WO2003097544A1 - Borosilicatglas mit uv-blockung und seine verwendung sowie fluoreszenzlampe - Google Patents
Borosilicatglas mit uv-blockung und seine verwendung sowie fluoreszenzlampe Download PDFInfo
- Publication number
- WO2003097544A1 WO2003097544A1 PCT/EP2003/003112 EP0303112W WO03097544A1 WO 2003097544 A1 WO2003097544 A1 WO 2003097544A1 EP 0303112 W EP0303112 W EP 0303112W WO 03097544 A1 WO03097544 A1 WO 03097544A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- borosilicate glass
- glasses
- weight
- glass according
- blocking
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
- C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
- C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
- C03C3/093—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium containing zinc or zirconium
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/302—Vessels; Containers characterised by the material of the vessel
Definitions
- the invention relates to a borosilicate glass with UV blocking and its use.
- the invention also relates to a fluorescent lamp.
- backlighting for example displays z. B. from personal computers, laptops, pocket calculators, vehicle navigation systems, fluorescent lamps, so-called “backlights" are used.
- Typical sizes for such miniaturized lamps are outside diameters between 2 and 5 mm.
- Typical inner diameters are between 1, 8 and 4.8 mm.
- the glasses used must be capable of being melted in a vacuum-tight manner with a metal or a metal alloy used in lamp manufacture. To do this, they must have a thermal expansion matched to the thermal expansion behavior of the metal or metal alloy.
- tungsten with the thermal expansion coefficient ⁇ 20/3 oo of W of 4.4 x 10 "6 / K glasses with ⁇ 20/3 oo between 3.4 x 10 " 6 / K and .4.3 x 10 "6 / K are very suitable.
- glasses with ⁇ 20 / 3oo are between 4.3 x 10 " 6 / K and 6.0 x 10 "6 / K well suited.
- the glasses should have rather low processing temperatures VA, i.e. V A ⁇ 1200 ° C, so that they can be processed at rather low temperatures.
- the transformation temperature T g should be adapted to the melting behavior of the metal or metal alloy to be melted. In the case of a fusion with Kovar, it should preferably be between 440 ° C and 530 ° C. A T g up to 580 ° C is well suited for a fusion with tungsten.
- the transmission curve is essential for the glasses. In the visible, the highest possible light transmittance is required in order to obtain a high luminous efficacy of the lamp, in the UV range no or only a low transmission is desired in order to let as little of the harmful UV radiation pass through.
- the requirements for UV blocking depend on the uses of the glasses. For example, the Hg line at 253 nm should be blocked when used as lamp glasses for fluorescent lamps.
- a high UV blocking ⁇ 253 nm is desired for backlights in order to protect irradiated plastic parts, e.g. B. in laptops, do not yellow and become brittle. This is achieved by glasses with a UV transmission at ⁇ ⁇ 254 nm ⁇ of ⁇ 0.1%, measured on 0.2 mm thick samples. For other uses, a UV transmission ⁇ ⁇ 0.1% at ⁇ ⁇ 240 nm is sufficient.
- the transition from the opaque to the transmissive wavelength range should be as short as possible, i.e. the transmission curve should be as steep as possible in this range.
- the minimum requirement for transmission in the visible wavelength range is a transmission of 90% at ⁇ > 400 ' nm and a sample thickness of 0.2 mm. So ⁇ (> 400 nm; 0.2 mm)> 90% is required. ,
- Another essential property of glasses for fluorescent lamps, in particular for "backlights” is the resistance to solarization, which is necessary in order to enable the lamps to have a long service life, that is to say a luminous efficiency that is as constant as possible after a 15-hour HOK-4 irradiation, i.e. an irradiation with a high-pressure mercury lamp with a main emission at 365 nm and an irradiance of 850 ⁇ W / cm 2 at 200 to 280 nm at a distance of 1 m, on a 0.2 mm thick glass sample show a transmission drop of at most 5% at 300 nm.
- a 15-hour HOK-4 irradiation i.e. an irradiation with a high-pressure mercury lamp with a main emission at 365 nm and an irradiance of 850 ⁇ W / cm 2 at 200 to 280 nm at a distance of 1 m, on a 0.2 mm thick glass sample show a transmission
- the borosilicate glass for discharge lamps described in JP 8-12369 A contains a total of 0.03 to 3% by weight of at least two of the four components V 2 O 5 , Fe 2 O 3 , TiO 2 and CeO 2 for UV blocking. With these components, with partial high individual units and their combinations a high transmission 'and a high solarization is not adjustable.
- No. 5,747,399 describes a glass for miniaturized fluorescent lamps which is said to maintain its solarization stability and its UV impermeability through TiO 2 and / or PbO and / or Sb 2 O 3 .
- doping with TiO 2 in particular at high contents, leads to a coloration of the glass.
- PbO should be avoided because of the environmental problems.
- the object is achieved by a borosilicate glass according to the main claim.
- a glass with the desired transmission properties consists of the basic glass system (in% by weight based on oxide): 55 to 80 SiO 2 , 8 to 25 B 2 O 3 , 0.5 to 10 Al 2 O 3 , 1 to 16 Li 2 O + Na 2 O + K 2 O, 0 to 6 MgO + CaO + SrO + BaO, 0 to 3 ZnO and 0 to 5 ZrO 2 .
- Essential to the invention is the presence of M0O 3 and / or Bi 2 ⁇ 3, namely from a total of 0.01 to 5% by weight with 0 to 3% by weight M0O 3 and 0 to 5
- the minimum content of M0O 3 and / or Bi 2 O 3 is necessary to achieve the high UV blocking. Higher levels of M0O 3 and / or B. 2 O 3 would lead to a coloring of the glass. A minimum sum of 0.1% by weight, in particular a minimum sum of 0.2% by weight, and a maximum sum of 3% by weight is preferred. A minimum content of 0.4% by weight M0O 3 or a minimum content of 1.0% by weight Bi 2 O 3 is particularly preferred. B- 2 O 3 also greatly improves the solarization stability of the glass. Especially in the particularly preferred embodiments, UV blocking up to 254 nm, ie a ⁇ ⁇ 0.1% at ⁇ ⁇ 254 nm with a sample thickness of 0.2 mm, can be achieved. A minimum M0O 3 content of 0.6% by weight or a minimum B 2 O 3 content of 1.3% by weight is very particularly preferred.
- the glass preferably consists of the glass system (in% by weight on an oxide basis): SiO 2 55-79, B 2 O 3 10-25, Al 2 O 3 0.5-10, Li 2 O + Na 2 O + K 2 0 1 - 16, MgO + CaO + SrO + BaO 0 - 6, ZnO 0 - 3, ZrO 2 0 - 1; Bi 2 O 3 0-5, M0O 3 0-3; with BiO 2 + MoO 3 0.1 - 5.
- the glass consists of the following glass system: Si0 2 55-79; B 2 O 3 8-12.5; Al 2 O 3 0.5-10; Li 2 O + Na 2 O + K 2 O 1-16; MgO + CaO + SrO + BaO 0-6; ZnO 0-3; ZrO 2 0-3; Bi 2 O 3 0-5; M0O 3 0-3; with Bi 2 O 3 + M0O 3 0.01 - 5.
- Glasses from the composition ranges mentioned with a content of 70-80% by weight SiO have thermal expansion coefficients 020/300 between 3.4 x 10 "6 / K and 4.3 x 10 " 6 / K and are therefore particularly good for Suitable for fusion with tungsten.
- Glasses from the composition range are SiO 2 73-79, B 2 O 3 12.5-25 for the fusion with tungsten; Al 2 O 3 0.5-10; Li 2 O + Na 2 O + K 2 O 1-11; MgO + CaO + SrO + BaO 0-6; ZnO 0-3; ZrO 2 0-5; Bi 2 O 3 0-5; MoO 3 0-3; with Bi 2 O 3 + MoO 3 0.01-5 particularly preferred.
- Glasses from the composition ranges mentioned with a content of 55-75% by weight SiO 2 have coefficients of thermal expansion between 4.3 x 10 "6 / K and 6.0 x 10 " 6 / K and are therefore particularly good for fusing with Suitable for Kovar.
- Glasses from the composition range are SiO 2 55-73 for the fusion with Kovar; B 2 O 3 15-25; Al 2 O 3 1-10; Li 2 O + Na 2 O + K 2 O 4 - 16; MgO + CaO + SrO + BaO 0-6; ZnO 0-3; ZrO 2 0
- the glass can contain customary refining agents in customary amounts, e.g. B. Evaporation Lautstoff such as CI " and F " , but also redoxic acid agents, which are effective due to their polyvalent cations, for. B. SnO 2 and Sb 2 ⁇ 3 .
- the glass contains 0 - 1 wt .-% Sb 2 O 3, 0 - 1 wt .-% As 2 O 3, 0 - 1 wt .-% SnO2, 0 - 1 wt .-% CeO 2, 0 - 0.5 wt% CI, 0-1 wt% F, 0-0.5 sulfate, expressed as SO 3 .
- CeO 2 supports refining, but can have a negative impact on solarization stability if the contents are too high.
- the glass can further contain 0-5% by weight of TiO 2 , preferably 0-1% by weight of TiO 2 , and 0
- TiO 2 supports MoO 3 and Bi 2 O 3 by shifting the UV edge, ie the transition between absorption and transmission, into the longer-wave range.
- UV blocking can be achieved not only up to 240 nm, but also up to 254 nm and beyond.
- TiO 2 can be dispensed with entirely or it can be added in such small amounts that its disruptive coloring does not play a role.
- the glass can contain up to 1% by weight of Fe 2 O 3 without disadvantages.
- F ⁇ 2 ⁇ 3 also contributes to the shift of the absorption edge in the longer-wave range.
- the glass can also contain V 2 ⁇ 5, Nb 2 O ⁇ and WO 3 in small proportions which do not impair the glass system.
- the well-homogenized batch was melted, refined and homogenized in a silica glass crucible at 1600 ° C. The glass was then poured and cooled at 20 K / h.
- the table shows thirteen examples of glasses according to the invention (A1 to A13) and two comparative examples (V1, V2) with their compositions (in% by weight on an oxide basis) and their essential properties.
- UV blocking Wavelength at which ⁇ is a maximum of 0.1% (with a sample thickness of 0.2 mm)
- compositions in% by weight based on oxide
- Comparative example V1 has a UV edge that is too low, i.e. it does not block the UV range sufficiently.
- the comparative example V2 containing TiO 2 shows good UV blocking, as is also achieved by the glasses doped according to the invention without the addition of TiO 2 .
- the exemplary embodiments A1, A3, A7, A9 and A10 show purely Bi 2 ⁇ 3 -doped glasses.
- A2, A4, A8, A11 and A12 show pure MoO 3 -doped glasses.
- A6 and A13 are examples of mixed doping with Bi 2 ⁇ 3 and M0O 3 .
- A5 illustrates the supportive effect of the optional component TiO 2 or, compared to V2, the improvement in the blocking by the invention without an increase in the TiO 2 content being necessary.
- the inventive glasses have high solarization, expressed by ⁇ - ⁇ 5 ⁇ (300 nm; 0.2 mm) of ⁇ 5%, a high transmission in the visible expressed by ⁇ (> 400 nm; 0.2 mm)> 90%, and good UV blocking, in particular expressed by ⁇ ( ⁇ 240 nm; 0.2 mm) ⁇ 0.1% or by specifying the highest wavelength at which ⁇ is a maximum of 0.1% (sample thickness 0.2 mm) , It is 240 nm or more.
- the glasses have a UV transmission at ⁇ ⁇ 254 nm of ⁇ ⁇ 0.1%.
- the glasses have a processing temperature V A ⁇ 1200 ° C, which makes them easy to process.
- the glasses have transformation temperatures T g between 440 ° C and 580 ° C. They are therefore well suited for fusion with Kovar, for which the glasses with T g between 440 and 530 ° C. are preferably used, or with tungsten, for which the glasses with higher T g are preferably used.
- the glasses have a thermal expansion coefficient o- 2 o / 3 oo between 3.4 x 10 "6 / K and 6.0 x 10 " 6 / K. They are therefore sufficiently well adapted to the thermal expansion behavior of tungsten or Kovar, ie they can be fused in a vacuum-tight manner with one of these materials.
- glasses are very well suited for the production of fluorescent lamps.
- the glasses have a high resistance to crystallization.
- the glasses are ideally suited for pipe pulling, especially for pulling pipes with the small diameters mentioned.
- the glasses for fluorescent lamps are therefore also very well suited for the production of miniaturized fluorescent lamps, for example for Backlighting of displays, e.g. B. of personal computers, laptops, notebooks, calculators, car navigation systems, scanners, but also of mirrors and images.
- the fluorescent lamps produced with the glasses according to the invention in particular miniaturized fluorescent lamps, meet the requirements placed on such lamps.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003214255A AU2003214255A1 (en) | 2002-05-16 | 2003-03-26 | Uv-blocking borosilicate glass, the use of the same, and a fluorescent lamp |
JP2004505280A JP2005529048A (ja) | 2002-05-16 | 2003-03-26 | 紫外線遮蔽遮断ホウケイ酸ガラス、その使用、および蛍光ランプ |
US10/512,716 US7517822B2 (en) | 2002-05-16 | 2003-03-26 | UV-blocking borosilicate glass, the use of the same, and a fluorescent lamp |
CNB038108038A CN1307116C (zh) | 2002-05-16 | 2003-03-26 | 防uv硼硅玻璃、其应用以及一种荧光灯 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10221747 | 2002-05-16 | ||
DE10221747.5 | 2002-05-16 | ||
DE10253756.9 | 2002-11-19 | ||
DE10253756A DE10253756B4 (de) | 2002-05-16 | 2002-11-19 | Borosilicatglas mit UV-Blockung und seine Verwendung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003097544A1 true WO2003097544A1 (de) | 2003-11-27 |
Family
ID=29550928
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/003112 WO2003097544A1 (de) | 2002-05-16 | 2003-03-26 | Borosilicatglas mit uv-blockung und seine verwendung sowie fluoreszenzlampe |
Country Status (7)
Country | Link |
---|---|
US (1) | US7517822B2 (de) |
JP (1) | JP2005529048A (de) |
KR (1) | KR20050025182A (de) |
CN (1) | CN1307116C (de) |
AU (1) | AU2003214255A1 (de) |
TW (1) | TWI264422B (de) |
WO (1) | WO2003097544A1 (de) |
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JP2002056808A (ja) * | 2000-05-30 | 2002-02-22 | Asahi Techno Glass Corp | 蛍光ランプ用ガラス管及びそれに適したガラス |
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- 2003-03-26 CN CNB038108038A patent/CN1307116C/zh not_active Expired - Fee Related
- 2003-03-26 AU AU2003214255A patent/AU2003214255A1/en not_active Abandoned
- 2003-03-26 KR KR1020047018226A patent/KR20050025182A/ko not_active Application Discontinuation
- 2003-03-26 WO PCT/EP2003/003112 patent/WO2003097544A1/de active Application Filing
- 2003-03-26 JP JP2004505280A patent/JP2005529048A/ja active Pending
- 2003-03-26 US US10/512,716 patent/US7517822B2/en not_active Expired - Fee Related
- 2003-05-15 TW TW092113229A patent/TWI264422B/zh not_active IP Right Cessation
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Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2006089342A (ja) * | 2004-09-24 | 2006-04-06 | Asahi Techno Glass Corp | 蛍光ランプ用ガラス |
WO2006072449A2 (de) * | 2005-01-04 | 2006-07-13 | Schott Ag | Glas für leuchtmittel mit aussenliegenden elektroden |
WO2006072449A3 (de) * | 2005-01-04 | 2007-01-25 | Schott Ag | Glas für leuchtmittel mit aussenliegenden elektroden |
WO2006106660A1 (ja) * | 2005-04-01 | 2006-10-12 | Matsushita Electric Industrial Co., Ltd. | ランプ用ガラス組成物、ランプ、バックライトユニットおよびランプ用ガラス組成物の製造方法 |
CN101151221A (zh) * | 2005-04-01 | 2008-03-26 | 松下电器产业株式会社 | 灯用玻璃组合物、灯、背光照明单元以及灯用玻璃组合物的制造方法 |
US11214511B2 (en) | 2016-06-17 | 2022-01-04 | Corning Incorporated | Transparent, near infrared-shielding glass ceramic |
US11629091B2 (en) | 2016-06-17 | 2023-04-18 | Corning Incorporated | Transparent, near infrared-shielding glass ceramic |
US11046609B2 (en) | 2017-10-23 | 2021-06-29 | Corning Incorporated | Glass-ceramics and glasses |
US11643359B2 (en) | 2017-10-23 | 2023-05-09 | Corning Incorporated | Glass-ceramics and glasses |
US11746041B2 (en) | 2017-12-04 | 2023-09-05 | Corning Incorporated | Glass-ceramics and glass-ceramic articles with UV- and NIR-blocking characteristics |
US11312653B2 (en) | 2017-12-13 | 2022-04-26 | Corning Incorporated | Articles including glass and/or glass-ceramics and methods of making the same |
US11912609B2 (en) | 2017-12-13 | 2024-02-27 | Corning Incorporated | Articles including glass and/or glass-ceramics and methods of making the same |
US11351756B2 (en) | 2017-12-15 | 2022-06-07 | Corning Incorporated | Laminate glass ceramic articles with UV-and NIR-blocking characteristics and methods of making the same |
US11890833B2 (en) | 2017-12-15 | 2024-02-06 | Corning Incorporated | Laminate glass ceramic articles with UV-and NIR-blocking characteristics and methods of making the same |
WO2023285693A1 (en) * | 2021-07-16 | 2023-01-19 | Pemco Belgium Bv | Pyro light enamel coating |
Also Published As
Publication number | Publication date |
---|---|
AU2003214255A1 (en) | 2003-12-02 |
TWI264422B (en) | 2006-10-21 |
CN1653007A (zh) | 2005-08-10 |
TW200404048A (en) | 2004-03-16 |
US7517822B2 (en) | 2009-04-14 |
KR20050025182A (ko) | 2005-03-11 |
US20050151116A1 (en) | 2005-07-14 |
JP2005529048A (ja) | 2005-09-29 |
CN1307116C (zh) | 2007-03-28 |
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