CN1089188C - Fluorescent lamp and manufacturing method thereof - Google Patents
Fluorescent lamp and manufacturing method thereof Download PDFInfo
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- CN1089188C CN1089188C CN96104435A CN96104435A CN1089188C CN 1089188 C CN1089188 C CN 1089188C CN 96104435 A CN96104435 A CN 96104435A CN 96104435 A CN96104435 A CN 96104435A CN 1089188 C CN1089188 C CN 1089188C
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- mercury
- oxide
- fluorescent lamp
- diaphragm
- phosphor layer
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Abstract
A highly safe fluorescent lamp is disclosed, in a mixed layer having couplings of phosphors and a metal oxide such as yttrium oxide is formed on the inner surface of a glass bulb. The couplings of the mixed layer strongly couples the grains arranged in crosslinked state between the phosphor grains of the phosphor material. A first thin film of the metal oxide is formed between the glass bulb and the mixed layer. A second thin film of the same metal oxide is formed on the inner surface of the mixed layer nearer to the bulb center. The amount of mercury sealed in the glass bulb thus is reduced, thereby minimizing the mercury consumption which has so far been the problem against environmental protection.
Description
The present invention relates to fluorescent lamp and manufacture method thereof.
Usually, in fluorescent lamp,, adopt the light of the excitation wavelength 254nm that is enclosed in mercury wherein for making the fluorescent material that is coated in the lamp container inner face of forming by glass bulb etc. luminous.Yet, because mercury can usually, be enclosed the excessive mercury greater than luminous necessary amount owing to being consumed by fluorescent material absorption, oxidation etc. in glass bulb.
But mercury is environmentally harmful material, so be advisable so that its use amount is controlled at the least possible degree.
In the prior art, known have the method that prevents that the melanism that caused by mercury and luminous flux from reducing, but the method that prevents that is consumed at mercury is not arranged.
The open communique of Japan Patent discloses a kind of technology that forms overlay film on phosphor layer for 1992 No. 245162, but because described overlay film is a sand class material, is difficult for preventing the intrusion of mercury, and does not reduce the effect of mercury consumption amount.
The present inventor finds that in existing fluorescent lamp, mercury is adsorbed by fluorescent material basically and consumes.That is to say that available Figure 13 of mercury consumption quantitative analysis result of existing fluorescent lamp (40W) is represented.
The objective of the invention is to, it is luminous required minimum fluorescent lamp of limiting the quantity of and manufacture method thereof by the amount of mercury that fluorescent material adsorbs, has that a kind of mercury that prevents is provided.
In fluorescent lamp of the present invention, the surface at the phosphor layer that is positioned at the inner inner surface of enclosing the lamp container that mercury is arranged is formed with by the silicon dioxide of the 254nm resonant line that can see through mercury or the diaphragm that metal oxide constitutes.
In addition, fluorescent lamp of the present invention is enclosed in inside on the inner surface of the lamp container that mercury is arranged the silicon dioxide of the 254nm resonant line that can see through mercury or the hybrid films of metal oxide and fluorescent material.
Also have, fluorescent lamp manufacturing method of the present invention is on the phosphor layer of the inner surface that is positioned at lamp container, forms the permeable diaphragm that is made of silicon dioxide or metal oxide of 254nm resonant line of one deck mercury with siloxanes or alkoxide.
Another kind of fluorescent lamp manufacturing method of the present invention is the above-mentioned alkoxide of beta-diketon coordination thing replacement with metal nitrate, metal sulfate, metal carboxylate, metal.
In the present invention, the diaphragm of phosphor layer is made up of silicon dioxide or metal oxide, can add foreign matter of phosphor or boron in this diaphragm.This diaphragm can prevent that mercury is by phosphor layer absorption (entering between the particle of fluorescent material).
That is, owing to be formed with said protection film on phosphor layer, phosphor layer and mercury are isolated next.Therefore, the chemometamorphism of the phosphor layer that is caused by mercury absorption is suppressed, and, also be inhibited by the mercury consumption that is caused by fluorescent material absorption and oxidation.
Also have and since said protection film use with the low element of the chemical affinity of mercury as constitute, thereby, can prevent chemical combination with mercury.
Have again, in the present invention,, needn't worry that the visible light of fluorescent lamp is interdicted owing on phosphor layer, form the diaphragm that can see through the excitation wavelength of mercury.
Below, in conjunction with the accompanying drawings, one embodiment of the invention are described.
Fig. 1 is the sectional view of fluorescent lamp in one embodiment of the invention.
Among Fig. 1; glass bulb 2 has the lamp container of electrode 1 for two ends; on glass bulb 2, be formed with phosphor layer 3, be formed with by the monomer of vitrified, chemically stable silicon dioxide, aluminium oxide, hafnium oxide, zirconia, vanadium oxide, niobium oxide and yittrium oxide on this phosphor layer or be selected from the diaphragm that material is formed more than two kinds 4 of above-claimed cpd.Diaphragm 4 covers fully and covers phosphor layer 3.In the glass bulb 2, with rare gas, enclosing has mercury.
In addition, in the occasion of the fluorescent lamp of high load capacity, diaphragm can be because aging and deficient in stability, therefore, and the load 0.35W/cm equal extent of the load of the fluorescent lamp of the embodiment of the invention and the straight pipe type fluorescent lamp of underload, ring fluorescent lamp.
Then, in conjunction with Fig. 2, the effect that prevents that mercury from being adsorbed by phosphor layer is described.
Among Fig. 2, the electronics 21 (representing the motion of electronics 21 with a) of being emitted by electrode 1 excites mercury atom 22, and the ultraviolet light c of the excitation wavelength 254nm of mercury atom 22 (representing the motion of mercury atom 22 with b) sees through diaphragm 4, phosphor layer 3 is excited and luminous.But,, thereby can suppress the rotten of fluorescent material largely because diaphragm 4 has the effect of interdicting near the mercury resonant line the 185nm especially.According to Stokes' law, this phosphor layer 3 sends wavelength than the long visible light of the excitation wave of mercury, makes lamp produce light.
Even mercury atom 22 clashes into diaphragm 4 owing to Brownian movement, but because diaphragm 4 is vitrified film smooth, that cover phosphor layer 3, mercury atom 22 is minimum by the possibility of phosphor layer 3 oxidations, generation mercury oxide.And the possibility that mercury atom 22 arrives glass bulb 2 becomes minimum.Therefore, can prevent that also the sodium atom 23 that contains in mercury atom 22 and the glass bulb 2 from forming amalgam.Its result can suppress mercury consumption, the amount of mercury of enclosing in the glass bulb 2 can be controlled at luminous necessary minimum.
Fig. 3 is expression silicon dioxide (SiO
2) figure of ultraviolet transmission rate of diaphragm.As shown in Figure 3, because this diaphragm sees through the light of the 254nm resonant line of mercury in 100% ground basically, fluorescent material luminous there is not harmful effect.
Fig. 4 is expression aluminium oxide (Al
2O
3) figure of ultraviolet transmission rate of diaphragm.As shown in Figure 4, because this diaphragm sees through the light of the 254nm resonant line of mercury in 100% ground basically, fluorescent material luminous there is not harmful effect.
Fig. 5 is expression hafnium oxide (HfO
2) figure of ultraviolet transmission rate of diaphragm.As shown in Figure 5, because this diaphragm sees through the light of the 254nm resonant line of mercury in 100% ground basically, fluorescent material luminous there is not harmful effect.
Fig. 6 is expression zirconia (ZrO
2) figure of ultraviolet transmission rate of diaphragm.As shown in Figure 6, because this diaphragm sees through the light of the 254nm resonant line of mercury in 95% ground basically, fluorescent material luminous there is not harmful effect.
Fig. 7 is expression vanadium oxide (V
2O
5) figure of ultraviolet transmission rate of diaphragm.As shown in Figure 7, because this diaphragm sees through the light of the 254nm resonant line of mercury in 85% ground basically, fluorescent material luminous there is not harmful effect.
Fig. 8 is expression niobium oxide (Nb
2O
5) figure of ultraviolet transmission rate of diaphragm.As shown in Figure 8, because this diaphragm sees through the light of the 254nm resonant line of mercury in 85% ground basically, fluorescent material luminous there is not harmful effect.
Fig. 9 is expression yittrium oxide (Y
2O
3) figure of ultraviolet transmission rate of diaphragm.As shown in Figure 9, because this diaphragm sees through the light of the 254nm resonant line of mercury in 85% ground basically, fluorescent material luminous there is not harmful effect.
The fluorescent lamp of the embodiment of the invention can prevent that mercury from being adsorbed by phosphor layer 3 owing to have diaphragm 4.
In addition, owing to be formed with diaphragm 4 on the phosphor layer 3, phosphor layer 3 is isolated next with mercury.Therefore, the chemometamorphism of the phosphor layer 3 that is caused by mercury absorption is suppressed, and simultaneously, is adsorbed with oxidized and mercury consumption that cause also is inhibited by mercury.
Also have, do not exist yet mercury by phosphor layer 3, with glass bulb 2 in the sodium that contains generate the possibility that amalgam is consumed mercury.
In addition, owing on phosphor layer 3, be formed with the diaphragm 4 that can see through the excitation wavelength of mercury, there is not the possibility of the visible light that interdicts fluorescent lamp.
Below, in conjunction with flow chart shown in Figure 10, fluorescent lamp manufacturing method of the present invention is described.
At first, the modulation fluorescent material is coated on the glass bulb inner surface with this fluorescent material again, and drying forms phosphor layer.Then, the slaine of coating siloxanes or alcohol on phosphor layer, dry under the room temperature, with siloxanes or hydrolysis of alkoxide.The alcohol that produces along with the carrying out of the polymerization reaction of siloxanes or alkoxide is removed in vaporization again, then, glass bulb is suitably carried out heat treated in sintering furnace, generates diaphragm.
Below, by common fluorescent lamp manufacturing method, that is, glass bulb is bled, enclose rare gas and mercury more therein, with technologies such as glass bulb involutions, make fluorescent lamp.
In the present invention, formed diaphragm is the occasion of the hybrid films of silicon dioxide or metal oxide and fluorescent material on the glass bulb inner surface, can carry out as stated above too.Similarly, in this hybrid films, also can add foreign matter of phosphor or boron.
With the slaine of siloxanes or alcohol is that the set out diaphragm of material becomes macromolecular structure (M-O-M-O ...) but not low molecular structure.Thus, can form said protection film.
As an example of diaphragm, be example with tetraethoxy-silicane (TEOS), according to the chemical reaction course of siloxanes, the generation technology of the diaphragm of phosphor layer is described.Specific as follows:
Tetraethoxy-silicane produces ethanol, the ethyoxyl (OC of tetraethoxy-silicane through hydrolysis
2H
5) (OH) replaced, become silanol by hydroxyl.This silanol further dewaters, polymerization.Carry out this reaction repeatedly and carry out ripe refining, obtain firm SiO at about 500 ℃
2Diaphragm.
In addition; confirmed already; in the method for the invention; use the inorganic metal compound such as beta-diketon coordination thing of metal nitrate, metal sulfate, metal carboxylate, metal and organo-metallic compound as setting out material; also can be without hydrolysis reaction; by pyrolysis oxidation organo-metallic compound, obtain as end product and above-mentioned same metal oxide diaphragm.
Also have, using arbitrary inorganic metal compound and organo-metallic compound,, be advisable in 300 ℃-800 ℃ scope, to carry out ripe refining by the occasion of pyrolysis and oxidation reaction formation diaphragm.This point can be confirmed by differential thermal analysis.
Have again, except that silicon dioxide, the monomer that uses aluminium oxide, hafnium oxide, zirconia, vanadium oxide, niobium oxide and yittrium oxide or be selected from above-claimed cpd more than two kinds as the occasion of diaphragm, method of the present invention also can similarly be implemented as above-mentioned.
Below, in conjunction with Figure 11, the effect of the inhibition mercury diffusion of various diaphragms is described.
Among Figure 11; with yittrium oxide diaphragm and alumina protective layer is example; shown the clear bulb that the soda-lime glass that do not apply diaphragm constitutes fluorescent lamp, on above-mentioned clear bulb inner surface, be coated with the fluorescent lamp of the thick yittrium oxide diaphragm of about 0.6 μ m; with carry out 2000 hours life test at the fluorescent lamp that has been coated with the thick alumina protective layer of about 0.6 μ m on the above-mentioned clear bulb inner surface after, mercury is at the analysis result of the diffusing capacity of depth direction.
Among the figure, the depth direction of transverse axis for representing, the amount of mercury of the longitudinal axis for representing with logarithmic scale with 10 common scale scales.
Among the figure; curve A represents not apply the mercury diffusing capacity of fluorescent lamp of the clear bulb that is made of soda-lime glass of diaphragm; curve B is represented the amount of the pellumina diffusion of mercury on above-mentioned clear bulb inner surface, and curve C is represented the amount of the yittrium oxide film diffusion of mercury on above-mentioned clear bulb inner surface.
Figure 11 confirms experimentally, and said protection film has the effect of the mercury consumption that inhibition causes by absorption.
Below, be example to use yittrium oxide as the fluorescent lamp of diaphragm, in conjunction with Figure 12, the effect of cutting down the mercury use amount is described.
The use amount of mercury is reduced to indivisible 5mg by the 10mg that has fluorescent lamp now, measure respectively, the results are shown in Figure 12 with regard to fluorescent lamp that does not apply diaphragm and luminous flux with fluorescent lamp of yittrium oxide diaphragm.
Among Figure 12, curve D, E represent the fluorescent lamp with diaphragm respectively and have the fluorescent lamp of yittrium oxide diaphragm.
Can know clearly that by Figure 12 the life-span that does not have the fluorescent lamp of diaphragm is 4000 hours, and have the fluorescent lamp of yittrium oxide, after through 8000 hours, still keep 90% luminous flux sustainment rate.And, after through 12000 hours, still have the luminous flux sustainment rate more than 80%.
By Figure 12, confirmed that said protection film has the effect of the mercury use amount that can significantly cut down fluorescent lamp.
Also have, the present invention not only can be applicable to starter formula fluorescent lamp, and the present invention also can be applicable to have the quick start formula fluorescent lamp of conductive film, and this point is self-evident.
In addition, in the above-described embodiments, be illustrated with regard to the occasion that electrode is arranged in the lamp container, the present invention also can be applicable to electrodeless fluorescent lamp.
As mentioned above; the present invention is because form can be through the diaphragm 254nm resonant line of mercury, that be made up of silicon dioxide or metal oxide the surface by the phosphor layer on the inner surface of lamp container; suppressed mercury effectively and adsorbed by phosphor layer and be consumed meaninglessly, thus can significantly reduce the mercury that becomes pollution problem use amount, a kind of fluorescent lamp that can improve environmental safety is provided.
In addition,,, can on phosphor layer, carry out the polymerization reaction of the slaine of above-mentioned siloxanes or alcohol, obtain firm protective by using the manufacturing diaphragms such as slaine of siloxanes or alcohol according to fluorescent lamp manufacture method of the present invention.Also have,, can be used for improving the chemical stability of phosphor layer because diaphragm is kept apart phosphor layer and mercury atom.
Fig. 1 is the sectional view of the fluorescent lamp of one embodiment of the invention.
Fig. 2 is the figure that lights a lamp and act on and be formed on the effect of the diaphragm on the phosphor layer of explanation fluorescent lamp of the present invention.
Fig. 3 is the figure of the ultraviolet transmission rate of expression silicon dioxide protective film.
Fig. 4 is the figure of the ultraviolet transmission rate of expression alumina protective layer.
Fig. 5 is the figure of the ultraviolet transmission rate of expression hafnium oxide diaphragm.
Fig. 6 is the figure of the ultraviolet transmission rate of expression zirconia diaphragm.
Fig. 7 is the figure of the ultraviolet transmission rate of expression vanadium oxide diaphragm.
Fig. 8 is the figure of the ultraviolet transmission rate of expression niobium oxide diaphragm.
Fig. 9 is the figure of the ultraviolet transmission rate of expression yittrium oxide diaphragm.
Figure 10 is the flow chart of explanation fluorescent lamp manufacture method of the present invention.
Figure 11 is the figure of the ability that prevents the mercury diffusion of expression yittrium oxide and alumina protective layer.
Figure 12 has the figure of the relation of life-span of the fluorescent lamp of diaphragm and existing fluorescent lamp and luminous flux sustainment rate for expression.
Figure 13 is the mercury consumption quantitative analysis result's of the existing fluorescent lamp of expression (40W) figure.Symbol description:
1 electrode, 2 glass bulbs, 3 phosphor layers
4 diaphragms
Claims (8)
1. fluorescent lamp; it is characterized in that; enclose in inside on the phosphor layer of inner surface of the lamp container that mercury is arranged, have the Tou Guoed mercury of making by silicon dioxide or metal oxide the 254nm resonant line, can prevent the diaphragm that mercury is adsorbed by above-mentioned phosphor layer.
2. fluorescent lamp as claimed in claim 1 is characterized in that, described metal oxide is to be selected from least a in aluminium oxide, hafnium oxide, zirconia, vanadium oxide, niobium oxide and the yittrium oxide.
3. fluorescent lamp as claimed in claim 1 or 2 is characterized in that, has added foreign matter of phosphor or boron in diaphragm.
4. a fluorescent lamp is characterized in that, encloses in inside on the inner surface of the lamp container that mercury is arranged, and having mixing, can to see through hybrid films and this hybrid films that the silicon dioxide of mercury excitation wavelength 254nm or metal oxide and fluorescent material forms be continuous film.
5. fluorescent lamp as claimed in claim 4 is characterized in that, described metal oxide is to be selected from least a in aluminium oxide, hafnium oxide, zirconia, vanadium oxide, niobium oxide and the yittrium oxide.
6. as claim 4 or 5 described fluorescent lamps, it is characterized in that, in diaphragm, added foreign matter of phosphor or boron.
7. a fluorescent lamp manufacturing method is characterized in that, on the phosphor layer of the inner surface of lamp container, forms by the silicon dioxide of the 254nm resonant line that can see through mercury or the diaphragm that metal oxide constitutes with the slaine of siloxanes or alcohol.
8. fluorescent lamp manufacturing method as claimed in claim 7 is characterized in that, replaces the slaine of alcohol with the beta-diketon coordination thing of metal nitrate, metal sulfate, metal carboxylate, metal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19454695A JPH08106881A (en) | 1994-08-11 | 1995-07-31 | Fluorescent lamp and its manufacture |
| JP194546/95 | 1995-07-31 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB00118332XA Division CN1138297C (en) | 1995-07-31 | 2000-06-09 | Method for manufacturing fluorescent lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1144395A CN1144395A (en) | 1997-03-05 |
| CN1089188C true CN1089188C (en) | 2002-08-14 |
Family
ID=16326340
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96104435A Expired - Fee Related CN1089188C (en) | 1995-07-31 | 1996-04-05 | Fluorescent lamp and manufacturing method thereof |
| CNB00118332XA Expired - Fee Related CN1138297C (en) | 1995-07-31 | 2000-06-09 | Method for manufacturing fluorescent lamp |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB00118332XA Expired - Fee Related CN1138297C (en) | 1995-07-31 | 2000-06-09 | Method for manufacturing fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN1089188C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE60234017D1 (en) * | 2001-02-19 | 2009-11-26 | Panasonic Photo & Lighting Co | ELECTRICAL DISCHARGING TUBES, METHOD FOR THE PRODUCTION THEREOF, STROBOSCOPE EQUIPMENT WITH TUBE AND CAMERA |
| CN100501902C (en) * | 2005-07-18 | 2009-06-17 | 深圳市中麟电光源有限公司 | Coating liquid for protective film of cold cathode fluorescent lamp and its preparing method |
| EP1798754A3 (en) * | 2005-12-16 | 2012-07-04 | Toshiba Lighting & Technology Corporation | Fluorescent lamp comprising a protective film, and lighting fixture therewith |
| JP4525798B2 (en) * | 2008-05-28 | 2010-08-18 | ウシオ電機株式会社 | Short arc type mercury lamp |
| US8629608B2 (en) * | 2011-12-02 | 2014-01-14 | General Electric Company | Fluorescent lamp of improved lumen maintenance and mercury consumption |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0638625A1 (en) * | 1993-07-30 | 1995-02-15 | Toshiba Lighting & Technology Corporation | Luminescent material for a mercury discharge lamp |
-
1996
- 1996-04-05 CN CN96104435A patent/CN1089188C/en not_active Expired - Fee Related
-
2000
- 2000-06-09 CN CNB00118332XA patent/CN1138297C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0638625A1 (en) * | 1993-07-30 | 1995-02-15 | Toshiba Lighting & Technology Corporation | Luminescent material for a mercury discharge lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1138297C (en) | 2004-02-11 |
| CN1144395A (en) | 1997-03-05 |
| CN1282092A (en) | 2001-01-31 |
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Granted publication date: 20020814 Termination date: 20100405 |