CN201051488Y - A storage electrode for high light efficiency and high voltage sodium lamp - Google Patents
A storage electrode for high light efficiency and high voltage sodium lamp Download PDFInfo
- Publication number
- CN201051488Y CN201051488Y CNU2007200666501U CN200720066650U CN201051488Y CN 201051488 Y CN201051488 Y CN 201051488Y CN U2007200666501 U CNU2007200666501 U CN U2007200666501U CN 200720066650 U CN200720066650 U CN 200720066650U CN 201051488 Y CN201051488 Y CN 201051488Y
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- tungsten
- pressure mercury
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Abstract
The utility model belongs to the electric light source technical field, in particular to a dispenser electrode for manufacturing high-pressure mercury lamps with high luminous efficacy and long service life. The electrode is formed by the high temperature sintering of a center tungsten rod and a cylinder type synthetic body which is arranged at the periphery and takes oxidizing substances as essential substances, the cylinder type synthetic body comprises components of tungsten, Y2O3, La2O3, Gd2O3, and BCT according to proper weight proportions. The electrode has the advantages of strong emission capacity, good anti-toxic character, low escape power, neon-ion bombardment, and long-term stable conveying of electronic emitting material and the like. The high-pressure mercury lamp prepared by the electrode is used, the high-pressure xenon gas is not filled in, and the starting requirement is similar to that of the traditional high-pressure mercury lamp. The luminous efficacy is enhanced by more than 20% of the national normalized value, the luminous frequency is less than or equal to 5% after reaching 4,000 hours, the service life can be extended more than one time, and the energy-saving and the material-saving effects are substantially provided.
Description
Technical field
The utility model belongs to the electric light source technology field, is specifically related to a kind of electrode structure that is used to produce high light efficiency high-pressure sodium lamp.
Technical background
The luminous efficiency and the principal element in life-span of decision gaseous discharge lamp are the electrode performance of lamp.The electrode of high-pressure sodium lamp adopts the outer structure around tungsten wire ring of tungsten bar usually, and fills the barium tungstate electron-like powder as electronic emission material between the tungsten wire ring gap.This class electrode has good electron emission capability and anti-evaporability, and its work function is between 1.63ev-2.07ev, and shortcoming is that the ability and the anti-poisoning capability of anti-ion bombardment is poor, and the ratio that the electrode thermal losses accounts for lamp power is also big more, thereby has limited the light efficiency of lamp.Increase along with waiting burning-point time is filled in the preferential electronic emission material loss quickly between the tungsten circle, and the emitting performance of electrode is also descended quickly.Pipe was pressed quickly risen, the light rate is increased, thus the life-span (under the 220V line voltage, tube voltage drop rises to about 160 volts, and lamp will extinguish automatically) of having limited lamp.
Therefore, development has lower electrode heating loss power and has the novel electrode of more stable electron emission capability, just can improve the light efficiency and the life-span of lamp, thereby reaches energy-conservation and double effects material-saving.This sets up conservation-minded society to China undoubtedly and is significant.
Summary of the invention
The purpose of this utility model is to propose a kind of reserve type electrode that is used for high-pressure sodium lamp that improves light efficiency and index of aging.
The reserve type electrode that is used for high-pressure sodium lamp that the utility model proposes, its structure as shown in Figure 1.It is made up of the column type compound body 2 that tungsten bar 1 and multivariant oxide and tungsten powder mix; Tungsten bar 1 is positioned at the center of column type compound body 2, its degree of depth of inserting column type compound body 2 be compound body length 1/3 outside stretching out compound body in the 3mm scope; The diameter of tungsten bar 1 is 0.2mm-2.5mm; The diameter of column type compound body 2 is 1mm-10mm, and length is 2mm-12mm.Concrete numerical value determines according to the different capacity of lamp.
In the utility model, described column type compound body 2 is made up of by following weight proportion following column element and oxide:
W：50％-90％，
Y
2O
3：2％-20％，
La
2O
3：2％-20％，
Gd
2O
3：2％-20％，
BCT：2％-15％，
Total amount satisfies 100%.
Here, BCT is barium monoxide (BaO), calcium oxide (CaO) and tungsten oxide (W
2O
3) mixture.
After the multicomponent mixture of aforementioned proportion fully mixed, add an amount of curing agent and binding agent, then with the repressed moulding of tungsten bar, and through biscuiting, remove binding agent,, promptly get terres rares reserve type electrode of the present utility model again through 1500-1700 ℃ of high temperature sintering 1-2 hour.The curing agent here is aluminium oxide, silica etc.Binding agent is for using organic binder bond usually.
Rare-earth oxide in the above-mentioned component not only has superior electron emissivity, the ability of toxicity and anti-ion bombardment all was better than the alkaline-earth oxide electrode greatly during it was anti-, and its work function lower (1ev-1.2ev), have better electrode arc starting performance and lower electrode thermal losses.The electron emitter of compacting formula column type can be diffused into oxide the electrode head surface continuously, to replenish the loss of electric arc terminal place electrode surface, has the reserve function of electronic emission material.
Further, terres rares reserve type electrode of the present utility model can be used for the manufacturing of 50 watts of-1000 watts of high-pressure sodium lamps.
Description of drawings
Fig. 1 is structural diagrams of the present utility model (power≤150 watt high-pressure sodium lamp electrode structure).
Fig. 2 is structural diagrams of the present utility model (power 〉=250 watt high-pressure sodium lamp electrode structure).
Number in the figure: 1 center tungsten bar, 2 is the polynary compound body of column type, and 3 is the degree of depth diagram that tungsten bar 1 inserts the column type compound body, and 4 is the length diagram that tungsten bar 1 stretches out the column type compound body.
Embodiment
Embodiment 1:
Adopt electrode structure shown in Figure 1, tungsten shank diameter 0.4mm, long 4.5mm, insertion depth are half of length of the polynary compound body 2 of column type; The long 4mm of column type compound body, diameter are 1.6mm, and the weight proportion of the constituent of column type compound body 2 is as follows: W:81%, Y
2O
3: 5%, La
2O
3: 3%, Gd
2O
3: 3%, BCT:8%.During preparation, add an amount of curing agent aluminium oxide and binding agent paraffin wax, with the tungsten bar, compression moulding, through 700 ℃-900 ℃ biscuiting 20-30 minute, 1600 ℃ of high temperature sinterings 1.5 hours, promptly get reserve type electrode of the present invention then.The electrode that can be used as 100 watts of high-pressure sodium lamps.This high-pressure sodium lamp does not adopt the method that pours high-pressure xenon, makes parameter and traditional basically identical, the startup method also with use always identical.After tested, the luminous flux of this lamp is 10086 lumens, exceeds 26% than national normal value (8000 lumen); Burning-point through 4000 hours, the tube voltage drop of lamp only rise 5 volts, light sustainment rate 〉=96%, and the life-span of hence one can see that lamp will be than the prolongation of traditional electrode more than one times.
Embodiment 2:
Adopt electrode structure shown in Figure 2, the diameter 0.8mm of tungsten bar 1, long 9mm, tungsten bar 1 stretch out an end 1mm of column type compound body 2; The long 5mm of compound body 2, diameter are 3mm.The weight proportion of the constituent of column type compound body 2 is as follows: W:70%, Y
2O
3: 5%, La
2O
3: 8%, Gd
2O
3: 5%, BCT:12%.During preparation, add an amount of curing agent silica and binding agent paraffin wax, with the tungsten bar, compression moulding through 700 ℃ of-900 ℃ of biscuitings 30 minutes, 1700 ℃ of high temperature sinterings 2 hours, promptly gets reserve type electrode of the present invention then.This electrode is used for the manufacturing of 250 watts of high-pressure sodium lamps, makes parameter also with traditional identical.The luminous flux of this lamp is 31337 lumens, exceeds 25.5% than national normal value (25000 lumen); Life-span burning-point through 5000 hours, tube voltage drop only rise 3 volts, and luminous flux but slightly rises, and the life-span of visible light will increase nearly more than 2 times.
Embodiment 3:
Adopt electrode structure shown in Figure 2, the diameter 1.2mm of tungsten bar 1, long 10mm, tungsten bar 1 stretch out an end 2mm of column type compound body 2; The long 10mm of column type compound body 2, diameter are 6mm.The weight proportion of the constituent of column type compound body 2 is as follows: W:80%, Y
2O
3: 2%, La
2O
3: 5%, Gd
2O
3: 8%, BCT:5%.During preparation, add an amount of curing agent aluminium oxide and binding agent paraffin wax, with the tungsten bar, compression moulding through 700 ℃ of-800 ℃ of biscuitings 20 minutes, in 1600 ℃ of high temperature sinterings 1.5 hours, promptly gets reserve type electrode of the present invention then.Its performance is close with embodiment 2.
Claims (1)
1. a reserve type electrode that is used for high light efficiency high-pressure sodium lamp is characterized in that being made up of tungsten bar (1) and column type compound body (2); Tungsten bar (1) is positioned at the center of column type compound body (2), its degree of depth of inserting column type compound body (2) be compound body (2) length 1/3 outside stretching out compound body in the 3mm scope; The diameter of tungsten bar (1) is 0.2mm-2.5mm; The diameter of column type compound body (2) is 1mm-10mm, and length is 2mm-12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200666501U CN201051488Y (en) | 2007-01-25 | 2007-01-25 | A storage electrode for high light efficiency and high voltage sodium lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200666501U CN201051488Y (en) | 2007-01-25 | 2007-01-25 | A storage electrode for high light efficiency and high voltage sodium lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201051488Y true CN201051488Y (en) | 2008-04-23 |
Family
ID=39337981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200666501U Expired - Fee Related CN201051488Y (en) | 2007-01-25 | 2007-01-25 | A storage electrode for high light efficiency and high voltage sodium lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201051488Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814419B (en) * | 2009-12-02 | 2012-02-08 | 宁波亚茂照明电器有限公司 | Sodium lamp and manufacture method |
-
2007
- 2007-01-25 CN CNU2007200666501U patent/CN201051488Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814419B (en) * | 2009-12-02 | 2012-02-08 | 宁波亚茂照明电器有限公司 | Sodium lamp and manufacture method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080423 Termination date: 20110125 |