JP4596358B2 - Glass for sealing - Google Patents

Glass for sealing Download PDF

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Publication number
JP4596358B2
JP4596358B2 JP2004140717A JP2004140717A JP4596358B2 JP 4596358 B2 JP4596358 B2 JP 4596358B2 JP 2004140717 A JP2004140717 A JP 2004140717A JP 2004140717 A JP2004140717 A JP 2004140717A JP 4596358 B2 JP4596358 B2 JP 4596358B2
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Prior art keywords
glass
sealing
sno
vacuum
double container
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Expired - Fee Related
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JP2004140717A
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JP2005319150A (en
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武民 菊谷
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日本電気硝子株式会社
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Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL 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
    • C03C8/00Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
    • C03C8/02Frit compositions, i.e. in a powdered or comminuted form
    • C03C8/08Frit compositions, i.e. in a powdered or comminuted form containing phosphorus
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL 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
    • C03C3/00Glass compositions
    • C03C3/04Glass compositions containing silica
    • C03C3/062Glass compositions containing silica with less than 40% silica by weight
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL 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
    • C03C3/00Glass compositions
    • C03C3/04Glass compositions containing silica
    • C03C3/062Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064Glass compositions containing silica with less than 40% silica by weight containing boron
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL 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
    • C03C3/00Glass compositions
    • C03C3/04Glass compositions containing silica
    • C03C3/062Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/066Glass compositions containing silica with less than 40% silica by weight containing boron containing zinc
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL 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
    • C03C3/00Glass compositions
    • C03C3/04Glass compositions containing silica
    • C03C3/062Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/068Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL 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
    • C03C3/00Glass compositions
    • C03C3/12Silica-free oxide glass compositions
    • C03C3/16Silica-free oxide glass compositions containing phosphorus
    • C03C3/17Silica-free oxide glass compositions containing phosphorus containing aluminium or beryllium
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL 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
    • C03C3/00Glass compositions
    • C03C3/12Silica-free oxide glass compositions
    • C03C3/16Silica-free oxide glass compositions containing phosphorus
    • C03C3/19Silica-free oxide glass compositions containing phosphorus containing boron

Description

  The present invention relates to a sealing glass used for sealing a metal vacuum double container such as a thermos bottle (water bottle / launcher).

  As shown in FIG. 2, the metal vacuum double container 10 includes an outer container 11 and an inner container 12, and is sealed so that the outer container 11 and the inner container 12 overlap each other. The hollow portion 13 between the two is a container kept in a vacuum. This container is widely used in thermos bottles because it has high heat retention and does not break.

  As one method of manufacturing a metal vacuum double container, a method has been proposed in which an exhaust port is provided in either the outer container or the inner container, and the exhaust port is vacuum-sealed using low-melting glass ( For example, see Patent Document 1.)

In order to seal the exhaust port of a metal vacuum double container, PbO—B 2 O 3 based low melting point sealing glass has been used conventionally (for example, see Patent Document 2), but recently. From the viewpoint of environmental problems, low melting point sealing glass containing no lead is required.

SnO—P 2 O 5 -based glass has been proposed as a low-melting-point sealing glass that does not contain lead (see, for example, Patent Document 3).
Japanese Patent No. 27747748 JP 2002-125866 A JP 2004-67406 A

When SnO-P 2 O 5 glass is used for vacuum sealing, that is, when the glass is heated and softened in vacuum to seal the exhaust port of a metal vacuum double container, a lot of glass is contained in the glass. Since bubbles are generated, if the metal vacuum double container is used for a long period of time, the bubbles may leak and the airtightness may be impaired.

The object of the present invention is made of SnO—P 2 O 5 glass, and even when a metal double container is vacuum-sealed, the amount of generated gas is small, and airtightness is not impaired, and reliability is ensured. It is to provide a high sealing glass.

The present inventor conducted various experiments. When the SnO—P 2 O 5 glass is softened by heating in vacuum, the gas component contained in the glass is vaporized to generate many bubbles, and SnO When melting the -P 2 O 5 based glass, vacuum or, when or bubbling nitrogen gas, found that can reduce the amount of gas generated from the glass during vacuum sealing, and have proposed the present invention .

That is, the sealing glass of the present invention is a sealing glass made of SnO—P 2 O 5 glass used for vacuum-sealing the exhaust port provided in the metal double container,
The amount of gas generated when held in an environment of 5.0 × 10 −7 Torr and 500 ° C. for 30 minutes is 150 μL / g or less in terms of 0 ° C. and 1 atm,
SnO-P 2 O 5 based glass, as a glass composition, in mol%, SnO 30~70%, P 2 O 5 20~45%, 0~20% ZnO, 0~20% MgO, Al 2 O 3 0~10%, SiO 2 0~15%, B 2 O 3 0~30%, R 2 O (R is Li, Na, K, Cs) contained 0-20%, and one of the following ways It is characterized by being melted by .
(1) Nitrogen gas is bubbled through the molten glass.
(2) Melting under a reduced pressure environment of 600 Torr or less,
(3) The cycle of depressurizing the molten atmosphere and replacing with nitrogen gas is repeated twice or more.

  When the metal double container is vacuum-sealed using the sealing glass of the present invention, the amount of gas generated is small, so that bubbles remaining in the glass are reduced. Therefore, it is possible to perform highly reliable hermetic sealing.

  In the present invention, when the amount of gas generated from the sealing glass is more than 150 μL / g in terms of volume at 0 ° C. and 1 atm, vacuum sealing is performed using the sealing glass. There is a possibility that bubbles are likely to remain in the glass and leak from the bubbles, thereby impairing the airtightness.

In the present invention, the amount of gas generated means that the sealing glass heated to 500 ° C. is put in an environment of 5.0 × 10 −7 Torr and 500 ° C., and the gas generated in 30 minutes is vacuum gas. It is measured using an extraction device (quadrupole mass spectrometer) and indicates a value obtained by converting to a volume at 0 ° C. and 1 atm. 0.03-0.1g is suitable for the glass for sealing used for this measurement. If the amount exceeds 0.1 g, the amount of gas generated may be too large, and accurate measurement may not be possible. Therefore, when the glass for sealing is lump and is 0.1g or more, it measures using the 0.03-0.1g fragment | piece produced by crushing.

Sealing glass of the present invention, SnO 30 to 70% by mol%, P 2 O 5 20~45%, 0~20% ZnO, 0~20% MgO, Al 2 O 3 0~10%, SiO 2 to 15%, B 2 O 3 0 to 30%, R 2 O (R is Li, Na, K, Cs) It is preferable that the metal constituting the double container hardly changes in quality. Further, the sealing glass having the above composition is less likely to lose high airtightness over a long period of time without being crystallized or discolored after vacuum sealing.

The reason why the composition range of the SnO—P 2 O 5 glass is limited as described above will be described below.

  SnO is a component that lowers the melting point of glass. When SnO is less than 30%, the viscosity of the glass increases and the sealing temperature tends to increase, and when it exceeds 70%, vitrification becomes difficult. In addition, since it will become easy to devitrify at the time of sealing when there is much SnO, it is preferable that it is 60% or less. Moreover, if it is 40% or more, since it is excellent in fluidity | liquidity and high airtightness is obtained, it is preferable.

P 2 O 5 is a glass forming oxide. If the P 2 O 5 content is less than 20%, it is difficult to obtain sufficient glass stability. In the range of 20 to 45%, sufficient stability can be obtained for the glass, but when it exceeds 45%, the moisture resistance tends to deteriorate. Further, if P 2 O 5 is 25% or more, the glass is more stabilized, but if it exceeds 35%, the weather resistance of the sealing glass tends to be somewhat worse, so it is 25 to 35%. Is preferred.

  ZnO is an intermediate oxide. ZnO is not an essential component, but is desirably 4% or more because it has a great effect of stabilizing the glass. However, if ZnO exceeds 20%, devitrification tends to occur on the glass surface during sealing. The ZnO content is desirably 5 to 15%.

  MgO is a network modified oxide. MgO is not an essential component, but has an effect of stabilizing the glass. If MgO exceeds 20%, devitrification tends to occur on the glass surface during sealing. The content of MgO is desirably 0 to 5%.

Al 2 O 3 is an intermediate oxide. Al 2 O 3 is not an essential component, but it is desirable to contain Al 2 O 3 because it has the effect of stabilizing the glass and the effect of reducing the thermal expansion coefficient. However, if it exceeds 10%, the softening temperature rises and the sealing temperature becomes too high. In addition, when the stability of glass, a thermal expansion coefficient, fluidity | liquidity, etc. are considered, the range of 1-5% is more preferable.

SiO 2 is a glass forming oxide. Although SiO 2 is not an essential component, it is desirable to contain it because it has an effect of suppressing devitrification. If it exceeds 15%, the softening temperature rises and the sealing temperature tends to be high.

B 2 O 3 is a glass forming oxide. B 2 O 3 is not an essential component but has an effect of stabilizing the glass. However, if it exceeds 30%, the viscosity of the glass becomes too high, the fluidity at the time of sealing is remarkably deteriorated, and the airtightness of the sealing part is impaired. A preferable range of B 2 O 3 is 0 to 25%. Since B 2 O 3 has a strong tendency to increase the viscosity of glass, it is required to have very high fluidity, and when it is necessary to significantly lower the softening point, B 2 O 3 should not be contained.

R 2 O (R is Li, Na, K, Cs) is not an essential component, but when at least one of the R 2 O components is added to the composition, it has a strong adhesive force with a metal such as stainless steel SUS304. Become. However, if the total amount exceeds 20%, devitrification tends to occur during sealing. In consideration of surface devitrification and fluidity, the total amount of R 2 O is desirably 10% or less. Among R 2 Os, Li 2 O has the highest ability to improve the adhesive strength with metals such as stainless steel SUS304.

  Lanthanoid oxides are network modified oxides. By including the lanthanoid oxide in the glass component in a total amount of 0.1% or more, the weather resistance of the glass is easily improved. On the other hand, if the lanthanoid oxide exceeds 25%, the sealing temperature tends to be high. In consideration of the improvement in weather resistance and the balance between sealing temperatures, the total content of lanthanoid oxides is desirably 2 to 15%, particularly 4 to 15%.

In addition to the lanthanoid oxide, the use of other rare earths such as Y 2 O 3 is effective for improving the weather resistance of the glass. The amount of rare earth added excluding the lanthanoid oxide is preferably 0 to 5%.

Moreover, the glass for sealing of this invention can add various components in addition to the said component. For example, glass such as WO 3 , MoO 3 , Nb 2 O 5 , TiO 2 , ZrO 2 , CuO, MnO, In 2 O 3 , R′O (R ′ is Mg, Ca, Sr, Ba) is stabilized. A total of 35% of the components can be contained. In addition, when content of these stabilization components exceeds 35%, glass will become unstable and it will become difficult to manufacture. In order to obtain a more stable glass, the content is preferably 25% or less.

The contents of WO 3 and MoO 3 are both preferably 0 to 20%, particularly preferably 0 to 10%. If each of these components exceeds 20%, the viscosity of the glass tends to increase.

The contents of Nb 2 O 5 , TiO 2 , and ZrO 2 are all 0 to 15%, particularly preferably 0 to 10%. If each of these components exceeds 15%, the glass tends to be unstable.

  The contents of CuO and MnO are both 0 to 10%, particularly preferably 0 to 5%. If each of these components exceeds 10%, the glass tends to become unstable.

In 2 O 3 can be used for the purpose of obtaining high weather resistance when the cost is not taken into consideration. The content of In 2 O 3 is preferably 0 to 5%.

  The total content of R′O is preferably 0 to 15%, particularly preferably 0 to 5%. If R′O exceeds 15%, the glass tends to be unstable.

The glass having the above composition has a glass transition point of about 270 to 330 ° C., a softening point temperature of about 360 to 410 ° C., and exhibits good sealing properties in a temperature range of 400 to 600 ° C. Further, it has a thermal expansion coefficient of about 100 to 130 × 10 −7 / ° C. at 30 to 250 ° C.

  The shape of the sealing glass of the present invention is not limited as long as it can be stably disposed in the recess formed in either the inner container or the outer container of the metal double container. For example, it may be a rectangular parallelepiped, a cylinder, a sphere, a hemisphere, an elliptical sphere, an egg shape, or a lump having a shape similar to the above.

  The glass for sealing of this invention may contain 0-20 volume% of fillers for adjustment of a thermal expansion coefficient.

  As the filler, silica glass, quartz, cordierite, eucryptite, mullite, zircon, zirconium phosphate, willemite, alumina and the like can be used.

  Below, the manufacturing method of the glass for sealing of this invention is demonstrated.

  A sealing glass is prepared by melting a raw material prepared to have a desired composition at 800 to 900 ° C. and forming the raw material into a predetermined shape.

In the sealing glass of the present invention, when the raw material is melted, nitrogen gas is bubbled through the molten glass, a reduced pressure environment of 600 Torr or less, or a cycle of depressurizing and replacing with nitrogen gas is repeated twice or more. By performing such processing, Ri capable greens is possible to reduce the gas component remaining, be subjected to vacuum sealing with a glass for this sealing, since the air bubbles in the glass is less likely to remain, the length High airtightness can be maintained over a period of time.


  The sealing glass is manufactured as a chip having a predetermined size by drawing the molten glass into a rod shape and cutting it into a predetermined length, or dropping the molten glass, or solidifying the molten glass into a lump. Or manufactured by. In addition, the lump-like sealing glass is cut into a predetermined size and used as a sealing material.

  Hereinafter, the glass for sealing of this invention is demonstrated in detail based on an Example and a comparative example.

  Table 1 shows examples of the present invention (samples a to c), and Table 2 shows comparative examples (samples df).

  The sealing glass was prepared as follows.

  For sample a, the raw material prepared to have the composition shown in Table 1 was placed in a quartz crucible, heated from room temperature in an electric furnace in a nitrogen atmosphere, and the raw material was melted. Then, an alumina tube was inserted into the raw material melt. Then, it was melted at 850 ° C. for 2 hours while bubbling nitrogen gas, poured out from the crucible into a plate shape, and annealed.

  Sample b was prepared by putting a raw material prepared so as to have the composition shown in Table 1 into a quartz crucible, raising the temperature from room temperature in a nitrogen atmosphere, reducing the pressure at 500 ° C., and then substituting with nitrogen twice. It was melted for 2 hours while repeating the cycle of nitrogen replacement with 5 times after heating, reducing the pressure, and then flowing out from the crucible into a plate shape and performing annealing treatment.

  Sample c was prepared by putting the raw materials prepared so as to have the composition shown in Table 1 into a quartz crucible, substituting the inside of the electric furnace with nitrogen, putting the inside of the furnace under a reduced pressure of 500 Torr, and melting at 850 ° C. for 2 hours. It was produced by pouring and annealing so as to form a plate.

  Samples df were prepared by putting the raw materials prepared so as to have the composition shown in Table 2 into a quartz crucible, heated from normal temperature to 850 ° C. in an electric furnace in a nitrogen atmosphere, melted for 2 hours, and annealed. Made.

  The glass transition point and the coefficient of thermal expansion were measured with a push rod type thermal dilatometer (TMA manufactured by Rigaku) after molding each sample to 20 × 5 mmφ.

  The softening point was measured by a macro type differential thermal analysis (DTA) apparatus (manufactured by Rigaku).

The amount of gas generated was evaluated as follows. A 0.06 g piece produced by crushing the sample was heated to 500 ° C. and placed in a vacuum gas extraction apparatus, and kept at 5.0 × 10 −7 Torr, 500 ° C. for 30 minutes. The amount was measured. For detection of gas, a quadrupole mass spectrometer was used and converted to a volume at 0 ° C. and 1 atm.

  The foaming of the sealing glass was evaluated as follows.

  As shown in FIG. 1, a recess 4 having a diameter of 10 mm and a depth of 2 mm is formed at the bottom of an outer container 1 of a metal vacuum double container M, and an exhaust port 5 having a diameter of 1.5 mm provided at the center of the recess 4. The glass 6 for sealing cut out from each sample in the magnitude | size of 3x3x3 mm on this was arrange | positioned.

  Next, after leaving the metal double container M in a vacuum environment (0.1 Torr), the temperature was raised to 500 ° C. and held for 30 minutes to seal the exhaust port 5. In addition, the material of the metal double container M used stainless steel SUS304.

As is clear from Table 1, samples a to c have a thermal expansion coefficient of 115 to 126 × 10 −7 / ° C., a softening point of 366 to 397 ° C., and a sealing temperature of 500 ° C. or less. There was no crystal precipitation, discoloration, foaming, etc., and the exhaust port 5 of the metal vacuum double container M was well sealed.

  On the other hand, as apparent from Table 2, samples df were evaluated for foaming of the sealing glass, and fine bubbles were observed at the top and inside of the glass.

  The sealing glass of the present invention is suitable for sealing an exhaust port of a metal vacuum double container because no bubbles remain in the glass even when heated and softened in vacuum.

It is explanatory drawing which shows the sealing method of a metal vacuum double container. It is explanatory drawing which shows a vacuum double container.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 11 Outer container 2, 12 Inner container 3 Vacuum heat insulation layer 4 Recessed part 5 Exhaust port 6 Sealing glass M Metal vacuum double container 10 Vacuum double container 13 Hollow part

Claims (1)

  1. In the sealing glass made of SnO—P 2 O 5 glass used for vacuum sealing the exhaust port provided in the metal double container,
    The amount of gas generated when held in an environment of 5.0 × 10 −7 Torr and 500 ° C. for 30 minutes is 150 μL / g or less in terms of 0 ° C. and 1 atm,
    SnO-P 2 O 5 based glass, as a glass composition, in mol%, SnO 30~70%, P 2 O 5 20~45%, 0~20% ZnO, 0~20% MgO, Al 2 O 3 0~10%, SiO 2 0~15%, B 2 O 3 0~30%, R 2 O (R are Li, Na, K, Cs) contained 0-20%, and one of the following ways Glass for sealing characterized by being melted by the method .
    (1) Nitrogen gas is bubbled through the molten glass.
    (2) Melting under a reduced pressure environment of 600 Torr or less,
    (3) The cycle of depressurizing the molten atmosphere and replacing with nitrogen gas is repeated twice or more.
JP2004140717A 2004-05-11 2004-05-11 Glass for sealing Expired - Fee Related JP4596358B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004140717A JP4596358B2 (en) 2004-05-11 2004-05-11 Glass for sealing

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JP2004140717A JP4596358B2 (en) 2004-05-11 2004-05-11 Glass for sealing
CN 200510068881 CN1696071A (en) 2004-05-11 2005-05-11 Sealing glass

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JP4596358B2 true JP4596358B2 (en) 2010-12-08

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Families Citing this family (12)

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CN101177336B (en) * 2007-08-03 2011-03-09 安徽华东光电技术研究所 Aluminium-manganese glass powder and its application in a-Al2O3 single crystal wafer
WO2009088086A1 (en) 2008-01-10 2009-07-16 Asahi Glass Company, Limited Glass, coating material for light-emitting device, and light-emitting device
EP2308806A4 (en) * 2008-08-06 2013-01-02 Nippon Electric Glass Co Sealing glass
JP5471095B2 (en) * 2009-07-09 2014-04-16 旭硝子株式会社 Sealing glass
JP2011046550A (en) * 2009-08-26 2011-03-10 Nippon Electric Glass Co Ltd Method for producing sealing glass and sealing glass
JP5585467B2 (en) * 2011-01-20 2014-09-10 旭硝子株式会社 Glass, glass coating material for light emitting device and light emitting device
CN102201725B (en) * 2011-04-01 2013-01-23 江苏大学 Magnetic coupling capable of preventing damages of spacer sleeve and resulting leakage of medium
JP5356585B2 (en) * 2011-08-09 2013-12-04 パナソニック株式会社 Sealed container, method for manufacturing the same, and vacuum insulator
JP5982925B2 (en) * 2012-03-26 2016-08-31 旭硝子株式会社 Low melting point glass body manufacturing method
CN103449724A (en) * 2013-08-23 2013-12-18 青岛光路玻璃器件有限公司 Leadless low-temperature sealing glass
CN107057420A (en) * 2016-12-29 2017-08-18 广州凯耀资产管理有限公司 Inorganic slim expansion fire-resistant coating for steel structure and preparation method thereof
CN107043216A (en) * 2017-04-25 2017-08-15 福州大学 SiO2Modified low temperature sealing glass and its preparation and application method

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JPH06169850A (en) * 1992-12-07 1994-06-21 Nippon Sanso Kk Metallic vacuum double container and its manufacture
JPH06183775A (en) * 1992-08-03 1994-07-05 Corning Inc Lead-free glass and sealing material using the same
JP2002167234A (en) * 2000-11-30 2002-06-11 Nippon Electric Glass Co Ltd Sealing glass for vacuum double-walled metal container
JP2002367510A (en) * 2001-06-12 2002-12-20 Asahi Glass Co Ltd Glass frit firing method
JP2003306333A (en) * 2003-03-31 2003-10-28 Asahi Techno Glass Corp Method of manufacturing glass for bonding, vacuum sealed container using glass for bonding and method of manufacturing the same
JP2004067406A (en) * 2002-08-02 2004-03-04 Asahi Techno Glass Corp Frit for sealing of metal vacuum vessel having dual structure, and metal vacuum vessel having dual structure

Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
JPH06183775A (en) * 1992-08-03 1994-07-05 Corning Inc Lead-free glass and sealing material using the same
JPH06169850A (en) * 1992-12-07 1994-06-21 Nippon Sanso Kk Metallic vacuum double container and its manufacture
JP2002167234A (en) * 2000-11-30 2002-06-11 Nippon Electric Glass Co Ltd Sealing glass for vacuum double-walled metal container
JP2002367510A (en) * 2001-06-12 2002-12-20 Asahi Glass Co Ltd Glass frit firing method
JP2004067406A (en) * 2002-08-02 2004-03-04 Asahi Techno Glass Corp Frit for sealing of metal vacuum vessel having dual structure, and metal vacuum vessel having dual structure
JP2003306333A (en) * 2003-03-31 2003-10-28 Asahi Techno Glass Corp Method of manufacturing glass for bonding, vacuum sealed container using glass for bonding and method of manufacturing the same

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CN1696071A (en) 2005-11-16

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