WO2007086441A1 - Procede de fabrication d'une composition de verre pour lampe, composition et lampe - Google Patents

Procede de fabrication d'une composition de verre pour lampe, composition et lampe Download PDF

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Publication number
WO2007086441A1
WO2007086441A1 PCT/JP2007/051106 JP2007051106W WO2007086441A1 WO 2007086441 A1 WO2007086441 A1 WO 2007086441A1 JP 2007051106 W JP2007051106 W JP 2007051106W WO 2007086441 A1 WO2007086441 A1 WO 2007086441A1
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WO
WIPO (PCT)
Prior art keywords
lamp
glass
glass composition
mol
hydroxide
Prior art date
Application number
PCT/JP2007/051106
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English (en)
Japanese (ja)
Inventor
Atsushi Motoya
Yasurou Niguma
Original Assignee
Matsushita Electric Industrial Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Priority to JP2007555984A priority Critical patent/JPWO2007086441A1/ja
Publication of WO2007086441A1 publication Critical patent/WO2007086441A1/fr

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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
    • 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
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/245—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps
    • H01J9/247—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps specially adapted for gas-discharge lamps

Definitions

  • the present invention relates to a method for producing a glass composition for lamps, a glass composition for lamps produced using this method, and a lamp produced using this glass composition for lamps.
  • a fluorescent lamp is used as a light source in a backlight of a transmissive liquid crystal display element such as a liquid crystal TV or a personal computer display.
  • the fluorescent lamp for backlight has basically the same configuration as the fluorescent lamp for general illumination, but the tube diameter of the glass bulb is smaller and the wall thickness is thinner. Therefore, such fluorescent lamps for backlight use borosilicate hard glass (hereinafter simply referred to as “borosilicate glass”) having high mechanical strength and excellent electrical insulation.
  • arsenic antimony is an environmentally hazardous substance that adversely affects the environment. Therefore, glass with arsenic antimony added is not suitable for recycling. In addition, arsenic and antimony-added glass must be handled with care in manufacturing and disposal plants, and requires extensive facilities for detoxification of etching wastewater.
  • Patent Document 1 contains SO, CI, and F as fining agents.
  • a method for producing glass in which an effective amount of a salt is added is disclosed. With this method, it is possible to obtain a glass with less bubbles without adding an environmental load substance. It is also known that a clarification effect can be obtained by adding nitrates such as Na NO and KNO to the glass.
  • Patent Document 1 Japanese Unexamined Patent Application Publication No. 2004-284949 Disclosure of the invention
  • Patent Document 1 generates a gas harmful to the human body such as a sulfide-based gas or a halogen-based gas during the glass melting step. Such harmful gas generation is preferable because it deteriorates the working environment of glass production.
  • NOx nitric acid gas
  • a method for producing a glass composition for a lamp according to an embodiment of the present invention is such that an oxide of a predetermined element and a hydroxide of the predetermined element are oxide / hydroxide.
  • a melting step of melting a raw material mixture added at a molar ratio of 1/3 to 1 into a glass state, and in the melting step, H 0 or H Heating the raw material mixture so that a gas comprising at least one of the above is generated is a special number.
  • a glass composition for a lamp according to an embodiment of the present invention is a glass composition for a lamp produced by the above-described method for producing a glass composition for a lamp, and transmits infrared light in the wavelength region near 3620 cm- 1 . It is characterized by a minimum value of 3.0 to 4.5% at a sample thickness of 2 mm.
  • a lamp according to an embodiment of the present invention is characterized by including a glass bulb formed of the above glass composition for a lamp.
  • a method for producing a glass composition for a lamp according to the present invention comprises the steps of: Since a gas composed of at least one of HO and H is generated from the hydroxide, it has the effect of being able to produce glass with few bubbles without generating harmful gas. The effect will be described in detail below.
  • the present inventors have replaced a part of the oxide of the predetermined element added to the raw material mixture with the hydroxide of the predetermined element, thereby melting the raw material mixture into a glass state.
  • gas was generated from the hydroxide, and bubbles in the glass melt were removed by the gas, and a clarification effect was obtained.
  • the gas generated from the hydroxide is generated by a decomposition reaction of the hydroxide and consists of at least one of H 0 and H. Temperature range where the vitrification reaction starts 500
  • a clarification effect is obtained by the decomposition reaction of the hydroxide occurring at ⁇ 1000 ° C.
  • the bubbles present in the glass are those in which the gas such as CO generated when the raw material mixture melts into the glass state remains without being able to escape from the glass melt.
  • the gas such as CO generated when the raw material mixture melts into the glass state remains without being able to escape from the glass melt.
  • the CO bubbles are small in diameter, have a low buoyancy, and are difficult to lift from the glass melt, so they cannot easily escape from the glass melt and remain in the glass.
  • the glass for a lamp according to the present invention generates H 0 or H force gas from the hydroxide of a predetermined element. This H 0 or H
  • the present inventors set the mixing ratio of the oxide and the hydroxide in the range of 1/3 to 1, thereby causing re-foaming while obtaining a sufficient clarification effect. Can be difficult I found out.
  • the mixing ratio When the mixing ratio is large, the clarification effect is insufficient because the generation amount of H 0 or H force gas is small. On the other hand, if the mixing ratio is less than 1/3, re-foaming is likely to occur during heat processing, which is not suitable for lamps.
  • the predetermined element boron (B), aluminum (A1), calcium (Ca), and the like are conceivable.
  • the hydroxide of the predetermined element is H BO, Al (OH), respectively.
  • the hydroxide according to the present invention includes a hydroxide in a narrow sense, that is, a compound having a hydrogen element and an oxygen element in a broad sense that includes only a compound having a hydroxyl group.
  • a hydroxide in a narrow sense that is, a compound having a hydrogen element and an oxygen element in a broad sense that includes only a compound having a hydroxyl group.
  • H BO B
  • the oxide and the hydroxide have a content of the predetermined element in the glass composition for a lamp of 8 to 17 mol% in terms of oxide.
  • the method for producing a glass composition for a lamp according to the present invention is such that the hydroxide has a content of the predetermined element in the glass composition for a lamp of 5 to 10.5 mol% in terms of oxide.
  • the hydroxide has a content of the predetermined element in the glass composition for a lamp of 5 to 10.5 mol% in terms of oxide.
  • the clarification effect is particularly remarkable.
  • H BO which is a hydroxide of boron, decomposes in a wide temperature range of 300 to 800 ° C.
  • the decomposition reaction of HBO is represented by the following (formula 1) and (formula 2).
  • the use of inexpensive HBO has the effect that glass can be produced at a low cost, and HBO has the effect that even if a large amount of glass is added, the glass is not colored.
  • the borosilicate glass is a glass having a high Young's modulus and Vickers hardness and excellent mechanical strength, and specifically, a glass containing 6 to 20 mol% of B 0 in terms of oxide. Means.
  • Lamp glass composition according to the present invention the thermal expansion coefficient (a) is 34 X 10- 7 / K ⁇ 43 X 1
  • a knocklight lamp uses a lead wire made of tungsten or Kovar alloy that can withstand the high temperatures caused by discharge. Therefore, in order to increase the reliability of the hermetic seal of the lead-in wire, it is preferable to make the thermal expansion coefficient of the glass composition for lamps close to the thermal expansion coefficient of tungsten or Kovar alloy.
  • thermal expansion coefficient (alpha) is 34 X 10- 7 / ⁇ 43 X 10- 7 / ⁇ , about the same as the thermal expansion coefficient of tungsten feedthrough, because high chemical durability, The reliability of the airtight seal of the lead-in line is high.
  • thermal expansion coefficient (a) is 43 X 10- 7 / K ⁇ 55 X 10- 7 / ⁇ , about the same as the thermal expansion coefficient of Kovar alloy feedthrough, because high chemical resistance, lead- High reliability of hermetic seal.
  • the lamp according to the present invention includes a glass bulb formed from the above glass composition for a lamp. Therefore, the lamp with few bubbles in the glass of the glass bulb is hardly damaged.
  • FIG. 1 shows the composition and properties of a glass composition according to an embodiment of the present invention.
  • FIG. 2 is a schematic view showing a main configuration of a cold cathode fluorescent lamp according to an embodiment of the present invention.
  • FIG. 3 shows the composition and properties of a glass composition according to a comparative example.
  • FIG. 4 shows the infrared transmittance of a glass composition according to one embodiment of the present invention in the range of 2800 cm- 1 to 3800 cm- 1 .
  • FIG. 5 shows the infrared transmittance of a glass composition according to one embodiment of the present invention in the range of 3600 cm- 1 to 3800 cm- 1 .
  • a glass composition for a lamp, a method for producing the glass composition for a lamp, and a lamp according to an embodiment of the present invention will be described with reference to the drawings.
  • composition of the glass composition according to the present embodiment is as shown in Examples 1 to 5 in FIG. Note that “%” in FIG. 1 means “mol%”.
  • composition of the glass composition according to the present invention is not limited to the compositions shown in Examples 1 to 5, but in order to maintain the characteristics as a glass composition for a lamp, it is substantially converted in terms of oxide. , Si 0: 55 to 75 mol%, Al O: l to 10 mol%, BO + H BO: 8 to 17 mol%, Li O + Na O + KO: 0 to 12
  • boron (B) contained in the glass composition is added to the raw material mixture as a boron oxide and added to the raw material mixture as a boron hydroxide.
  • B 0 is used for those added as oxides
  • H BO is used for those added as hydroxides.
  • FIG. 1 and FIG. 3 described later.
  • B 0 + H BO The meaning described as 8 to 17 mol% means the glass composition
  • the reason for determining the glass composition for a lamp of the present invention as described above is as follows.
  • SiO is a component that forms a glass skeleton, and its content ranges from 55 to 75 mol%.
  • A10 is a component added for the purpose of improving the weather resistance and devitrification of glass.
  • the content is preferably in the range of l ⁇ 10mol%. If the amount is less than lmol%, the above action is difficult to obtain. On the other hand, if it exceeds 10 mol%, the meltability of the glass deteriorates. Its content is particularly preferably 2-7 mol%.
  • BO is an essential component of this embodiment, which is added for the purpose of improving the meltability of the glass, adjusting the expansion coefficient, and adjusting the viscosity.
  • HBO is an essential component of the present embodiment, which is added for the purpose of improving the meltability of glass, adjusting the expansion coefficient, adjusting the viscosity, and promoting the clarification effect.
  • B 0 + H BO is preferably in the range of 8-17 mol%.
  • B 0 + H BO force Less than S8 mol%, the melting property of the glass deteriorates, the viscosity and expansion coefficient increase, and it becomes difficult to seal the lead-in wire. On the other hand, if it exceeds 17 mol%, the glass undergoes phase separation, making it difficult to produce the glass.
  • the total content is particularly preferably 10 to 16 mol%.
  • Li 0, Na 2 O and K 2 alkali metal oxides reduce the viscosity of the glass and
  • the content is preferably in the range of 0 to 10 mol%. If it exceeds 10 mol%, the thermal expansion coefficient of the glass becomes too large. In addition, since alkali components are easily eluted from the glass, when a fluorescent lamp is produced using the glass, the glass reacts with the phosphor or mercury to reduce the luminous flux of the fluorescent lamp.
  • the content of each component is preferably Li 2 O: 0 to 5 mol%, Na 2 O: 0 to 8 mol%, and K 0: 0 to 12 mol%.
  • Alkaline earth metal oxides of MgO and CaO are added for the purpose of improving electrical insulation and chemical durability.
  • the MgO content is preferably in the range of 0.5 to 5 mol%.
  • the CaO content is preferably in the range of 0.5 to 10 mol%. If the MgO force is less than S0.5 mol% or CaO is less than 0.5 mol%, the above objective may not be achieved. On the other hand, when MgO is more than 5 mol% or CaO is more than 10 mol%, the glass tends to devitrify.
  • SrO and BaO are added for the purpose of improving the meltability of the glass and the bulb processability during the production of the fluorescent lamp.
  • the content of SrO is preferably 0 to 8 mol%.
  • the content of BaO is preferably 0 to 10 mol%. If SrO is more than 8 mol% or BaO is more than lOmol%, the glass tends to devitrify. CeO is added for the purpose of effectively absorbing ultraviolet rays and suppressing solarization. Its content is preferably in the range of 0.01 to 2 mol%. If the amount is less than 0.01 mol%, the above-mentioned purpose cannot be achieved. If the amount is more than 2 mol%, the glass is devitrified, making it difficult to produce a fluorescent lamp having a desired lamp luminous flux. Its content is particularly preferably in the range of 0.01 to lmol%.
  • Fe 0 is added for the purpose of obtaining an ultraviolet absorption effect.
  • the content is preferably in the range of 0 to 0.2 mol%. If it exceeds 0.2 mol%, the transmittance in the visible region is lowered, and therefore the luminous flux of the fluorescent lamp is lowered.
  • SnO is added for the purpose of promoting the valence change of Ce ions from 4+ to 3+. Its content is preferably in the range of 0.01-5 mol%. If the amount is less than 0.01 mol%, the effect cannot be obtained. If the amount is more than 5 mol%, the mechanical strength of the glass decreases, and the yield decreases in the glass tube drawing process. The range of 0.1 to 3 mol% is particularly preferable.
  • the glass according to the present invention may contain other components as long as the content of each component is substantially within the above range as long as the composition does not deviate from the above range. Les.
  • other components include ZrO, ZnO, P 2 O, TiO, and WO.
  • CeO is known as one of the fining agents.
  • a clarification effect cannot be obtained unless a large amount of CeO is added.
  • a large amount is added to obtain a clarification effect, the problem of coloring the glass occurs. Therefore, even if only CeO is added as a clarifier
  • SnO is the same as CeO, which is known as one of the fining agents, and if it is not added in a large amount, the fining effect cannot be obtained. However, if a large amount is added to obtain a clarification effect, the problem of devitrification of the glass occurs. For this reason, even if SnO is added as a clarifier, it is difficult to produce a glass with no devitrification and few remaining bubbles.
  • a plurality of types of glass raw materials are prepared within the range of the composition of the glass composition for a lamp according to the present invention to obtain a raw material mixture.
  • the raw material mixture is put into a glass melting furnace and melted at 1500 to 1600 ° C. for 5 to 8 hours in an air atmosphere to obtain a glass melt. At that time, do not perform stirring or publishing. Absent.
  • the glass melt is formed into a tubular shape by a tube drawing method such as the Danner method and cut into a predetermined size to obtain a glass tube for a lamp.
  • the glass tube is heat-processed to produce a glass bulb, and various lamps are produced.
  • FIG. 2 is a schematic diagram showing a main configuration of the cold cathode fluorescent lamp according to the present embodiment.
  • the structure of the cold cathode fluorescent lamp 1 basically conforms to the structure of the cold cathode fluorescent lamp according to the prior art.
  • the glass bulb 2 of the cold cathode fluorescent lamp 1 is formed of the glass composition for a lamp according to the present embodiment, and has an outer diameter of about 4.0 mm, an inner diameter of about 3.0 mm, The length is about 730mm.
  • the outer diameter, inner diameter and overall length of the glass bulb 2 are not limited to the above, but the outer diameter of the glass bulb 2 for the cold cathode fluorescent lamp 1 is 1.8 because it is desired that the tube diameter is small and the wall thickness is thin.
  • the inner diameter is preferably 1.4;) to 6.0 (the inner diameter is 5.0) mm.
  • Both ends of the glass bulb 2 are hermetically sealed by the bead glass 3, respectively.
  • lead wires 4 made of tungsten metal or Kovar alloy and having a diameter of about 0.8 mm are hermetically sealed so as to penetrate the bead glass 3.
  • a nickel or niobium cup-shaped electrode 5 whose surface is coated with an electron radioactive substance is attached to the end of each lead-in wire 4 on the inner side of the glass bulb 2.
  • a rare earth phosphor (Y 0: Eu 3+ , LaPO: Ce 3+ , Tb 3+ , BaMg Al 2 O 3 ) mixed with red, green and blue-green phosphors. : Eu 2+ , Mn 2+ )
  • a phosphor layer 6 is formed.
  • the glass bulb 2 is filled with 0.8 to 2.5 mg of mercury (not shown) and a rare gas (not shown) such as xenon.
  • the straight tube type cold cathode fluorescent lamp 1 has been specifically described above based on the embodiment, the content of the present invention is not limited to the above embodiment.
  • Each glass composition is prepared by weighing 17 g of the raw material mixture adjusted to the composition shown in the figure, placing it in a platinum crucible, heating and melting at 1500 ° C. for 3 hours in an electric furnace, and then taking it out from the electric furnace. The bottom was brought into contact with cold water and quenched to peel off the interface between the glass and the crucible.
  • thermomechanical analyzer manufactured by Rigaku, model number: TAS300 T MA8140C was used to measure the average linear expansion coefficient in the temperature range of 30 to 380 ° C.
  • the number of bubbles was counted using image processing software for the number of bubbles confirmed in the central section of the glass composition at 120 mm 2 and the plate thickness of 3 mm. Only bubbles with a diameter of 30 ⁇ or more were counted as bubbles.
  • the number of bubbles was cut into 120mm 2 (longitudinal lOmm x width 12mm) and plate thickness 3mm at the center of the cross section of the glass composition, and then both sides of the glass were # 400, # 800, # 1000, # 1500, # 2000 Polished step by step, finished to a mirror surface, and made a glass sumnoire.
  • the number of bubbles confirmed in the glass sample was counted using image processing software. Only bubbles with a diameter of 30 ⁇ or more were counted as bubbles.
  • Re-foaming during heat processing is when the glass composition is heat-processed and bubbles with a diameter of 30 / m or more in the overheated part are judged as “X” with re-foaming, and no re-foaming has occurred. Was determined to be “ ⁇ ”.
  • the infrared transmittance was measured in a wavelength range of 2800 to 3800 cm- 1 using a FT-IR (FTIR-8200, manufactured by Shimadzu Corporation) for a glass composition having a sample thickness of 2 mm and mirror polished on both sides. .
  • FT-IR FTIR-8200, manufactured by Shimadzu Corporation
  • the glass bulb was softened at a temperature of the glass bulb softening point + 20 ° C for 3 hours to soften the bulb to produce a glass plate having a thickness of 2 mm.
  • the glass plate is then cut into a 15mm x 15mm square, 15mm x 15mm x 2mm thick
  • Both surfaces of the sample for evaluation were polished step by step to # 400, # 800, # 1000, # 1500, and # 2 000, and finished to a mirror surface.
  • Fig. 4 shows the measurement results.
  • the infrared transmittance was performed for the purpose of evaluating the amount of water remaining in the glass composition.
  • the water remaining in the glass composition is generated by the decomposition reaction of HBO, and a part of it is dissolved in the glass composition. If the amount of water dissolved in the glass composition is large, the water dissolved when the glass composition is heated is gasified and re-foaming occurs.
  • the amount of water in the glass composition can be confirmed by the minimum value of infrared transmittance in the vicinity of 3620 cm- 1 , that is, the size of the absorption peak of OH— confirmed in the vicinity of 3620 cm- 1 .
  • the smaller the minimum value of the infrared transmittance in the vicinity of 3620 cm- 1 the greater the amount of water remaining in the glass composition.
  • 3620Cm- 1 to facilitate Verify minimum value of the infrared transmittance near is an enlarged view of a measurement result of the infrared transmittance in the wavelength range of 3600c m- 1 ⁇ 3800cm- 1.
  • the method for producing a glass composition for a lamp, the glass composition for a lamp and a lamp according to the present invention can be widely used for all lamps.
  • it is suitable for backlight cold cathode fluorescent lamps of transmissive liquid crystal display elements that require high-quality display such as liquid crystal TVs, personal computer displays, and in-vehicle liquid crystal panels.
  • the method for producing a glass composition for a lamp, the glass composition for a lamp, and the lamp according to the present invention substantially do not contain environmentally hazardous substances such as arsenic, antimony, lead, etc.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)
  • Glass Melting And Manufacturing (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

L'invention concerne un procédé de fabrication d'une composition de verre pour lampes, ledit procédé comprenant une étape de fusion lors de laquelle un mélange de matières premières contenant un oxyde d'un élément donné et un hydroxyde de l'élément donné dans une proportion oxyde/hydroxyde comprise entre 1/3 et 1 par moles est fondu et amené à un état vitreux. Lors de l'étape de fusion, le mélange de matières premières est chauffé de manière à ce que l'hydroxyde subisse une réaction de décomposition pour générer un gaz comprenant au moins soit H2O, soit H2. Un verre présentant une proportion réduite d'inclusions de bulles peut ainsi être produit sans générer de gaz nocif.
PCT/JP2007/051106 2006-01-30 2007-01-24 Procede de fabrication d'une composition de verre pour lampe, composition et lampe WO2007086441A1 (fr)

Priority Applications (1)

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JP2007555984A JPWO2007086441A1 (ja) 2006-01-30 2007-01-24 ランプ用ガラス組成物の製造方法、ランプ用ガラス組成物およびランプ

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JP2006-021252 2006-01-30
JP2006021252 2006-01-30

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JP2009084073A (ja) * 2007-09-27 2009-04-23 Asahi Glass Co Ltd ガラスの製造方法
JP2011195449A (ja) * 2007-08-03 2011-10-06 Nippon Electric Glass Co Ltd 強化ガラス基板及びその製造方法
JP2012092000A (ja) * 2010-09-28 2012-05-17 Nippon Electric Glass Co Ltd 硼珪酸ガラスの製造方法
JP2012197226A (ja) * 2008-02-26 2012-10-18 Corning Inc ケイ酸塩ガラス用の清澄剤
WO2016088778A1 (fr) * 2014-12-02 2016-06-09 旭硝子株式会社 Plaque de verre et dispositif de chauffage l'utilisant
JP2017048092A (ja) * 2015-09-03 2017-03-09 日本電気硝子株式会社 医薬容器用ホウケイ酸ガラス
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CN104140205A (zh) * 2014-07-31 2014-11-12 安徽力华光电玻璃科技有限公司 一种高透明度的高硼硅玻璃管制备方法

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JP2001076336A (ja) * 1999-09-08 2001-03-23 Hoya Corp 情報記録媒体用ガラス基板およびそれを用いた情報記録媒体
JP2002068775A (ja) * 2000-08-30 2002-03-08 Asahi Techno Glass Corp 照明用ガラス外囲器

Cited By (16)

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JP2011195449A (ja) * 2007-08-03 2011-10-06 Nippon Electric Glass Co Ltd 強化ガラス基板及びその製造方法
JP2011241143A (ja) * 2007-08-03 2011-12-01 Nippon Electric Glass Co Ltd 強化ガラス基板及びその製造方法
US8168295B2 (en) 2007-08-03 2012-05-01 Nippon Electric Glass Co., Ltd. Tempered glass substrate and method of producing the same
US8679631B2 (en) 2007-08-03 2014-03-25 Nippon Electric Glass Co., Ltd. Tempered glass substrate and method of producing the same
US9034469B2 (en) 2007-08-03 2015-05-19 Nippon Electric Glass Co., Ltd. Tempered glass substrate and method of producing the same
US9054250B2 (en) 2007-08-03 2015-06-09 Nippon Electric Glass Co., Ltd Tempered glass substrate and method of producing the same
US9299869B2 (en) 2007-08-03 2016-03-29 Nippon Electric Glass Co., Ltd. Tempered glass substrate and method of producing the same
JP2009084073A (ja) * 2007-09-27 2009-04-23 Asahi Glass Co Ltd ガラスの製造方法
US10040715B2 (en) 2008-02-26 2018-08-07 Corning Incorporated Silicate glasses having low seed concentration
JP2012197226A (ja) * 2008-02-26 2012-10-18 Corning Inc ケイ酸塩ガラス用の清澄剤
US9073779B2 (en) 2008-02-26 2015-07-07 Corning Incorporated Fining agents for silicate glasses
US10626042B2 (en) 2008-02-26 2020-04-21 Corning Incorporated Fining agents for silicate glasses
JP2012092000A (ja) * 2010-09-28 2012-05-17 Nippon Electric Glass Co Ltd 硼珪酸ガラスの製造方法
WO2016088778A1 (fr) * 2014-12-02 2016-06-09 旭硝子株式会社 Plaque de verre et dispositif de chauffage l'utilisant
JP2017048092A (ja) * 2015-09-03 2017-03-09 日本電気硝子株式会社 医薬容器用ホウケイ酸ガラス
JP2017214272A (ja) * 2016-04-25 2017-12-07 ショット アクチエンゲゼルシャフトＳｃｈｏｔｔ ＡＧ 気泡形成を回避しつつガラス溶融物からガラス製品を製造するための装置および方法

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