WO2011136109A1 - Appareil pour le traitement du verre fondu, son procédé de production, et utilisation - Google Patents

Appareil pour le traitement du verre fondu, son procédé de production, et utilisation Download PDF

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Publication number
WO2011136109A1
WO2011136109A1 PCT/JP2011/059753 JP2011059753W WO2011136109A1 WO 2011136109 A1 WO2011136109 A1 WO 2011136109A1 JP 2011059753 W JP2011059753 W JP 2011059753W WO 2011136109 A1 WO2011136109 A1 WO 2011136109A1
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Prior art keywords
glass
molten glass
processing apparatus
layer
molten
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PCT/JP2011/059753
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English (en)
Japanese (ja)
Inventor
栄治 柳澤
和雄 浜島
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旭硝子株式会社
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Application filed by 旭硝子株式会社 filed Critical 旭硝子株式会社
Priority to JP2012512803A priority Critical patent/JP5692223B2/ja
Priority to KR1020127028007A priority patent/KR20130080781A/ko
Priority to CN201180021089.4A priority patent/CN102869621B/zh
Publication of WO2011136109A1 publication Critical patent/WO2011136109A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/167—Means for preventing damage to equipment, e.g. by molten glass, hot gases, batches
    • C03B5/1672—Use of materials therefor
    • C03B5/1675—Platinum group metals
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/225—Refining
    • C03B5/2252—Refining under reduced pressure, e.g. with vacuum refiners
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
    • C03B5/43—Use of materials for furnace walls, e.g. fire-bricks

Definitions

  • the present invention relates to a molten glass processing apparatus, a manufacturing method thereof, and an application thereof.
  • platinum or a platinum alloy is generally used as a material of a member that comes into contact with molten glass.
  • the platinum alloy is an alloy containing rhodium (Rh), iridium (Ir), ruthenium (Ru), gold (Au) and the like in addition to platinum (Pt).
  • Platinum and platinum alloys have high melting points, are not easily oxidized in the air, and have low reactivity with molten glass, and are therefore suitable as materials for members that are in contact with molten glass.
  • the glass when glass or the like is used as the material for the hydrogen low-permeability layer, the glass may thermally flow downward due to its own weight and be separated from the outer surface of the member.
  • alkali-free glass has been used for flat panel displays (FPD) such as liquid crystal displays (LCD).
  • FPD flat panel displays
  • the alkali-free glass is a glass that does not substantially contain an alkali metal, and has a melting temperature higher by 100 ° C. or more than a general soda lime glass. For this reason, the use temperature of the member is high, and the above problem is easily realized.
  • Oxyfuel combustion burners have better heating efficiency than air combustion burners.
  • the water concentration in the upper space in the melting tank increases, so the water concentration dissolved in the molten glass increases. For this reason, the above problem is easily realized.
  • This invention is made
  • the present invention provides a member made of platinum or a platinum alloy whose inner surface is in contact with molten glass, a glass layer covering at least a part of the outer surface of the member, and at least the outer side of the glass layer.
  • a molten glass processing apparatus comprising a heat-resistant fiber body infiltrated with The heat-resistant fiber body includes glass fiber or ceramic fiber, and is expressed by mass% based on oxide, and the SiO 2 content is 50% or more, The glass forming the glass layer has a viscosity of 10 2.5 dPa ⁇ s or more at the use temperature,
  • a molten glass processing apparatus is provided in which the glass layer includes voids that are not in communication with the outside air.
  • the molten glass processing apparatus is an apparatus for processing molten glass, for example, an apparatus for melting, clarifying, adjusting temperature, conveying, stirring and the like of molten glass.
  • the molten glass processing apparatus of this invention is not limited to this.
  • FIG. 1 is a sectional view of a molten glass processing apparatus in use according to an embodiment of the present invention.
  • the molten glass processing apparatus 1 covers at least a part of a platinum or platinum alloy member 3 whose inner surface 31 is in contact with the molten glass 2 and an outer surface 32 of the member 3.
  • a glass layer 4 and a heat-resistant fiber body 5 in which at least the outer side (the side opposite to the member 3) of the glass layer 4 penetrates are provided.
  • the glass layer 4 covers at least a part of the outer surface 32 of the member 3, thereby suppressing hydrogen contained in the molten glass 2 from passing through the member 3 and dissipating to the outside.
  • the heat-resistant fiber body 5 suppresses the glass layer 4 from heat flowing.
  • the member 3 is made of platinum or a platinum alloy.
  • the platinum alloy is an alloy containing rhodium (Rh), iridium (Ir), ruthenium (Ru), gold (Au) and the like in addition to platinum (Pt). Since platinum and platinum alloys have the characteristics that they have a high melting point, are not easily oxidized in the atmosphere, and have low reactivity with the molten glass 2, they are suitable as materials for the member 3 with which the molten glass 2 comes into contact.
  • the shape of the member 3 is set according to the type and application of the molten glass processing apparatus 1.
  • the shape of the member 3 is set to a box shape or a tube shape.
  • the molten glass 2 is in contact with the inner surface 31 of the member 3, and the glass layer 4 is in contact with the outer surface 32 of the member 3.
  • the glass layer 4 covers at least part of the outer surface 32 of the member 3, thereby suppressing hydrogen contained in the molten glass 2 from passing through the member 3 and dissipating to the outside.
  • the decomposition of dissolved water is suppressed. Therefore, it is possible to suppress the generation of bubbles due to the decomposition of moisture. Moreover, volatilization of platinum or the like can be suppressed.
  • the glass forming the glass layer 4 is not particularly limited, but, for example, expressed in terms of mass% based on oxide, SiO 2 : 50 to 72%, Al 2 O 3 : 0.5 to 24%, preferably 0.5 to 23%, B 2 O 3 : 0-12%, MgO: 0-8%, CaO: 0-14.5%, SrO: 0-24%, BaO: 0-13.5%, Na 2 O + Li 2 O + K 2 O: 0 to 15%, MgO + CaO + SrO + BaO is 9 to 29.5%. At this time, it may further contain ZrO 2 : 0 to 5%.
  • the glass forming the glass layer 4 is preferably non-alkali glass. This is to prevent alkali metal in the glass layer 4 from being mixed into the molten glass 2 when the member 3 is damaged.
  • the alkali-free glass for forming the glass layer 4 is not particularly limited.
  • SiO 2 50 to 66%
  • Al 2 O 3 10.5 to 24%, preferably 10. 5-22%
  • B 2 O 3 0-12%
  • SrO: 0-24% SrO: 0-24%
  • MgO + CaO + SrO + BaO is 9 to 29.5%.
  • it may further contain ZrO 2 : 0 to 5%.
  • SiO 2 58 to 66%
  • Al 2 O 3 15 to 22%
  • B 2 O 3 5 to 12%
  • MgO 0 to 8%
  • CaO 0 in terms of mass% based on oxide. -9%
  • SrO 3 to 12.5%
  • BaO 0 to 2%
  • MgO + CaO + SrO + BaO is 9 to 18%.
  • the glass forming the glass layer 4 has a viscosity ⁇ of 10 2.5 dPa ⁇ s or more (preferably 10 2.8 dPa ⁇ s or more, more preferably 10 3.5 dPa ⁇ s or more) at the use temperature. .
  • the viscosity ⁇ is preferably 10 4.8 dPa ⁇ s or less, more preferably 10 4.5 dPa ⁇ s or less, at the use temperature.
  • the operating temperature refers to the temperature when the member 3 is in contact with the molten glass 2.
  • the operating temperatures of the molten glass 2, the member 3, and the glass layer 4 are usually substantially the same.
  • the penetration depth D2 of the glass layer 4 into the heat resistant fiber body 5 is desirably 0.1 mm or more.
  • the penetration depth D2 means an average value. If the penetration depth D2 is too small, it is difficult to suppress the heat flow of the glass layer 4 by the heat resistant fiber body 5.
  • the glass forming the glass layer 4 is desirably glass having higher wettability to the member 3 than the heat-resistant fiber body 5 at the use temperature. Thereby, the adhesiveness of the glass layer 4 and the member 3 can be improved.
  • the contact angle ⁇ a between the glass forming the glass layer 4 and the material constituting the member 3 depends on the type of glass, but is 30 to 60 °, preferably 30 ° C., preferably 45-55 °.
  • the contact angle is based on the contact angle defined in JIS R 3257-1999.
  • the contact angle ⁇ a is set such that a test plate formed of a material constituting the member 3 (for example, platinum or a platinum alloy) is installed horizontally, and a glass droplet forming the glass layer 4 is left on the test plate. Measured. This contact angle can be measured by a commercially available apparatus.
  • the contact angle ⁇ b between the glass forming the glass layer 4 and the material constituting the heat resistant fiber body 5 is, for example, 60 to 110 °, preferably 70 to 110 ° at the operating temperature. It is.
  • contact angle (theta) b is too small, the adhesiveness of the glass layer 4 and the member 3 will worsen.
  • the contact angle ⁇ b is too large, the adhesion between the glass layer 4 and the heat-resistant fiber body 5 is deteriorated.
  • the contact angle ⁇ b is set such that a test plate (for example, a glass plate or a ceramic plate) formed with the same composition as the material (for example, glass or ceramics) constituting the heat-resistant fiber body 5 is installed horizontally.
  • the glass droplets forming 4 are placed on a test plate and measured.
  • the thickness D1 (including the penetration depth D2) of the glass layer 4 is desirably 0.2 mm or more.
  • the thickness D1 means an average value. If the thickness D1 is too small, the effect of providing the glass layer 4 is not sufficiently exhibited. On the other hand, if the thickness D1 is excessive, the glass forming the glass layer 4 is thermally flowed downward by its own weight, and the glass layer 4 is separated from the member 3. Therefore, the thickness D1 is preferably 3 mm or less, more preferably less than 1 mm, further preferably 0.9 mm or less, and particularly preferably 0.8 mm or less.
  • the glass layer 4 of the present embodiment includes voids 7 and 9 that are not in communication with outside air, as shown in FIG.
  • the voids 7 and 9 are distributed in the glass layer 4.
  • the gap 7 is open to the outer surface 32 of the member 3, and the gas in the gap 7 is in contact with the outer surface 32 of the member 3.
  • the void 7 suppresses hydrogen from permeating the member 3 from the inside to the outside, and thus suppresses the generation of bubbles in the molten glass 2. The reason is not fully understood, but the following reasons (1) to (3) are possible.
  • Hydrogen is contained as atoms in the solid and liquid such as the member 3 and the glass layer 4 and is contained as molecules in the gas in the gap 7. Therefore, in order for hydrogen to move from the member 3 to the glass layer 4 through the gap 7, the molecules need to be decomposed into atoms after the atoms are combined into molecules. Since these bonds and decomposition require a predetermined energy, the movement of hydrogen is suppressed.
  • the void 7 forms a contact interface between the glass forming the glass layer 4 and the member 3, thereby expressing the surface tension of the glass with respect to the member 3, and the glass thermally flows with respect to the member 3. Is suppressed.
  • the air gap 9 is configured so that the gas in the air gap 9 does not contact the outer surface 32 of the member 3.
  • the gap 9 suppresses hydrogen from permeating the member 3 from the inside to the outside for the same reason as the above (2), and consequently suppresses the generation of bubbles in the molten glass 2.
  • the gaps 7 and 9 not communicating with the outside air occupy 2 to 70% of the cross section of the glass layer 4 in total. If the ratio of the voids 7 and 9 is too low, the effects (1) to (3) described above cannot be obtained sufficiently. On the other hand, if the proportion of the gaps 7 and 9 is too high, the gaps 7 and 9 communicate with the outside air, and the mechanical strength of the glass layer 4 is lowered.
  • a more preferred range is 5 to 65%, a further preferred range is 10 to 60%, and a particularly preferred range is 20 to 50%.
  • the glass layer 4 of the present embodiment is assumed to include both the gaps 7 and 9, the present invention is not limited to this.
  • the glass layer 4 may include only the voids 7.
  • gap 7 and 9 of this embodiment is formed in the part which is not osmose
  • the heat-resistant fiber body 5 may be formed in a portion penetrating. Incidentally, in this case, the gas in the gaps 7 and 9 comes into contact with the heat resistant fiber body 5.
  • the heat resistant fiber body 5 suppresses the heat flow of the glass layer 4. Further, the heat resistant fiber body 5 extends outward from the glass layer 4, thereby blocking the flow of outside air in contact with the glass layer 4. This is because when fresh outside air comes into contact with the glass layer 4, the hydrogen concentration and moisture concentration of the gas in the gaps 7 and 9 are lowered.
  • the heat resistant fiber body 5 includes glass fiber or ceramic fiber.
  • heat resistance means that in the case of glass fiber, the glass fiber has a softening point higher than the use temperature, and in the case of ceramic fiber, it means that the ceramic fiber has a melting point higher than the use temperature. . Since these fibers are hardly thermally deformed at the use temperature, the heat flow of the glass layer 4 can be suppressed.
  • the heat resistant fiber body 5 is an aggregate of these fibers.
  • a plurality of fibers may be knitted in a cloth shape, or a plurality of fibers may be entangled in a lump shape.
  • a fabric in which a plurality of fibers are knitted is excellent in flexibility and workability.
  • the average length of the fibers is preferably 10 mm or more.
  • the heat-resistant fibrous body 5 is expressed by mass% based on oxide, and has a SiO 2 content of 50% or more. When the SiO 2 content is less than 50%, the glass that forms the glass layer 4 with respect to the heat-resistant fiber body 5 has too high wettability, so that the glass flows out through the heat-resistant fiber body 5 and the glass layer 4 Is separated from the member 3.
  • the thickness D3 (including the penetration depth D2) of the heat resistant fiber body 5 is preferably 0.5 mm or more.
  • the thickness D3 means an average value.
  • the heat-resistant fiber body 5 has insufficient rigidity, and the effect of suppressing the heat flow of the glass layer 4 cannot be sufficiently obtained.
  • the heat insulating member 6 may be provided outside the heat resistant fiber body 5.
  • the heat insulating member 6 is made of a refractory or the like. The heat insulating member 6 relaxes cooling by the outside air and suppresses deformation of the member 3, the heat resistant fiber body 5, and the like due to the liquid pressure of the molten glass 2.
  • This manufacturing method includes a step of forming a glass layer 4 by forming a coating layer containing glass powder between the member 3 and the heat-resistant fiber body 5 and firing the coating layer.
  • a coating layer 8 is formed by applying a slurry containing glass powder to at least a part of the outer surface 32 of the member 3 and drying it.
  • the slurry preferably contains an inorganic binder or an organic binder.
  • an inorganic binder colloidal silica or the like is used.
  • an organic binder a water-soluble polymer (for example, trade name: Metrows, manufactured by Shin-Etsu Chemical Co., Ltd.) is used.
  • the method of applying the slurry may be a general method, and for example, a spray coating method, a spin coating method, a screen printing method, a brush coating, or the like is used. Instead of applying the slurry, a film obtained by drying the slurry may be attached.
  • the temperature for drying the applied slurry is preferably 40 to 130 ° C.
  • the heat-resistant fiber body 5 is attached to the outside of the coat layer 8. In that case, you may hold
  • the assembly shown in FIG. 3 is fired. Thereby, the glass powder contained in the coat layer 8 is heat-fluidized to become the glass layer 4 shown in FIG. 1, and the gap between the glass powders becomes the gaps 7 and 9 shown in FIG.
  • Calcination conditions are appropriately set according to the type of glass powder and the ratio of voids 7 and 9.
  • the firing is performed in the atmosphere at substantially the same temperature as the use temperature.
  • the molten glass processing apparatus 1 shown in FIG. 1 is obtained. Since this manufacturing method does not require a thermal spraying device or the like, it is possible to provide the glass layer 4 and the heat-resistant fiber body 5 on the member 3 which is an existing facility.
  • the heat resistant fiber body 5 was stuck on the outer side of the coating layer 8, but this invention is not limited to this.
  • the inside of the heat resistant fiber body 5 is attached to the outer surface 32 of the member 3 and dried to form the coat layer 8. Also good.
  • FIG. 4 is a block diagram of a glass manufacturing apparatus provided with the molten glass processing apparatus 1.
  • the glass manufacturing apparatus 10 includes a dissolution tank 11, a clarification tank 12, a stirring tank 13, and a forming apparatus 14.
  • the dissolution tank 11, the clarification tank 12, the stirring tank 13, and the molding apparatus 14 are connected by transfer pipes 15 to 17.
  • the melting tank 11 melts the glass raw material to produce molten glass.
  • the inner wall of the dissolution tank 11 is provided with a raw material inlet, a plurality of burners, and the like.
  • the burner include an air combustion burner and an oxyfuel combustion burner. From the viewpoint of environmental protection, an oxyfuel combustion burner is preferable.
  • the glass raw material charged from the raw material inlet is heated by the radiant heat of the flame spouted by the burner to become molten glass.
  • the molten glass is sent to the clarification tank 12 through the transport pipe 15.
  • the clarification tank 12 floats and removes bubbles contained in the molten glass. These bubbles are mainly generated when the powdery glass raw material is melted. In order to promote the rising of bubbles, for example, the upper space in the clarification tank 12 may be decompressed. The molten glass in the clarification tank 12 is sent to the stirring tank 13 through the transport pipe 16.
  • the agitation tank 13 agitates and homogenizes the molten glass.
  • a rotating member such as a stirrer is used.
  • the molten glass in the stirring tank 13 is sent to the molding apparatus 14 via the transport pipe 17.
  • the forming device 14 forms molten glass into a predetermined shape.
  • the forming device 14 may be a general device used for forming molten glass. For example, when the molten glass is formed into a strip shape, a float forming device or a fusion forming device is used as the forming device 14.
  • molding apparatus 14 uses a casting molding apparatus, when shape
  • the molten glass processing apparatus 1 is used for at least some inner walls (particularly, side walls and bottom walls) of the dissolution tank 11, the clarification tank 12, the stirring tank 13, and the transfer pipes 15 to 17.
  • the glass manufacturing apparatus 10 by this embodiment is equipped with the molten glass processing apparatus 1 and the shaping
  • a plurality of types of raw materials are mixed to prepare a glass raw material.
  • SiO 2 50 to 72%
  • Al 2 O 3 0.5 to 24%, preferably 0.5 to 23%
  • B 2 O 3 0 to 12%
  • MgO 0-8%
  • CaO 0-14.5%
  • SrO 0-24%
  • BaO 0-13.5%
  • MgO + CaO + SrO + BaO is 9
  • a plurality of types of raw materials are prepared so that the glass is ⁇ 29.5% (in this case, ZrO 2 may further contain 0 to 5%).
  • an alkali-free glass raw material for example, SiO 2 : 50 to 66%, Al 2 O 3 : 10.5 to 24%, preferably 10.5 to 22%, expressed in terms of mass% based on oxide.
  • 2 O 3 0-12%, MgO: 0-8%, CaO: 0-14.5%, SrO: 0-24%, BaO: 0-13.5%, MgO + CaO + SrO + BaO is 9-29.
  • Plural kinds of raw materials are prepared so as to be an alkali-free glass of 5% (which may further contain ZrO 2 : 0 to 5% at this time).
  • SiO 2 58 to 66%
  • Al 2 O 3 15 to 22%
  • B 2 O 3 5 to 12%
  • MgO 0 to 8%
  • CaO 0 in terms of mass% based on oxide.
  • a plurality of kinds of raw materials are prepared so as to be an alkali-free glass containing ⁇ 9%, SrO: 3 to 12.5%, BaO: 0 to 2% and MgO + CaO + SrO + BaO being 9 to 18%.
  • the prepared glass raw material is put into the melting tank 11 to produce molten glass.
  • the manufactured molten glass is sent to the clarification tank 12 through the transport pipe 15, and bubbles contained therein are floated and removed. These bubbles are mainly generated when the powdery glass raw material is melted.
  • the upper space in the clarification tank 12 may be decompressed.
  • the molten glass in the clarification tank 12 is sent to the agitation tank 13 via the transport pipe 16, and the molten glass is agitated and homogenized.
  • the molten glass in the agitation tank 13 is sent to the molding device 14 via the transport pipe 17 and molded into a predetermined shape.
  • the molding method include a float method, a fusion method, and a casting method. The molded molten glass is gradually cooled and then cut into predetermined dimensions as necessary to obtain a product.
  • the molten glass processing apparatus 1 is used for at least some inner walls (particularly, side walls and bottom walls) of the dissolution tank 11, the clarification tank 12, the stirring tank 13, and the transfer pipes 15 to 17.
  • the glass manufacturing method by this embodiment shape
  • Example 1 to Example 12 (Molten glass processing equipment) First, a crucible made of platinum alloy (platinum 90% by mass, rhodium 10% by mass) was prepared as a member in contact with the molten glass. This crucible conforms to JIS H 6201-1986 and has a predetermined shape (height: 27 mm, upper outer diameter: 25 mm, bottom outer diameter: 15 mm, capacity: 10 cc, mass: 8.0 g).
  • the slurry was applied to the outer surface of the prepared crucible and dried in the atmosphere at 90 ° C. for 2 hours to form a coat layer.
  • the slurry used was prepared by mixing 67 parts by mass of glass powder (particle size: # 320 under) and 33 parts by mass of an aqueous Metrose solution (concentration: 0.3% by mass).
  • As the glass powder any one of glasses A to D shown in Table 1 was used. Glasses A to C are alkali-free glass.
  • the composition of each glass AD is shown in Table 1.
  • the heat-resistant fiber body impregnated with the above-mentioned Metrose aqueous solution was attached to the outside of the coat layer.
  • One of the following commercially available products was used as the heat resistant fiber body. That is, a quartz glass cloth (made by Nichias, Siltex cloth, SiO 2 : 99% by mass or more), a ribbon-like ceramic cloth (made by Nichias, SiO 2 : 53 mass) as a plurality of fibers knitted into a cloth shape.
  • alumina cloth manufactured by Nichias, Al 2 O 3 : 99% by mass or more
  • zirconia cloth manufactured by Zirker, ZrO 2 : about 90% by mass, Y 2 O 3 : About 10% by mass
  • silica alumina cloth manufactured by Denka, SiO 2 : 20% by mass, Al 2 O 3 : 80% by mass.
  • quartz glass wool manufactured by Tosoh Corporation, SiO 2 : 99% by mass or more
  • a heat insulating member As the heat insulating member, a refractory having a bottomed cylindrical shape (external dimensions: 48 mm ⁇ 48 mm ⁇ 48 mm, recess depth: 26 mm, recess inner diameter: 32 mm) containing alumina and silica was used.
  • molten glass is put into a platinum alloy crucible, heat-treated for 1 hour at an operating temperature T in an air atmosphere having a low moisture concentration (absolute humidity: 3 g / m 3 ), and then cooled to room temperature to melt.
  • a glass processing apparatus was manufactured.
  • the molten glass charged into the crucible includes non-alkali glass (in terms of mass% based on oxide, SiO 2 : 59.4%, Al 2 O 3 : 17.6%, B 2 O 3 : 7.9% MgO: 3.3%, CaO: 3.8%, SrO: 8.0%).
  • This alkali-free glass had a ⁇ -OH value B indicating the water content of 0.5 mm ⁇ 1 before being put into the crucible.
  • the ⁇ -OH value B was calculated by measuring the glass thickness C and transmittance T of a glass using a Fourier transform infrared spectrophotometer (FT-IR) and substituting the measurement results into the following equation.
  • B (1 / C) log 10 (T1 / T2) (where T1: transmittance of glass at a reference wavenumber of 4000 / cm (unit:%), T2: minimum transmittance of glass near a hydroxyl absorption wavenumber of 3570 / cm) (unit:%))
  • the ratio of bubbles contained in the molten glass is obtained by imaging the inside of the crucible of the molten glass processing apparatus manufactured from above with a camera, and the ratio of the area S2 of bubbles to the area S1 of the upper surface of the molten glass in the captured image (S2 / S1). ⁇ 100).
  • the ratio of the bubbles is preferably 15% or less, more preferably 3% or less in consideration of the high-quality display quality recently required for flat panel displays for plasma displays and liquid crystal displays. More preferably, it is 1% or less.
  • the thickness of the glass layer, the proportion of voids in the cross section of the glass layer, the adhesion between the glass layer and the crucible, the thickness of the heat-resistant fiber body, the penetration depth of the glass layer into the heat-resistant fiber body is the melt produced
  • the glass processing apparatus was halved vertically, and the cut surface was examined by observation with a microscope.
  • the thickness of the glass layer, the thickness of the heat-resistant fiber body, and the penetration depth of the glass layer into the heat-resistant fiber body are average values measured at 15 points on the cut surface.
  • Viscosity ⁇ (unit: dPa ⁇ s) at the use temperature T of the glass forming the glass layer is obtained by putting a glass having the same composition as the glass into a platinum crucible and melting it, and rotating a viscometer (manufactured by Motoyama). And measured.
  • the contact angle ⁇ b at the use temperature T was measured using a high-temperature contact angle meter (manufactured by Cruz).
  • Examples 1 to 5 a glass layer was formed on the outer surface of the platinum alloy crucible, and the heat flow of the glass layer was suppressed by the heat resistant fiber body. Further, the glass layer contained voids that were not in communication with the outside air and were open to the member. Therefore, it can be seen that in Examples 1 to 5, the proportion of bubbles contained in the molten glass is smaller than in Examples 6 to 12.
  • Example 7 since the heat-resistant fiber body was not used, the glass layer thermally flowed downward due to its own weight, and a part of the glass layer was separated from the crucible.
  • Example 9 since the viscosity ⁇ at the use temperature T of the glass forming the glass layer was less than 10 2.5 dPa ⁇ s, the glass layer thermally flowed downward due to its own weight, and a part thereof was separated from the crucible. .

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Abstract

L'appareil pour le traitement du verre fondu ci-décrit comprend un élément à base de platine ou d'un alliage de platine et ayant une surface intérieure en contact avec un verre fondu, une couche de verre qui recouvre au moins une partie d'une surface extérieure dudit élément, et un matériau fibreux thermorésistant dans lequel l'extérieur au moins de ladite couche de verre est perméée. Le matériau fibreux thermorésistant comprend des fibres de verre ou des fibres céramiques et a une teneur en SiO2 de 50 % en poids ou plus en termes de teneur d'oxyde, le verre qui forme la couche de verre a une viscosité de 102.5 dPa·s ou plus à une température d'utilisation, et la couche de verre contient une lame d'air qui n'est pas en communication avec l'air extérieur.
PCT/JP2011/059753 2010-04-28 2011-04-20 Appareil pour le traitement du verre fondu, son procédé de production, et utilisation WO2011136109A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2012512803A JP5692223B2 (ja) 2010-04-28 2011-04-20 溶融ガラス処理装置、その製造方法、およびその用途
KR1020127028007A KR20130080781A (ko) 2010-04-28 2011-04-20 용융 유리 처리 장치, 그의 제조 방법, 및 그의 용도
CN201180021089.4A CN102869621B (zh) 2010-04-28 2011-04-20 熔融玻璃处理装置、其制造方法及其用途

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010104350 2010-04-28
JP2010-104350 2010-04-28

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WO2011136109A1 true WO2011136109A1 (fr) 2011-11-03

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WO2012048812A1 (fr) * 2010-10-11 2012-04-19 Heraeus Materials Technology Gmbh & Co. Kg Réduction des pertes par évaporation de pt et rh à des températures élevées par utilisation d'une couche barrière
WO2012048811A1 (fr) * 2010-10-11 2012-04-19 Heraeus Materials Technology Gmbh & Co. Kg Réduction des taux d'évaporation de platine et d'alliages de pt
JP2012101970A (ja) * 2010-11-09 2012-05-31 Nippon Electric Glass Co Ltd 溶融ガラス移送管
JP2013035726A (ja) * 2011-08-10 2013-02-21 Nippon Electric Glass Co Ltd ガラスの製造装置及びそれを用いたガラス製造方法
DE102013209785A1 (de) 2013-05-27 2014-11-27 Heraeus Materials Technology Gmbh & Co. Kg Edelmetall-Abdampfsperre
WO2015002148A1 (fr) * 2013-07-03 2015-01-08 株式会社フルヤ金属 Contenant et procédé de récupération d'élément métallique
JP2015523953A (ja) * 2012-05-29 2015-08-20 コーニング インコーポレイテッド 縁辺誘導手段を用いるガラス成形装置および方法
JP2020524216A (ja) * 2017-06-19 2020-08-13 コーニング インコーポレイテッド 耐火性物品、酸化還元反応を防止するためのコーティング組成物、及び耐火性物品の製造方法
WO2021133535A1 (fr) * 2019-12-24 2021-07-01 Corning Incorporated Appareil de fabrication de verre et procédés de traitement d'un matériau fondu

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US9475720B2 (en) * 2012-11-26 2016-10-25 Corning Incorporated System and method for restricting inward hydrogen permeation in a glass manufacturing system
JP6939781B2 (ja) * 2016-06-17 2021-09-22 Ａｇｃ株式会社 セラミックス被膜付部材およびそれを用いたガラス製品の生産設備
KR102527835B1 (ko) * 2017-11-21 2023-05-03 에이지씨 가부시키가이샤 용융 유리 반송 장치, 유리 제조 장치 및 유리 제조 방법

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WO2006030738A1 (fr) * 2004-09-13 2006-03-23 Tanaka Kikinzoku Kogyo K.K. Materiau de traitement de surface pour surface de platine, surface de platine traitee avec un tel materiau, et dispositif de fabrication de verre
JP2007077004A (ja) * 2005-08-19 2007-03-29 Nippon Electric Glass Co Ltd ガラス熔融用耐熱材、ガラス物品製造装置及びガラス物品の製造方法
WO2010024940A2 (fr) * 2008-08-29 2010-03-04 Corning Incorporated Revêtement protecteur et procédé

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US7032412B2 (en) * 2003-03-13 2006-04-25 Corning Incorporated Methods of manufacturing glass sheets with reduced blisters
JP4977965B2 (ja) * 2005-05-02 2012-07-18 旭硝子株式会社 無アルカリガラスおよびその製造方法
KR20080036163A (ko) * 2005-08-19 2008-04-25 니폰 덴키 가라스 가부시키가이샤 유리 용융용 내열재, 유리 물품 제조 장치 및 유리 물품의제조 방법

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JP2004523449A (ja) * 2000-11-30 2004-08-05 カール−ツァイス−スティフツング ガラス製造用被覆金属部品
WO2006030738A1 (fr) * 2004-09-13 2006-03-23 Tanaka Kikinzoku Kogyo K.K. Materiau de traitement de surface pour surface de platine, surface de platine traitee avec un tel materiau, et dispositif de fabrication de verre
JP2007077004A (ja) * 2005-08-19 2007-03-29 Nippon Electric Glass Co Ltd ガラス熔融用耐熱材、ガラス物品製造装置及びガラス物品の製造方法
WO2010024940A2 (fr) * 2008-08-29 2010-03-04 Corning Incorporated Revêtement protecteur et procédé

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012048812A1 (fr) * 2010-10-11 2012-04-19 Heraeus Materials Technology Gmbh & Co. Kg Réduction des pertes par évaporation de pt et rh à des températures élevées par utilisation d'une couche barrière
WO2012048811A1 (fr) * 2010-10-11 2012-04-19 Heraeus Materials Technology Gmbh & Co. Kg Réduction des taux d'évaporation de platine et d'alliages de pt
JP2013539744A (ja) * 2010-10-11 2013-10-28 ヘレーウス マテリアルズ テクノロジー ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト 白金及び白金合金からの蒸発速度の低下
JP2013540686A (ja) * 2010-10-11 2013-11-07 ヘレーウス マテリアルズ テクノロジー ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト 遮断層を用いることによる、高温下でのＰｔ及びＲｈ蒸発損失の低減
JP2012101970A (ja) * 2010-11-09 2012-05-31 Nippon Electric Glass Co Ltd 溶融ガラス移送管
JP2013035726A (ja) * 2011-08-10 2013-02-21 Nippon Electric Glass Co Ltd ガラスの製造装置及びそれを用いたガラス製造方法
US10029936B2 (en) 2012-05-29 2018-07-24 Corning Incorporated Apparatus for forming glass with edge directors and methods
JP2015523953A (ja) * 2012-05-29 2015-08-20 コーニング インコーポレイテッド 縁辺誘導手段を用いるガラス成形装置および方法
DE102013209785A1 (de) 2013-05-27 2014-11-27 Heraeus Materials Technology Gmbh & Co. Kg Edelmetall-Abdampfsperre
WO2015002148A1 (fr) * 2013-07-03 2015-01-08 株式会社フルヤ金属 Contenant et procédé de récupération d'élément métallique
JP2020524216A (ja) * 2017-06-19 2020-08-13 コーニング インコーポレイテッド 耐火性物品、酸化還元反応を防止するためのコーティング組成物、及び耐火性物品の製造方法
JP7265998B2 (ja) 2017-06-19 2023-04-27 コーニング インコーポレイテッド 耐火性物品、酸化還元反応を防止するためのコーティング組成物、及び耐火性物品の製造方法
JP7479526B2 (ja) 2017-06-19 2024-05-08 コーニング インコーポレイテッド 耐火性物品、酸化還元反応を防止するためのコーティング組成物、及び耐火性物品の製造方法
WO2021133535A1 (fr) * 2019-12-24 2021-07-01 Corning Incorporated Appareil de fabrication de verre et procédés de traitement d'un matériau fondu

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CN102869621B (zh) 2014-12-24
KR20130080781A (ko) 2013-07-15
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TW201200482A (en) 2012-01-01
TWI477465B (zh) 2015-03-21
CN102869621A (zh) 2013-01-09

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