WO2019181207A1 - Tube de verre de précision et son procédé de production - Google Patents

Tube de verre de précision et son procédé de production Download PDF

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Publication number
WO2019181207A1
WO2019181207A1 PCT/JP2019/002760 JP2019002760W WO2019181207A1 WO 2019181207 A1 WO2019181207 A1 WO 2019181207A1 JP 2019002760 W JP2019002760 W JP 2019002760W WO 2019181207 A1 WO2019181207 A1 WO 2019181207A1
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WO
WIPO (PCT)
Prior art keywords
glass
sio
bao
cao
glass tube
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Application number
PCT/JP2019/002760
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English (en)
Japanese (ja)
Inventor
橋本　幸市
哲哉 村田
Original Assignee
日本電気硝子株式会社
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Filing date
Publication date
Application filed by 日本電気硝子株式会社 filed Critical 日本電気硝子株式会社
Priority to CN201980005987.7A priority Critical patent/CN111386250A/zh
Priority to JP2020507390A priority patent/JP7202534B2/ja
Publication of WO2019181207A1 publication Critical patent/WO2019181207A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/04—Forming tubes or rods by drawing from stationary or rotating tools or from forming nozzles
    • 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

Definitions

  • the present invention relates to a precision glass tube used for inserting and fixing an optical fiber, and a manufacturing method thereof.
  • the precision sleeve is one of optical fiber connection members that hold and fix connection members such as capillaries to which optical fibers are fixed, capillaries to which optical fibers are fixed, and lenses.
  • a glass tube with precise dimensional accuracy is used as a precision sleeve.
  • the precision glass tube used for this application is produced as follows, for example. First, molten glass is formed into a tubular glass base material by tube drawing or the like. Next, the glass base material is heated and stretch-molded while being controlled to have a predetermined cross-sectional dimension / shape to produce a long glass tube main tube. Thereafter, the glass tube main tube is cut into a predetermined length. Furthermore, necessary processing such as flaring both ends is performed to obtain a precision glass tube.
  • a precision glass tube is manufactured by once forming a glass base material and then re-molding (stretching) as described above. For this reason, there exists a subject that manufacturing cost is high.
  • An object of the present invention is to provide a precision glass tube that can be produced at low cost.
  • the present inventors have found that the above problem can be solved by producing a precision glass tube using glass having a liquidus viscosity of 10 5.3 dPa ⁇ s or more.
  • the precision glass tube of the present invention is made of a glass having an average linear thermal expansion coefficient of 45 to 60 ⁇ 10 ⁇ 7 / ° C. and a liquid phase viscosity of 10 5.3 dPa ⁇ s or more in a temperature range of 30 to 380 ° C.
  • the outer diameter is 5 mm or less and the inner diameter is 4 mm or less.
  • the “average linear thermal expansion coefficient” is a temperature increase of 3 ° C./min after processing glass into a 5 mm ⁇ ⁇ 50 mm cylindrical sample and holding it in an electric furnace of a push rod type thermal expansion measuring device (dilatometer).
  • Liquid phase viscosity refers to the viscosity at which crystals begin to precipitate from the glass.
  • the liquid phase viscosity can be obtained by first obtaining a temperature at which crystals begin to precipitate (liquid phase temperature), and comparing the viscosity at this temperature with the result measured by the platinum ball pulling method.
  • the liquid phase temperature passes through a standard sieve 30 mesh (a sieve opening of 500 ⁇ m), and glass powder remaining in a 50 mesh (a sieve opening of 300 ⁇ m) is placed in a platinum boat, and then held in a temperature gradient furnace for 24 hours to produce crystals. It is the value which measured the temperature which deposits.
  • the conventional precision glass tube Since the conventional precision glass tube has a low liquid phase viscosity, it must be molded at a high temperature so as not to devitrify. When glass is molded at a high temperature, it is difficult to produce a glass article having precise dimensional accuracy because the viscosity of the glass is low and the wall thickness tends to fluctuate. Therefore, in the conventional method, once a glass base material is produced, this is stretch-molded to obtain a precise glass tube. On the other hand, in the present invention, a glass having a high liquidus viscosity is employed as the glass constituting the precision glass tube, so that it can be molded at a low temperature. As a result, it becomes possible to mold without causing a wall thickness variation, and it is possible to directly mold a precision glass tube having excellent dimensional accuracy from molten glass.
  • the outer diameter tolerance is preferably less than ⁇ 0.06 mm. “Outer diameter tolerance” is a value measured by a laser measuring instrument.
  • the inner diameter tolerance is preferably less than ⁇ 0.04 mm. “Inside diameter tolerance” is a value measured by a laser measuring instrument.
  • Precision Glass tube of the present invention as a glass composition, and SiO 2, and Al 2 O 3, and B 2 O 3, MgO, CaO , SrO, BaO, Li 2 O, from the group of Na 2 O and K 2 O At least one selected, and the content of these components is on a mol% basis, and ⁇ (Al 2 O 3 ) 3 + B 2 O 3 + SrO + BaO + K 2 O ⁇ / (SiO 2 + MgO + CaO + Li 2 O + Na 2 O) is 0 It is preferably made of .84 or more glass.
  • SiO 2 , Al 2 O 3 , B 2 O 3 , MgO, CaO, SrO, BaO, Li 2 O, Na 2 O and K 2 O SiO 2 , Al 2 O 3 and B 2 O 3 are essential components, and in addition to this, at least one selected from the group consisting of MgO, CaO, SrO, BaO, Li 2 O, Na 2 O and K 2 O is used. It also means that it includes. “(Al 2 O 3 ) 3 ” means a value obtained by raising the content of Al 2 O 3 to the third power.
  • B 2 O 3 + SrO + BaO + K 2 O means the total value of the contents of B 2 O 3 , SrO, BaO and K 2 O.
  • SiO 2 + MgO + CaO + Li 2 O + Na 2 O means the total value of the contents of SiO 2 , MgO, CaO, Li 2 O, and Na 2 O.
  • the above-mentioned configuration is a formula found as a result of the investigation of the relationship between the glass component and the liquid phase viscosity by the present inventors. If this configuration is adopted, the liquid phase viscosity of the glass is 10 5.3 dPa ⁇ s or more. It is easy to do.
  • the glass composition is mol%, SiO 2 65-80%, Al 2 O 3 1-10%, B 2 O 3 5-20%, CaO 0-5%, BaO 0-5%, It contains Na 2 O 0-10%, K 2 O 0-5%, and ⁇ (Al 2 O 3 ) 3 + B 2 O 3 + SrO + BaO + K 2 O ⁇ / (SiO 2 + MgO + CaO + Li 2 O + Na 2 O) is 0.84 or more It is preferable to consist of this glass.
  • the liquidus viscosity of the glass constituting the precision glass tube tends to be a 10 5.3 dPa ⁇ s or more.
  • Method for manufacturing a precision glass tube of the present invention as a glass composition, and SiO 2, and Al 2 O 3, and B 2 O 3, selected MgO, SrO, CaO, BaO, from the group of Na 2 O and K 2 O
  • the content of these components is on a mol% basis, and ⁇ (Al 2 O 3 ) 3 + B 2 O 3 + SrO + BaO + K 2 O ⁇ / (SiO 2 + MgO + CaO + Li 2 O + Na 2 O) is 0.
  • a glass raw material is prepared so as to have a glass of 84 or more, melted, and then pipe-formed to form a precision glass tube having an outer diameter of 5 mm or less and an inner diameter of 4 mm or less.
  • the glass composition is SiO 2 65-80%, Al 2 O 3 1-10%, B 2 O 3 5-20%, CaO 0-5%, BaO 0-5 as a glass composition.
  • the glass of the present invention has a glass composition of mol%, SiO 2 65-80%, Al 2 O 3 1-10%, B 2 O 3 5-20%, CaO 0-5%, BaO 0-5%.
  • the glass of the present invention having the above-described configuration is suitable as a glass used for producing a precision glass tube because the liquid phase viscosity of the glass tends to be 10 5.3 dPa ⁇ s or more.
  • the precision glass tube of the present invention is made of glass having a high liquidus viscosity.
  • the liquid phase viscosity is too low, devitrification is likely to occur when molded at a low temperature. Moreover, when it shape
  • a preferable range of the liquid phase viscosity is 10 5.3 dPa ⁇ s or more, 10 5.5 dPa ⁇ s or more, and particularly 10 5.7 dPa ⁇ s or more.
  • the upper limit of the liquid phase viscosity is not particularly limited, but is practically 10 8.0 dPa ⁇ s or less.
  • the precision glass tube of the present invention is a glass whose average linear thermal expansion coefficient in the temperature range of 30 to 380 ° C. can be matched with the average linear thermal expansion coefficient of the optical fiber connecting member. If the average linear thermal expansion coefficient is too large, the difference in thermal expansion coefficient from the optical fiber connecting member (for example, a capillary or the like) becomes large, resulting in inconveniences such as peeling, cracking, and deformation at the bonded portion with the optical fiber connecting member. If the average linear thermal expansion coefficient is too small, the difference in thermal expansion from the optical fiber connecting member becomes large, and inconveniences such as peeling, cracking, and deformation at an adhesive portion with the optical fiber connecting member occur.
  • the optical fiber connecting member for example, a capillary or the like
  • a preferable range of the average linear thermal expansion coefficient is 45 to 60 ⁇ 10 ⁇ 7 / ° C., more preferably 46 to 59 ⁇ 10 ⁇ 7 / ° C., particularly 48 to 58 ⁇ 10 ⁇ 7 / ° C.
  • the precision glass tube of the present invention preferably has an outer diameter of 5 mm or less and an inner diameter of 4 mm or less. If the outer diameter is too large, the clearance with the optical fiber connecting member becomes small, and it is difficult to assemble the parts. If the inner diameter is too large, the clearance with the optical fiber connecting member (for example, a capillary) becomes large, and when the optical fiber connecting members are butted together inside the tube, the optical axis is shifted and the light utilization efficiency is lowered. is there.
  • a preferable range of the outer diameter is 0.5 to 5.0 mm, particularly 1.0 to 4.5 mm.
  • a preferable range of the inner diameter is 0.05 to 4.0 mm, particularly 0.10 to 3.5 mm.
  • the precision glass tube of the present invention preferably has an outer diameter tolerance of less than ⁇ 0.06 mm, less than ⁇ 0.060 mm, particularly less than ⁇ 0.050 mm.
  • the inner diameter tolerance is preferably less than ⁇ 0.04 mm, less than ⁇ 0.040 mm, particularly preferably less than ⁇ 0.030 mm. If the outer diameter tolerance and the inner diameter tolerance are too large, the clearance with the optical fiber connecting member becomes unreasonably large, and there is a disadvantage that the light utilization efficiency is lowered due to the optical axis deviation.
  • the precision glass tube of the present invention preferably has an average linear transmittance of 70% or more in a wavelength range of 350 to 2000 nm and an optical path length of 1 mm.
  • the average linear transmittance is too low, the adhesive force by the photo-curing resin becomes insufficient in the adhering work using the photo-curing resin.
  • a preferable range of the average linear transmittance is 70% or more, 73% or more, and particularly 75% or more.
  • the “average linear transmittance” was measured by a double beam method (double beam) using a spectrophotometer UV-3100PC manufactured by Shimadzu Corporation and using the reference light as the atmosphere.
  • the SiO 2 as a glass composition, Al 2 O 3, and B 2 O 3, MgO, CaO , SrO, BaO, Li 2 O, at least one selected from the group of Na 2 O and K 2 O, and the content of these components is on a mol% basis
  • ⁇ (Al 2 O 3 ) 3 + B 2 O 3 + SrO + BaO + K 2 O ⁇ / (SiO 2 + MgO + CaO + Li 2 O + Na 2 O) is 0.84 or more, particularly as a glass composition, mol%, SiO 2 65 to 80%, Al 2 O 3 1 to 10%, B 2 O 3 5 to 20%, CaO 0-5%, BaO 0-5%, Na 2 O 0-10%, K 2 O 0-5%, (Al 2 O 3 ) 3 + B 2 O 3 + SrO + BaO + K 2 O ⁇ / It is preferable to employ a glass having (SiO 2 + MgO
  • the glass has the above composition range, it has an average linear thermal expansion coefficient of 45 to 60 ⁇ 10 ⁇ 7 / ° C. in a temperature range of 30 to 380 ° C. and a liquid phase viscosity of 10 5.3 dPa ⁇ s or more. . Further, if the glass has the above composition range, it becomes possible to directly form a precision glass tube excellent in outer diameter tolerance and inner diameter tolerance by tube drawing. The reason for limiting the glass composition range as described above will be described below. In the following description, “%” means mol%.
  • SiO 2 is a component necessary for constituting a glass skeleton.
  • the content of SiO 2 is too large, the viscosity becomes too high, the solubility is deteriorated, and the productivity is easily lowered.
  • the thermal expansion coefficient becomes too low, and the adhesiveness with the optical fiber connecting member tends to deteriorate.
  • the content of SiO 2 is too small, the thermal expansion coefficient becomes too high, and the difference in thermal expansion coefficient between the precision glass tube and the optical fiber connecting member (for example, a capillary) becomes large. As a result, inconveniences such as separation from the optical fiber connecting member, cracks, and deformation are likely to occur at the bonded portion.
  • the SiO 2 content is preferably 65 to 80%, 66 to 79%, particularly 67 to 78%.
  • Al 2 O 3 is a component that contributes to improving the stability and devitrification of glass.
  • Al 2 O 3 of the content is too high too high viscosity of the glass solubility during production is deteriorated, and productivity tends to decrease.
  • the content of Al 2 O 3 is preferably 1 to 10%, 2 to 9%, particularly 3 to 7%.
  • B 2 O 3 is a component necessary for improving the solubility of the glass and adjusting the viscosity. If the B 2 O 3 content is too large water resistance and weather resistance tends to deteriorate. B 2 viscosity when the content is too small for O 3 becomes too high solubility is deteriorated, and productivity tends to decrease. Further, the coefficient of thermal expansion becomes too high, and the adhesiveness with the optical fiber connecting member tends to deteriorate.
  • the content of B 2 O 3 is preferably 5 to 20%, 6 to 19%, particularly 7 to 18%.
  • MgO is a component that has an effect of increasing the dissolution rate and improving water resistance.
  • the MgO content is preferably 0 to 6%, 0 to 4%, particularly preferably 0 to 2%.
  • CaO is a component that contributes to the water resistance and weather resistance of glass. When there is too much content of CaO, devitrification will deteriorate and productivity will fall easily.
  • the CaO content is preferably 0 to 5%, 0.1 to 4%, particularly preferably 0.2 to 3%.
  • SrO is a component that increases the solubility by decreasing the high-temperature viscosity.
  • the SrO content is preferably 0 to 8%, 0 to 6%, particularly preferably 0 to 4%.
  • BaO is a component that contributes to adjustment of viscosity and improvement of workability during molding.
  • change_quantity of temperature will become large too much, and workability will deteriorate easily.
  • the BaO content is preferably 0 to 5.0%, 0.1 to 4.5%, particularly preferably 0.2 to 4.0%.
  • Na 2 O is a component that increases the thermal expansion coefficient and decreases the viscosity, and is used for adjusting the thermal expansion coefficient and viscosity. When the content of Na 2 O is too large thermal expansion coefficient becomes too high.
  • the content of Na 2 O is preferably 0 to 10%, 1 to 9%, particularly 2 to 8%.
  • K 2 O is a component added to facilitate melting of the glass and adjust the thermal expansion coefficient and viscosity. K 2 When the content of O is too large thermal expansion coefficient becomes too high.
  • the content of K 2 O is preferably 0.0 to 5.0%, 0.1 to 4.5%, particularly preferably 0.2 to 4.0%.
  • the value of ⁇ (Al 2 O 3 ) 3 + B 2 O 3 + SrO + BaO + K 2 O ⁇ / (SiO 2 + MgO + CaO + Li 2 O + Na 2 O) is preferably 0.84 or more, 0.85 or more, particularly preferably 0.86 or more. . Liquidus viscosity this value too low is less than 10 5.3 dPa ⁇ s, the moldability tends to decrease.
  • the value of ⁇ (Al 2 O 3 ) 3 + B 2 O 3 + SrO + BaO + K 2 O ⁇ / (SiO 2 + MgO + CaO + Li 2 O + Na 2 O) is 0.84 or more, 0.85 or more, particularly 0.86 or more. preferable. If this value is too large, the liquidus viscosity may decrease, and the moldability may easily decrease. Preferably it is 4.00 or less, 3.50 or less, 3.00 or less, especially 2.50 or less.
  • various components can be contained.
  • the content of Fe 2 O 3 contained as an impurity is preferably limited to 2000 ppm or less, particularly 1000 ppm or less. If the content of Fe 2 O 3 is too large, the average linear transmittance in the wavelength range of 350 to 2000 nm and the optical path length of 1 mm tends to decrease. As a result, for example, it is difficult to cure the ultraviolet curable resin used for fixing the optical fiber connecting member. However, not including Fe 2 O 3 is disadvantageous in terms of cost. Actually, the lower limit of Fe 2 O 3 is 50 ppm.
  • a glass raw material is prepared so as to have a desired composition. For example, containing SiO 2 , Al 2 O 3 , B 2 O 3, and at least one selected from the group consisting of MgO, SrO, CaO, BaO, Na 2 O and K 2 O described above, A glass raw material is used so that the content of the component is a glass having a molar ratio of ⁇ (Al 2 O 3 ) 3 + B 2 O 3 + SrO + BaO + K 2 O ⁇ / (SiO 2 + MgO + CaO + Li 2 O + Na 2 O) of 0.84 or more. Mix.
  • the glass raw material is contained so that the composition contains 0 to 5% of K 2 O and (Al 2 O 3 ) 3 + B 2 O 3 + SrO + BaO + K 2 O ⁇ / (SiO 2 + MgO + CaO + Li 2 O + Na 2 O) is 0.84 or more. It is preferable to blend.
  • the melting temperature is preferably 1500 to 1650 ° C.
  • the molten glass is formed into a tubular glass having an outer diameter of 5 mm or less and an inner diameter of 4 mm or less using a tube drawing method such as the Danner method, the down draw method, or the up draw method. Subsequently, the glass formed into a tubular shape is cut into a predetermined size, and post-processing such as flaring is performed as necessary to obtain a precision glass tube.
  • a tube drawing method such as the Danner method, the down draw method, or the up draw method.
  • the following method may be employed. First, it is formed into a tubular glass base material. Next, the glass base material is heated and stretch-molded while being controlled to have a predetermined cross-sectional dimension / shape to produce a long glass tube main tube. Thereafter, the glass tube main tube is cut into a predetermined length. Furthermore, necessary processing such as flaring both ends is performed to obtain a precision glass tube.
  • Example 1 Hereinafter, the present invention will be described based on examples.
  • Tables 1 to 4 show examples of the present invention (sample Nos. 1 to 39) and Table 5 shows comparative examples (samples No. 40 to 46).
  • a glass batch in which glass raw materials were prepared so as to have the glass composition shown in the table was placed in a platinum crucible and melted at 1500 to 1650 ° C. for 7 hours.
  • the molten glass was poured out on a carbon plate and formed into a plate shape.
  • the temperature at 10 3 dPa ⁇ s, the temperature at a high temperature viscosity of 10 2.5 dPa ⁇ s, the liquid phase temperature TL, and the viscosity (liquid phase viscosity) log 10 ⁇ at TL at the liquid phase temperature TL were evaluated.
  • the average coefficient of linear thermal expansion CTE in the temperature range of 30 to 380 ° C. is a value measured with a dilatometer.
  • the density is a value measured by the well-known Archimedes method.
  • strain point Ps and the annealing point Ta are values measured based on the method of ASTM C336.
  • the softening point Ts is a value measured based on the method of ASTM C338.
  • the temperatures at high temperature viscosities of 10 4 dPa ⁇ s, 10 3 dPa ⁇ s, and 10 2.5 dPa ⁇ s were measured by the platinum ball pulling method.
  • the liquid phase temperature TL is the temperature at which crystals pass after passing through a standard sieve 30 mesh (500 ⁇ m), putting the glass powder remaining on 50 mesh (300 ⁇ m) into a platinum boat and holding it in a temperature gradient furnace for 24 hours. It is a measured value.
  • Liquid phase viscosity log 10 ⁇ at TL is a value obtained by measuring the viscosity of glass at the liquidus temperature TL by a platinum ball pulling method.
  • sample No. Nos. 1 to 39 had an average linear thermal expansion coefficient of 49.4 to 57.5 ⁇ 10 ⁇ 7 / ° C. and a liquidus viscosity of 10 5.3 dPa ⁇ s or more.
  • sample No. which is a comparative example. 40-46 are liquidus viscosity of less than 10 5.3 dPa ⁇ s.
  • the glass raw material prepared so as to have a composition of 7 was put into a melting furnace and melted at 1550 ° C.
  • the molten glass was supplied to a dunner apparatus and formed into a tubular glass having an outer diameter of 2.8 mm and an inner diameter of 1.8 mm. Thereafter, the tubular glass was cut into a length of 10 mm to obtain a precision glass tube.
  • the precision glass tube thus produced was measured for outer diameter tolerance and inner diameter tolerance, which were ⁇ 0.05 mm and ⁇ 0.04 mm, respectively.
  • the outer diameter tolerance and inner diameter tolerance were measured with a laser measuring instrument.
  • the precision glass tube of the present invention can be suitably used as a connecting member for connecting optical communication members, for example, optical fibers or optically connecting an optical fiber to an optical semiconductor element or the like.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Glass Compositions (AREA)

Abstract

L'invention concerne un tube de verre de précision qui peut être fabriqué à faible coût. Ce tube de verre de précision est fabriqué à partir de verre ayant un coefficient de dilatation thermique linéaire moyen dans la plage de température de 30-380 °C de 45-60 × 10-7/°C et une viscosité en phase liquide de 10 5,3 dPa ∙ s ou plus , le tube de verre de précision ayant un diamètre externe de 5 mm ou moins et un diamètre interne de 4 mm ou moins.
PCT/JP2019/002760 2018-03-22 2019-01-28 Tube de verre de précision et son procédé de production WO2019181207A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201980005987.7A CN111386250A (zh) 2018-03-22 2019-01-28 精密玻璃管及其制造方法
JP2020507390A JP7202534B2 (ja) 2018-03-22 2019-01-28 精密ガラスチューブ及びその製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-053831 2018-03-22
JP2018053831 2018-03-22

Publications (1)

Publication Number Publication Date
WO2019181207A1 true WO2019181207A1 (fr) 2019-09-26

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PCT/JP2019/002760 WO2019181207A1 (fr) 2018-03-22 2019-01-28 Tube de verre de précision et son procédé de production

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JP (1) JP7202534B2 (fr)
CN (1) CN111386250A (fr)
WO (1) WO2019181207A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11951713B2 (en) 2020-12-10 2024-04-09 Corning Incorporated Glass with unique fracture behavior for vehicle windshield

Citations (7)

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Publication number Priority date Publication date Assignee Title
JPH0474731A (ja) * 1990-07-06 1992-03-10 Nippon Electric Glass Co Ltd 医薬用硼珪酸ガラス
JP2002187734A (ja) * 2000-12-15 2002-07-05 Nippon Electric Glass Co Ltd 蛍光ランプ用コバールシールガラス
JP2014015365A (ja) * 2012-07-11 2014-01-30 Nippon Electric Glass Co Ltd 医薬品容器用ガラス及びこれを用いたガラス管
JP2014088293A (ja) * 2012-10-31 2014-05-15 Nippon Electric Glass Co Ltd 医薬用ガラス及び医薬用ガラス管
JP2014169209A (ja) * 2013-03-05 2014-09-18 Nippon Electric Glass Co Ltd 医薬品容器及びその製造方法
JP2014237562A (ja) * 2013-06-07 2014-12-18 日本電気硝子株式会社 医薬容器用ホウケイ酸ガラス
JP2015098430A (ja) * 2013-09-02 2015-05-28 日本電気硝子株式会社 医薬容器用ホウケイ酸ガラス

Family Cites Families (2)

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Publication number Priority date Publication date Assignee Title
WO2005015606A1 (fr) * 2003-08-08 2005-02-17 Nippon Electric Glass Co., Ltd. Cloche pour lampe fluorescente a electrode exterieure vessel for external electrode fluorescent lamp
WO2014025009A1 (fr) * 2012-08-09 2014-02-13 日本電気硝子株式会社 Tube de verre et tube de verre renforcé

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0474731A (ja) * 1990-07-06 1992-03-10 Nippon Electric Glass Co Ltd 医薬用硼珪酸ガラス
JP2002187734A (ja) * 2000-12-15 2002-07-05 Nippon Electric Glass Co Ltd 蛍光ランプ用コバールシールガラス
JP2014015365A (ja) * 2012-07-11 2014-01-30 Nippon Electric Glass Co Ltd 医薬品容器用ガラス及びこれを用いたガラス管
JP2014088293A (ja) * 2012-10-31 2014-05-15 Nippon Electric Glass Co Ltd 医薬用ガラス及び医薬用ガラス管
JP2014169209A (ja) * 2013-03-05 2014-09-18 Nippon Electric Glass Co Ltd 医薬品容器及びその製造方法
JP2014237562A (ja) * 2013-06-07 2014-12-18 日本電気硝子株式会社 医薬容器用ホウケイ酸ガラス
JP2015098430A (ja) * 2013-09-02 2015-05-28 日本電気硝子株式会社 医薬容器用ホウケイ酸ガラス

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11951713B2 (en) 2020-12-10 2024-04-09 Corning Incorporated Glass with unique fracture behavior for vehicle windshield

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JP7202534B2 (ja) 2023-01-12
CN111386250A (zh) 2020-07-07

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