EP1012873A1 - Long life halogen cycle incandescent lamp and glass envelope composition - Google Patents
Long life halogen cycle incandescent lamp and glass envelope compositionInfo
- Publication number
- EP1012873A1 EP1012873A1 EP98944815A EP98944815A EP1012873A1 EP 1012873 A1 EP1012873 A1 EP 1012873A1 EP 98944815 A EP98944815 A EP 98944815A EP 98944815 A EP98944815 A EP 98944815A EP 1012873 A1 EP1012873 A1 EP 1012873A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- glass
- lamp
- envelope
- cao
- mgo
- 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.)
- Withdrawn
Links
- 239000011521 glass Substances 0.000 title claims abstract description 53
- 229910052736 halogen Inorganic materials 0.000 title claims abstract description 34
- 150000002367 halogens Chemical class 0.000 title claims abstract description 27
- 239000000203 mixture Substances 0.000 title claims abstract description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 28
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 18
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 12
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 12
- 239000010937 tungsten Substances 0.000 claims abstract description 12
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 11
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 11
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 11
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 10
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 10
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000005359 alkaline earth aluminosilicate glass Substances 0.000 claims abstract description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 12
- 229910052794 bromium Inorganic materials 0.000 claims description 12
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 11
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 11
- 239000005354 aluminosilicate glass Substances 0.000 claims description 6
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims description 6
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 2
- 229910000272 alkali metal oxide Inorganic materials 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 239000002775 capsule Substances 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- -1 tungsten halide Chemical class 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 239000007795 chemical reaction product Substances 0.000 description 3
- 238000005056 compaction Methods 0.000 description 3
- 229910052743 krypton Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 description 2
- 239000005391 art glass Substances 0.000 description 2
- NKQIMNKPSDEDMO-UHFFFAOYSA-L barium bromide Chemical compound [Br-].[Br-].[Ba+2] NKQIMNKPSDEDMO-UHFFFAOYSA-L 0.000 description 2
- 229910001620 barium bromide Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 241001289141 Babr Species 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Inorganic materials [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 1
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- GZUXJHMPEANEGY-UHFFFAOYSA-N bromomethane Chemical compound BrC GZUXJHMPEANEGY-UHFFFAOYSA-N 0.000 description 1
- 239000003258 bubble free glass Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910001622 calcium bromide Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- WGEFECGEFUFIQW-UHFFFAOYSA-L calcium dibromide Chemical compound [Ca+2].[Br-].[Br-] WGEFECGEFUFIQW-UHFFFAOYSA-L 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000000779 depleting effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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
- 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
-
- 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
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
- C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
-
- 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
- C03C3/11—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/28—Envelopes; Vessels
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/50—Selection of substances for gas fillings; Specified pressure thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Definitions
- This invention relates to lamps and more particularly to incandescent halogen lamps. Still more particularly, it relates to a glass for the envelope of halogen lamps.
- tungsten-halogen lamps contain a non-reactive gas filling such as neon, nitrogen, argon, krypton or xenon or a combination thereof, together with a halogen, usually bromine, which combines with the evaporated tungsten escaping from the incandescent filament.
- a non-reactive gas filling such as neon, nitrogen, argon, krypton or xenon or a combination thereof
- a halogen usually bromine
- Such hard glasses such as the aluminosilicates, have been employed with tungsten halogen lamps with varying degrees of success.
- Such glasses include Corning Incorporated nos. 1720, 1724 and 1725; glass nos. 8252 and 8253 available from Schott; no. 180 available from General Electric.
- the 1720, 1724 and 8252 glasses have been used successfully with low voltage applications (i.e., 12v), such as automobile headlamps which operate with wall temperatures below 500°C; however, for line voltage applications, i.e., voltages greater than 85v, with wall temperatures much greater than 500°C, these glasses prove unusable due to an inability to maintain good seals. This condition has been attributed to a structural compaction of the glass during operation. The compacted glass results in stresses, which can exceed the breaking strength of the glass, ultimately rupturing the lamp seal.
- low voltage applications i.e., 12v
- line voltage applications i.e. 85v
- Other glasses such as 1725, 180, and 8253, which all have substantially higher glass strain points, while employable with the higher wall temperatures generated by reduced envelope size and greater voltages, i.e., voltages in excess of 85 volts, will not fail from compaction but ultimately from blackening caused by the tungsten deposition on the inner bulb wall and, subsequently, in a non-passive lamp failure, i.e., the lamp capsule explodes.
- lamp failure should be passive, i.e., by breakage of the filament.
- the halogen gas employed is either HBr or CH 3 Br.
- the concentration of the bromine (or other halogen) is critical for controlling the halogen cycle with tungsten.
- Yet another object of my invention is the provision of a glass for tungsten halogen lamps, which delivers the above results and yet remains economical to manufacture.
- a long life, halogen cycle, incandescent lamp for operation in excess of 85 volts which comprises: a transparent glass envelope having sealed therewithin a tungsten filament; a pair of electrical lead-ins connecting the filament and extending exteriorly of the envelope for connection to a supply voltage greater than 85 v; and a fill gas within the envelope including a halogen, at a pressure of at least three atmospheres.
- the envelope is constructed of an alkaline earth aluminosilicate glass having a composition consisting essentially of, in weight percent, from >58 to about 64% SiO 2 , from about 14 to about 17.5% Al O 3 ; from 0 to about 1% B 2 O 3 , from 1 to about 7% MgO, from about 5.5 to about 14% CaO, from about 6 to about 17% BaO, from 0 to about 8% SrO, and from 0 to about 1.5% ZrO 2 .
- Trace amounts of other compounds such as CeO 2 , or TiO 2 may be present in amounts less than 1 % by weight.
- the envelope is constructed of an aluminosilicate glass having a reduced affinity for halogens, comprising, in weight percent: from 59 to about 61% SiO 2 , from about 15.3 to about 17.2% Al 2 O 3 ; from about 0.3 to about 0.5% B 2 O 3 from 1 to about 6.5% MgO, from about 5.9 to about 13.5% CaO, from about >6.5 to about 9.5% BaO, from 0 to about 8% SrO, from about 0.05 to about 1% Zr0 2 , from about 0 to about 0.3% CeO 2 , and from about 0 to about 0.5% TiO 2 .
- aluminosilicate glass having a reduced affinity for halogens, comprising, in weight percent: from 59 to about 61% SiO 2 , from about 15.3 to about 17.2% Al 2 O 3 ; from about 0.3 to about 0.5% B 2 O 3 from 1 to about 6.5% MgO, from about 5.9 to about 13.5% CaO, from about >6.5 to about 9.5% BaO, from
- the single figure is a cross-sectional view of a tungsten halogen lamp employing the invention.
- a lamp 30 having a longitudinal axis L and comprising an outer envelope 32 and an inner envelope 34, frame assembly 36, and a base 38.
- the outer envelope 32 has a neck portion 40.
- the inner envelope 34 is a tungsten halogen incandescent capsule with a filament 45 therein having electrical lead-ins 42 and 44 connected thereto and extending exteriorly of the body 34 for connection to a source of supply voltage greater than 85v.
- the capsule 34 in this instance is mounted upon a frame 36.
- the capsule 34 is constructed of the glass of this invention and contains a gaseous fill comprised of an inert gas and a halogen.
- the fill comprises 95 % Kr, about 5% N 2 and 0.10 % HBr and is at a pressure of 3-8 atmospheres.
- the aluminosilicate glass of capsule 34 consists essentially of, in weight percent, from >58 to about 64% SiO 2 , from about 14 to about 17.5% Al 2 O 3 , from 0 to about 1% B 2 O 3 , from about 1 to about 7% MgO, from about 5.5 to about 14% CaO, from about 6 to about 17% BaO, from 0 to about 8% SrO, and from 0 to about 1.5% ZrO 2 .
- the boron oxide and the zirconium oxide would be eliminated as they have no known effect on lamp operation; however, minor amounts may be necessary to aid in the melting process.
- the quartz reaction vessel was evacuated, backfilled with a gas consisting of about 80% Kr, 19% N and 1% HBr at a pressure of 1 atmosphere, and sealed.
- the reaction vessel was placed in an isothermal portion of an oven and heated at 610°C for 500 hours. After cooling, the reaction vessel was opened, the test glass tubing removed, stoppered at one end and filled with deionized water. The opposite end was then stoppered and the capsule tubing were heated to 100°C for one hour to dissolve the water soluble reaction products formed on the inner surfaces of the capsule cylinders.
- the water content of each of the capsule tubes was then analyzed for bromine, calcium, magnesium, barium, strontium (one of the glass samples had a small amount of CaO replaced by SrO), and sodium. The results are shown in Table II.
- Alkali-poor variants were used each time for the production of the example glasses, such as quartz sand, aluminum oxide, magnesium carbonate, calcium carbonate and barium carbonate, as well as zirconium sand. If desired, cerium oxide and barium bromide can be added.
- the well-homogenized mixtures were melted in the laboratory in a Pt/Rh crucible at 1600 - 1650°C, refined and homogenized. The glass was drawn perpendicularly in a laboratory pulling device. The glasses were free of disruptive small crystals.
- Table III shows an example of a glass (A5) according to an aspect of the invention as well as a comparative example (VI) with their compositions (in wt.% based on the oxides) and their essential properties.
- the reboil temperature is indicated, along with the transformation temperature (T g ).
- the reboil temperature is the temperature at which a visually bubble-free glass sample at room temperature suddenly shows bubble formation at the interface with a metal (sample holder, Mo) when the temperature is increased. The higher this reboil temperature lies, the less the glass tends toward bubble formation when sealed to Mo.
- the upper cooling point (UCP) is indicated in place of T g .
- Tungsten-halogen lamps with high power were prepared from glass tubes in the usual way for a lamp test. These were subjected to a continuous operation at a bulb temperature of 700°C. The time period prior to the beginning of blackening on the inside of the glass bulb was determined. The value for A5 is also sufficiently good. In the case of VI, a bulb bulging occurred.
- the sum of the alkaline-earth oxides (RO) not be below 21 wt.% nor above 24 wt.%. Outside of these ranges both the thermal expansion and the viscosity have been found to deviate from the desired values.
- the weight ratio between the sum of CaO, SrO and MgO, on the one hand, and BaO on the other hand shall amount to between 1.45 and 1.75. Preferably, it amounts to between 1.65 and 1.75.
- MgO/CaO the weight ratio of MgO to CaO is important; therefore, MgO/CaO will be always be greater than 0 and, preferably, less than about 0.8; otherwise, the crystallization stability of the glass would not be adequate for tube pulling.
- this invention a five component alumino-silicate system (SiO 2 , Al 2 O 3 , BaO, CaO, MgO) with distinct advantages over the prior art, namely in its lack of bromine reaction products at the inner surface of a lamp operating under the halogen cycle, thereby permitting longer operation with better maintenance. Additionally, nonpassive failures are reduced or eliminated as the lamp burns cleanly until a normal end of life is achieved.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10005570A EP2236470B1 (en) | 1997-09-12 | 1998-09-10 | Long life halogen cycle incandescent lamp and glass envelope composition |
EP11005451A EP2374765A1 (en) | 1997-09-12 | 1998-09-10 | Long life halogen cycle incandescent lamp and glass envelope compoistion |
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US5871297P | 1997-09-12 | 1997-09-12 | |
US58712P | 1997-09-12 | ||
US94856597A | 1997-10-10 | 1997-10-10 | |
US948565 | 1997-10-10 | ||
DE1997147355 DE19747355C1 (en) | 1997-10-27 | 1997-10-27 | Long-life halogen cycle lamp operating at above 85 volts |
DE19747355 | 1997-10-27 | ||
PCT/US1998/018745 WO1999014794A1 (en) | 1997-09-12 | 1998-09-10 | Long life halogen cycle incandescent lamp and glass envelope composition |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1012873A1 true EP1012873A1 (en) | 2000-06-28 |
EP1012873A4 EP1012873A4 (en) | 2009-04-08 |
Family
ID=27217862
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11005451A Withdrawn EP2374765A1 (en) | 1997-09-12 | 1998-09-10 | Long life halogen cycle incandescent lamp and glass envelope compoistion |
EP10005570A Expired - Lifetime EP2236470B1 (en) | 1997-09-12 | 1998-09-10 | Long life halogen cycle incandescent lamp and glass envelope composition |
EP98944815A Withdrawn EP1012873A4 (en) | 1997-09-12 | 1998-09-10 | Long life halogen cycle incandescent lamp and glass envelope composition |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11005451A Withdrawn EP2374765A1 (en) | 1997-09-12 | 1998-09-10 | Long life halogen cycle incandescent lamp and glass envelope compoistion |
EP10005570A Expired - Lifetime EP2236470B1 (en) | 1997-09-12 | 1998-09-10 | Long life halogen cycle incandescent lamp and glass envelope composition |
Country Status (7)
Country | Link |
---|---|
EP (3) | EP2374765A1 (en) |
JP (1) | JP4323091B2 (en) |
CN (1) | CN1316555C (en) |
AU (1) | AU9226598A (en) |
CA (2) | CA2625915C (en) |
HK (1) | HK1031950A1 (en) |
WO (1) | WO1999014794A1 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6069100A (en) * | 1997-10-27 | 2000-05-30 | Schott Glas | Glass for lamb bulbs capable of withstanding high temperatures |
DE10006305C2 (en) * | 2000-02-12 | 2002-08-01 | Schott Rohrglas Gmbh | Glass with high thermal resistance for lamp bulbs and its use |
DE10022769A1 (en) | 2000-05-05 | 2001-11-08 | Telux Lampenrohr Gmbh | Alumino-alkaline earth silicate glass used for bulbs in tungsten halogen glow lamps has a low water content |
DE10034985C1 (en) † | 2000-07-19 | 2001-09-06 | Schott Glas | Production of an alkali-free aluminosilicate glass used as a substrate glass for displays comprises adding tin oxide as refining agent to the starting materials, melting the glass and hot molding the glass |
US6653782B2 (en) * | 2001-12-27 | 2003-11-25 | Koninklijke Philips Electronics N.V. | Fuse and safety switch for halogen incandescent lamps |
DE10204149C1 (en) | 2002-02-01 | 2003-07-10 | Schott Glas | Alkaline earth aluminosilicate glass for lamp bulbs contains oxides of silicon, aluminum, boron, magnesium, calcium, strontium, barium, zirconium, cerium, titanium, cobalt and iron |
DE10204150A1 (en) * | 2002-02-01 | 2003-08-14 | Schott Glas | Alkaline earth aluminosilicate glass and use |
DE102004044364A1 (en) * | 2004-09-10 | 2006-03-16 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Halogen filament lamp/bulb for medium/high voltage ranges has a bulb with a lighting unit inside and a supply of current running through a nipping seal for sealing the bulb |
CN101080804B (en) * | 2005-01-04 | 2012-03-28 | 肖特股份公司 | Glass for luminous device having externally arranged electrodes |
DE102005012487A1 (en) * | 2005-03-16 | 2006-09-21 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | halogen bulb |
TWI570086B (en) * | 2010-11-08 | 2017-02-11 | 日本電氣硝子股份有限公司 | Alkali free glass |
TWI702196B (en) | 2014-10-23 | 2020-08-21 | 日商Agc股份有限公司 | Alkali-free glass |
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US3961970A (en) * | 1975-04-21 | 1976-06-08 | Corning Glass Works | Reed switch construction |
US3978362A (en) * | 1975-08-07 | 1976-08-31 | Corning Glass Works | Glass envelope for tungsten-bromine lamp |
US4015158A (en) * | 1974-08-30 | 1977-03-29 | General Electric Company | Bromine lamp with molybdenum parts |
US4255198A (en) * | 1979-11-09 | 1981-03-10 | Corning Glass Works | Glass for sealing to molybdenum metal |
US4298388A (en) * | 1979-10-11 | 1981-11-03 | Jenaer Glaswerk Schott & Gen. | Alkali-free sealing glasses for molybdenum |
US4409337A (en) * | 1982-11-12 | 1983-10-11 | Corning Glass Works | Glass envelopes for tungsten-halogen lamps |
EP0261819A1 (en) * | 1986-09-08 | 1988-03-30 | Corning Glass Works | Molybdenum sealing glasses |
US4737685A (en) * | 1986-11-17 | 1988-04-12 | General Electric Company | Seal glass composition |
EP0638526A1 (en) * | 1993-07-30 | 1995-02-15 | Schott Glaswerke | Fire-proof safety glass |
US5473226A (en) * | 1993-11-16 | 1995-12-05 | Osram Sylvania Inc. | Incandescent lamp having hardglass envelope with internal barrier layer |
US5489558A (en) * | 1994-03-14 | 1996-02-06 | Corning Incorporated | Glasses for flat panel display |
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Publication number | Priority date | Publication date | Assignee | Title |
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US5508237A (en) * | 1994-03-14 | 1996-04-16 | Corning Incorporated | Flat panel display |
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1998
- 1998-09-10 JP JP2000512238A patent/JP4323091B2/en not_active Expired - Lifetime
- 1998-09-10 AU AU92265/98A patent/AU9226598A/en not_active Abandoned
- 1998-09-10 EP EP11005451A patent/EP2374765A1/en not_active Withdrawn
- 1998-09-10 CA CA002625915A patent/CA2625915C/en not_active Expired - Lifetime
- 1998-09-10 EP EP10005570A patent/EP2236470B1/en not_active Expired - Lifetime
- 1998-09-10 EP EP98944815A patent/EP1012873A4/en not_active Withdrawn
- 1998-09-10 WO PCT/US1998/018745 patent/WO1999014794A1/en active IP Right Grant
- 1998-09-10 CN CNB988089084A patent/CN1316555C/en not_active Expired - Lifetime
- 1998-09-10 CA CA002301579A patent/CA2301579C/en not_active Expired - Lifetime
-
2001
- 2001-04-03 HK HK01102401A patent/HK1031950A1/en not_active IP Right Cessation
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US4015158A (en) * | 1974-08-30 | 1977-03-29 | General Electric Company | Bromine lamp with molybdenum parts |
US3961970A (en) * | 1975-04-21 | 1976-06-08 | Corning Glass Works | Reed switch construction |
US3978362A (en) * | 1975-08-07 | 1976-08-31 | Corning Glass Works | Glass envelope for tungsten-bromine lamp |
US4298388A (en) * | 1979-10-11 | 1981-11-03 | Jenaer Glaswerk Schott & Gen. | Alkali-free sealing glasses for molybdenum |
US4255198A (en) * | 1979-11-09 | 1981-03-10 | Corning Glass Works | Glass for sealing to molybdenum metal |
US4409337A (en) * | 1982-11-12 | 1983-10-11 | Corning Glass Works | Glass envelopes for tungsten-halogen lamps |
EP0261819A1 (en) * | 1986-09-08 | 1988-03-30 | Corning Glass Works | Molybdenum sealing glasses |
US4737685A (en) * | 1986-11-17 | 1988-04-12 | General Electric Company | Seal glass composition |
EP0638526A1 (en) * | 1993-07-30 | 1995-02-15 | Schott Glaswerke | Fire-proof safety glass |
US5473226A (en) * | 1993-11-16 | 1995-12-05 | Osram Sylvania Inc. | Incandescent lamp having hardglass envelope with internal barrier layer |
US5489558A (en) * | 1994-03-14 | 1996-02-06 | Corning Incorporated | Glasses for flat panel display |
Non-Patent Citations (1)
Title |
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See also references of WO9914794A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA2625915C (en) | 2009-06-23 |
EP2374765A1 (en) | 2011-10-12 |
EP2236470B1 (en) | 2011-11-09 |
CA2625915A1 (en) | 1999-03-25 |
JP2001516952A (en) | 2001-10-02 |
AU9226598A (en) | 1999-04-05 |
CA2301579C (en) | 2008-12-02 |
EP2236470A1 (en) | 2010-10-06 |
WO1999014794A9 (en) | 2005-08-18 |
EP1012873A4 (en) | 2009-04-08 |
CA2301579A1 (en) | 1999-03-25 |
CN1269910A (en) | 2000-10-11 |
HK1031950A1 (en) | 2001-06-29 |
WO1999014794A1 (en) | 1999-03-25 |
CN1316555C (en) | 2007-05-16 |
JP4323091B2 (en) | 2009-09-02 |
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