signle crystal alumina porcelain high-intensity gas discharge lamp pipe, it comprises vacuum-packed signle crystal alumina porcelain arc lamp tube, be filled with luminous agent and mercury argon or mercury xenon gaseous mixture in the fluorescent tube, the signle crystal alumina porcelain plug capping of the both ends of fluorescent tube, the center of this plug is porose, centre bore and electrode that nb-zr tube passes this plug respectively are welded to connect, and are welded to connect with glass solder respectively between this plug and nb-zr tube and the signle crystal alumina porcelain arc lamp tube.The nb-zr tube at arc lamp tube two ends is connected power supply, pass to 3000 volts to 5000 deep-sited pulses towards voltage, temperature uprises in the electrode discharge, arc lamp tube, luminous agent gasification and ionization form plasma gas, the plasma gas discharge, electrode conduction is luminous.The shortcoming of this lamp is exactly the thermal radiation that sealing-in position between closure plug and nb-zr tube and the signle crystal alumina porcelain arc lamp tube directly is subjected to the high temperature luminous zone, plasma gas produces the heat chemistry corrosion to the used glass solder in sealing-in position under the condition of high temperature, corrosion reaction takes place, cause sealing to reduce, plasma gas in the fluorescent tube is easy to leak, and influences the useful life of fluorescent tube.Again because the coefficient of expansion of nb-zr tube and signle crystal alumina porcelain plug and arc lamp tube is different, the thermal stress that different medium causes under hot conditions makes the sealing-in position produce micro-crack easily, cause the plasma gas in the fluorescent tube to leak, also have influence on the useful life of fluorescent tube.
(3) summary of the invention
At existing signle crystal alumina porcelain high-intensity gas discharge lamp pipe, sealing-in position between its signle crystal alumina porcelain plug and nb-zr tube and the signle crystal alumina porcelain arc lamp tube directly is subjected to the thermal radiation of high temperature luminous zone, easy and the sealing-in position used glass solder generation corrosion reaction of plasma gas in the arc lamp tube, the sealing-in position easily produces micro-crack, the shortcoming that its useful life is short.The invention provides another signle crystal alumina porcelain high-intensity gas discharge lamp pipe, its sealing-in position and high temperature luminous zone are isolated, the temperature at sealing-in position reduces, the micro-crack that can avoid the glass solder generation corrosion reaction at sealing-in position and high temperature stress and cause, plasma gas in the fluorescent tube is difficult for leaking, and the useful life of fluorescent tube is longer.
Technical scheme of the present invention is such: it comprises vacuum-packed signle crystal alumina porcelain arc lamp tube, be filled with luminous agent and mercury argon or mercury xenon gaseous mixture in the fluorescent tube, two end closures of fluorescent tube have signle crystal alumina porcelain plug, the center of described signle crystal alumina porcelain plug is porose respectively, the centre bore that nb-zr tube passes described signle crystal alumina porcelain plug respectively is connected with electrode, be welded to connect with glass solder respectively between described signle crystal alumina porcelain plug and nb-zr tube and the signle crystal alumina porcelain arc lamp tube, it is characterized in that, be connected to earthenware in the outer cover load of electrode.
It is further characterized in that described earthenware is the conductivity ceramics pipe; Described earthenware also can be the conventional ceramic pipe; Described signle crystal alumina porcelain is mixed with a kind of in cerium oxide, titanium oxide and the magnesium oxide at least; Described electrode is welded to connect by molybdenum bar and tungsten bar and constitutes, and the other end and the nb-zr tube of molybdenum bar are welded to connect, and thoriatde-tungsten wire is twined in the end of the tungsten bar other end; Described electrode is welded to connect by molybdenum bar and tungsten bar and constitutes, and the other end and the nb-zr tube of molybdenum bar are welded to connect, and tungsten filament is twined in the end of the tungsten bar other end; Described electrode is welded to connect by molybdenum bar and thorium tungsten bar and constitutes, and the other end and the nb-zr tube of molybdenum bar are welded to connect, and thoriatde-tungsten wire is twined in the end of the thorium tungsten bar other end; Described electrode is made of tungsten bar, and thoriatde-tungsten wire is twined in the end of the tungsten bar other end; Described electrode is made of the thorium tungsten bar, and tungsten filament is twined in the end of the thorium tungsten bar other end; Described electrode is made of the thorium tungsten bar, and thoriatde-tungsten wire is twined in the end of the thorium tungsten bar other end.
The present invention adopts after the said structure, the sealing-in position is separated with earthenware between changing into by original direct heat radiation that is subjected to luminous high-temperature region, the temperature at sealing-in position is by original 700 ℃ to 900 ℃, and reduce to present below 500 ℃, because plasma gas is the exponential increasing relation to the heat chemistry corrosion rate and the temperature at sealing-in position,, obviously increase earthenware and can reduce the heat chemistry corrosion of plasma gas significantly than 250 ℃ to 400 ℃ high more than 3 to 4 times 750 ℃ to 800 ℃ hot corrosion speed the sealing-in position.Parallel optical axis is drawn materials and single crystal alumina oxide procelain arc tube and its coefficient of expansion of closure plug of making are 8.9 * 10 between 700 ℃ to 900 ℃
-5/ ℃, and the coefficient of expansion of nb-zr tube is 7.8 * 10
-4/ ℃; And between 250 ℃ to 400 ℃, parallel optical axis is drawn materials and its coefficient of expansion of electric arc tube, closure plug and nb-zr tube of making is respectively 7 * 10
-5/ ℃, 2.74 * 10
-4/ ℃, obviously as can be seen, because the reduction of temperature, the latter's the coefficient of expansion and the former difference are much smaller, since nb-zr tube and signle crystal alumina porcelain plug or with electric arc tube between the amassing of temperature gap at two ends of the difference of the stress that produces and the coefficient of expansion of two kinds of materials and stressed zone be directly proportional, when the temperature at the sealing-in position of luminous tube is reduced to below 500 ℃ by 700 ℃ to 900 ℃ like this, the heat stress value from signle crystal alumina porcelain plug and electric arc tube and nb-zr tube that weld interface bore at sealing-in position reduces significantly, weld interface is being difficult for forming micro-crack under the thermal shock effect repeatedly, plasma gas in the signle crystal alumina porcelain plug electric arc tube is difficult for leaking, and grow 1 to 2 times than the lamp of existing model of the same race the useful life of fluorescent tube.
(4) description of drawings
Fig. 1 is the cutaway view of front view of the present invention;
Fig. 2 is applied to the cutaway view of automobile master headlight for the present invention;
Fig. 3 is applied to the cutaway view of projection lamp for the present invention;
Fig. 4 is applied to the schematic diagram of high-pressure sodium lamp for the present invention.
(5) embodiment
See that Fig. 1 the present invention includes vacuum-packed signle crystal alumina porcelain arc lamp tube 3, filling luminous agent in the fluorescent tube 3, the both ends of fluorescent tube 3 are packaged with signle crystal alumina porcelain plug 2 respectively, the center of signle crystal alumina porcelain plug 2 is porose respectively, centre bore and electrode that nb- zr tube 1 and 8 passes signle crystal alumina porcelain plug 2 respectively are welded to connect, electrode is formed by connecting by molybdenum bar 7 and tungsten bar 5 butt-joints, thoriatde-tungsten wire is twined in the end of tungsten bar 5, electrode also can be made of a tungsten bar 5 separately, thoriatde-tungsten wire is twined in the end of tungsten bar 5, needs according to different lamps, the also available thorium tungsten bar of its tungsten bar substitutes in above-mentioned two kinds of structures of electrode, all can twine tungsten filament or thoriatde-tungsten wire on tungsten bar and the thorium tungsten bar, also can not twine.Signle crystal alumina porcelain plug 2 is welded to connect with glass solder respectively and between signle crystal alumina porcelain arc lamp tube 3 and the nb- zr tube 1,8, and signle crystal alumina porcelain plug 2 and arc lamp tube 3 used signle crystal alumina porcelain are mixed with a kind of in cerium oxide, titanium oxide and the magnesium oxide at least; Be with earthenware 6 in the outside of electrode, according to the needs of different lamps, earthenware 6 can be the conventional ceramic pipe, also can be the conductivity ceramics pipe.Conventional ceramic pipe majority is used in high-pressure sodium lamp, the metal halide lamp of high and medium power, its manufacture craft has following three kinds substantially: first, a kind of-fabricated from sapphire with the signle crystal alumina porcelain, its production technology belongs to prior art, and detailed content is seen patent of invention ZL971071578, ZL90105983.8.The second, adopting the translucent alumina porcelain is that PCA makes, and technology is same as the production technology of the ceramic plug that generally uses in the sodium vapor lamp.The 3rd, adopt the general manufacture craft of purity 99% alumina ceramic, promptly the alumina ceramic powder is hot-forming with particular manufacturing craft, sintering 18 to 24 hours in the ceramic post sintering high temperature furnace then, sintering temperature is 1680 ℃ to 1800 ℃.More than in three kinds of methods, first and the third cost higher, second kind is best.The conductivity ceramics pipe mainly is used in the metal halide lamp of ultrahigh pressure mercury lamp, middle low power and automobile master headlight, projection lamp, and its material composition is high purity aluminium oxide powder and pure molybdenum powder, ratio 1: 1,1: 2,1: 3 all can, the powder degree is less than 200 orders.When making the conductivity ceramics pipe, can with electrode place the compacting particular manufacturing craft in the middle of, with high purity aluminium oxide powder and pure molybdenum powder in blender mixed evenly after, with particular manufacturing craft in forcing press with 2 tons/square centimeter to 6 tons/square centimeter compaction mouldings of pressure, then blank is put into inherent 1800 ℃ to the 1900 ℃ insulations of high-temperature vacuum furnace or logical hydrogen high temperature furnace 8 to 12 hours, can burn till, carry out length by dimensional requirement then and cylindrical is worked into given size.When making conductivity ceramics, also can directly suppress compacting, sintering on the particular manufacturing craft without electrode, its technology is the same.In the end of earthenware 6 and contact site niobium silk 4 spot welding of electrode, there is 0.02 millimeter in earthenware 6 on the outer cover of the electrode that is connected and composed by molybdenum bar 7 and tungsten bar 5 butt-joints to 0.05 mm clearance between earthenware 6 and the electric arc tube 3; The other end of molybdenum bar 7 stretches into nb- zr tube 1,8 respectively, both place in the electron beam welding stove, molybdenum bar 7 is welded with nb- zr tube 1,8 respectively, signle crystal alumina porcelain plug 2 is stretched into the two ends of single crystal alumina oxide procelain arc tube 3 respectively, nb- zr tube 1,8 stretches into respectively in the centre bore of signle crystal alumina porcelain plug 2, is welded to connect with glass solder respectively between signle crystal alumina porcelain plug 2 and nb- zr tube 1,8 and electric arc tube 3.Owing to have the gap between earthenware and the electric arc tube, part mercury argon or the mercury xenon gaseous mixture arcuate segments that will enter earthenware like this, outside at signle crystal alumina porcelain arc lamp tube, arcuate segments position spary electrically-conducting paint above the earthenware 6 of corresponding one end, its Main Ingredients and Appearance is a carbon, smoked clothing oil, the platinum powder, electrically-conducting paint is electrically connected with the electrode outlet line of the arc lamp tube other end, nb-zr tube 1, behind the 8 connection power supplys, the position of corresponding brushing electrically-conducting paint, there is voltage between the outer wall of electrode and arc lamp tube, because the distance between earthenware arcuate segments position and the arc lamp tube outer wall is short, the easy ionization of mercury argon or mercury xenon gaseous mixture produces electronics under this voltage, and electronics enters the luminous zone, and electrode conduction begins luminous, here electrically-conducting paint is equivalent to an auxiliary electrode, is convenient to fluorescent tube conducting under voltage state on the low side.The fluorescent tube majority of brushing electrically-conducting paint is used in projection lamp.
See Fig. 2, nb-zr tube 1 of the present invention be connected with lead-out wire electrode 10 on being installed in working of plastics 11 by connecting line 9 that nb-zr tube 8 is connected with the extraction electrode 12 that passes working of plastics 11.Wherein arc lamp tube 3 employing internal diameters are 3.5 millimeters to 6 millimeters, length is 40 millimeters to 60 millimeters, wall thickness is that the signle crystal alumina porcelain tube of polishing inside and outside 0.8 millimeter to 1.2 millimeters is made, electrode spacing is 1.5 millimeters to 2.5 millimeters, the diameter of electrode is 0.5 millimeter to 1.2 bold and unconstrained meters, because the size of lamp is little, so above the tungsten bar 5 not around tungsten filament, earthenware 6 adopts the conductivity ceramics pipe, its material is: high purity aluminium oxide powder and pure molybdenum powder, ratio is 1: 1,1: 2, all can at 1: 3, the conductivity ceramics length of tube is between 19 millimeters to 25 millimeters, its internal diameter is bigger 0.02 millimeter to 0.03 millimeter than the electrode that is connected and composed by molybdenum bar 7 and tungsten bar 5 butt-joints, through littler 0.02 millimeter to 0.05 millimeter than electric arc tube, filling contains NaI in the arc lamp tube 3 outward, ScI, HgI, ALI
3Luminous agent and mercury argon or mercury xenon gaseous mixture.Nb- zr tube 1,8 and tungsten bar 5, molybdenum bar 7 all adopt the market existing procucts, and smelting unit such as two factories as subordinate factory, Shanghai of northwest non-ferrous metal research institute all has sale, and this is uses automobile master headlight of the present invention.
See Fig. 3, the present invention is installed in the glass case 14 that the one end stretches out from the centre bore of case 14, the electrode outlet line of nb-zr tube 1 is connected with patch bay 13 on the glass case 14.Wherein the build-up tolerance of the size of arc lamp tube 3, conductivity ceramics pipe 6 and conductivity ceramics pipe 6 is suitable with automobile master headlight substantially, just electrode spacing is 0.9 millimeter to 1.3 millimeters, the wall thickness of fluorescent tube is 1.8 millimeters to 2.8 millimeters, twine thoriatde-tungsten wire 8 to 12 circles above the electrode, the diameter of thoriatde-tungsten wire is 0.18 millimeter to 0.35 millimeter, filling mercury luminous agent and mercury argon or mercury xenon gaseous mixture in its arc lamp tube 3.The outside of arc lamp tube, the arcuate segments position brushing electrically-conducting paint of the earthenware 6 of corresponding one end, electrically-conducting paint is electrically connected with the electrode outlet line of the other end of arc lamp tube, does not draw among Fig. 3.This is for using projection lamp of the present invention.
See Fig. 4, the present invention is installed in the outer tube 15 that nb- zr tube 1,8 is connection electrode lead-out wire 17,16 respectively, electrode outlet line 17,16 connects the outer lead electrode of the outside crown top of burner.Wherein adopting length in the arc lamp tube 3 is 100 millimeters to 160 millimeters, interior diameter is that 8 millimeters to 12 millimeters signle crystal alumina porcelain tube is made, filling Na-Hg luminous agent and mercury argon or mercury xenon gaseous mixture in the arc lamp tube 3, earthenware 6 adopts the conventional ceramic pipe, its length is between 4 millimeters to 18 millimeters, build-up tolerance between itself and electrode and the electric arc tube is suitable with top two kinds of lamps, its manufacture craft adopts any in three kinds of technologies of above-mentioned conventional ceramic pipe, 80 watts/centimetre to 110 watts/centimetre of arc loads, tungsten filament 8 to 12 circles are twined in the outside of tungsten bar 5, the diameter of tungsten filament is 0.18 millimeter to 0.35 millimeter.This is for using high-pressure sodium lamp of the present invention.
Claims (10)
1. signle crystal alumina porcelain high-intensity gas discharge lamp pipe, it comprises vacuum-packed signle crystal alumina porcelain arc lamp tube, be filled with luminous agent and mercury argon or mercury xenon gaseous mixture in the arc lamp tube, there is signle crystal alumina porcelain closure plug two ends of arc lamp tube, the center of described signle crystal alumina porcelain plug is porose, the centre bore that nb-zr tube passes described signle crystal alumina porcelain plug respectively is connected with electrode, be welded to connect with glass solder respectively between described signle crystal alumina porcelain plug and nb-zr tube and the signle crystal alumina porcelain arc lamp tube, it is characterized in that, be connected to earthenware in the outer cover load of electrode.
2. according to the described signle crystal alumina porcelain of claim 1 high-intensity gas discharge lamp pipe, it is characterized in that: described earthenware is the conductivity ceramics pipe.
3. according to the described signle crystal alumina porcelain of claim 1 high-intensity gas discharge lamp pipe, it is characterized in that: described earthenware is the conventional ceramic pipe.
4. according to the described signle crystal alumina porcelain of claim 1 high-intensity gas discharge lamp pipe, it is characterized in that: the employed signle crystal alumina porcelain of described arc lamp tube and closure plug is mixed with a kind of in titanium oxide, cerium oxide and the magnesium oxide at least.
5. according to the described signle crystal alumina porcelain of claim 1 high-intensity gas discharge lamp pipe, it is characterized in that described electrode is welded to connect by molybdenum bar and tungsten bar to constitute, the other end and the nb-zr tube of molybdenum bar are welded to connect, and thoriatde-tungsten wire is twined in the end of the tungsten bar other end.
6. according to the described signle crystal alumina porcelain of claim 1 high-intensity gas discharge lamp pipe, it is characterized in that described electrode is welded to connect by molybdenum bar and tungsten bar to constitute, the other end and the nb-zr tube of molybdenum bar are welded to connect, and tungsten filament is twined in the end of the tungsten bar other end.
7. according to the described signle crystal alumina porcelain of claim 1 high-intensity gas discharge lamp pipe, it is characterized in that described electrode is welded to connect by molybdenum bar and thorium tungsten bar to constitute, the other end and the nb-zr tube of molybdenum bar are welded to connect, and thoriatde-tungsten wire is twined in the end of the thorium tungsten bar other end.
8. according to the described signle crystal alumina porcelain of claim 1 high-intensity gas discharge lamp pipe, it is characterized in that described electrode is made of tungsten bar, thoriatde-tungsten wire is twined in the end of the tungsten bar other end.
9. according to the described signle crystal alumina porcelain of claim 1 high-intensity gas discharge lamp pipe, it is characterized in that described electrode is made of the thorium tungsten bar, tungsten filament is twined in the end of the thorium tungsten bar other end.
10. according to the described signle crystal alumina porcelain of claim 1 high-intensity gas discharge lamp pipe, it is characterized in that described electrode is made of the thorium tungsten bar, thoriatde-tungsten wire is twined in the end of the thorium tungsten bar other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031582168A CN100361266C (en) | 2003-09-11 | 2003-09-11 | Single crystal alumina ceramic high-intensity gas discharge lamp tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031582168A CN100361266C (en) | 2003-09-11 | 2003-09-11 | Single crystal alumina ceramic high-intensity gas discharge lamp tube |
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| Publication Number | Publication Date |
|---|---|
| CN1595601A CN1595601A (en) | 2005-03-16 |
| CN100361266C true CN100361266C (en) | 2008-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031582168A Expired - Fee Related CN100361266C (en) | 2003-09-11 | 2003-09-11 | Single crystal alumina ceramic high-intensity gas discharge lamp tube |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101017764B (en) * | 2007-03-06 | 2010-08-04 | 王凯 | Making technology of ceramic metal halid light electrode component |
| CN101882558A (en) * | 2010-06-07 | 2010-11-10 | 高鞫 | Ceramic projection lamp |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06290752A (en) * | 1993-03-31 | 1994-10-18 | Toshiba Lighting & Technol Corp | High pressure sodium lamp and luminaire |
| JPH07122236A (en) * | 1993-10-21 | 1995-05-12 | Japan Storage Battery Co Ltd | High pressure sodium lamp |
| CN2404212Y (en) * | 1999-12-16 | 2000-11-01 | 王平 | Lead-out tube of high-voltage sodium lamp |
| CN1321328A (en) * | 1999-08-31 | 2001-11-07 | 皇家菲利浦电子有限公司 | Metal halide lamp |
| CN2687833Y (en) * | 2003-09-11 | 2005-03-23 | 俞鹤庆 | Single-crystal alumina ceramic high-strength gas discharge camp tube |
-
2003
- 2003-09-11 CN CNB031582168A patent/CN100361266C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06290752A (en) * | 1993-03-31 | 1994-10-18 | Toshiba Lighting & Technol Corp | High pressure sodium lamp and luminaire |
| JPH07122236A (en) * | 1993-10-21 | 1995-05-12 | Japan Storage Battery Co Ltd | High pressure sodium lamp |
| CN1321328A (en) * | 1999-08-31 | 2001-11-07 | 皇家菲利浦电子有限公司 | Metal halide lamp |
| CN2404212Y (en) * | 1999-12-16 | 2000-11-01 | 王平 | Lead-out tube of high-voltage sodium lamp |
| CN2687833Y (en) * | 2003-09-11 | 2005-03-23 | 俞鹤庆 | Single-crystal alumina ceramic high-strength gas discharge camp tube |
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| CN1595601A (en) | 2005-03-16 |
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