WO2016031345A1 - Plaque de verre - Google Patents

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Publication number
WO2016031345A1
WO2016031345A1 PCT/JP2015/066932 JP2015066932W WO2016031345A1 WO 2016031345 A1 WO2016031345 A1 WO 2016031345A1 JP 2015066932 W JP2015066932 W JP 2015066932W WO 2016031345 A1 WO2016031345 A1 WO 2016031345A1
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WIPO (PCT)
Prior art keywords
glass
less
glass plate
light
ppm
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PCT/JP2015/066932
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English (en)
Japanese (ja)
Inventor
和田　直哉
博之 土屋
優作 松尾
裕 黒岩
Original Assignee
旭硝子株式会社
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.)
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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 KR1020177004769A priority Critical patent/KR20170048348A/ko
Priority to CN201580045248.2A priority patent/CN106573822A/zh
Priority to JP2016545007A priority patent/JPWO2016031345A1/ja
Publication of WO2016031345A1 publication Critical patent/WO2016031345A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
    • C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
    • C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
    • C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089—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
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
    • C03C3/093—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium containing zinc or zirconium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K2/00—Non-electric light sources using luminescence; Light sources using electrochemiluminescence
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements

Definitions

  • the present invention relates to a glass plate.
  • it relates to a highly transparent glass plate.
  • High transmission glass with high visible light transmittance is in demand for various applications.
  • visible light is efficiently used in architectural applications (interior materials, exterior materials), electronic applications (light guide materials for planar light emitting devices, so-called light guide plates), and other industrial applications (such as cover glass for photovoltaic power generation modules).
  • There are methods of use such as increasing the light utilization efficiency by transmitting light, or using it as a material that provides high designability (high-class feeling) because of high transmission.
  • Divalent iron has a larger light absorption coefficient than trivalent iron. Therefore, an oxidizing agent is added to the glass raw material of the glass plate in order to minimize the proportion of divalent iron in the total iron.
  • the present invention has been made in view of the above problems, and has as its main object to provide a glass plate with reduced light chromaticity difference.
  • a glass plate having an absorbance ratio (A2 / A1) of an average absorbance (A2) in a wavelength range from 490 nm to 780 nm to an average absorbance (A1) in a wavelength range from 380 nm to 490 nm is from 0.4 to 4.5.
  • a highly transmissive glass plate with reduced light chromaticity difference is provided.
  • FIG. 1 is a diagram illustrating a liquid crystal display device according to an embodiment of the present invention.
  • the liquid crystal display device includes a liquid crystal panel 10, a glass plate 20 as a light guide plate facing the liquid crystal panel 10, and a light source 30 that irradiates the liquid crystal panel 10 with light through the glass plate 20.
  • the liquid crystal panel 10 includes, for example, an array substrate, a color filter substrate, and a liquid crystal layer.
  • the array substrate includes a substrate and an active element (for example, TFT) formed on the substrate.
  • the color filter substrate includes a substrate and a color filter formed on the substrate.
  • the liquid crystal layer is formed between the array substrate and the color filter substrate.
  • the glass plate 20 faces the liquid crystal panel 10.
  • the glass plate 20 is disposed behind the liquid crystal panel 10.
  • a surface (rear surface) 13 opposite to the display surface (front surface) 11 of the liquid crystal panel 10 and a front surface 21 of the glass plate 20 are arranged in parallel.
  • the reflective dots 40 and the like are formed on the rear surface 23 of the glass plate 20 in order to reduce luminance unevenness.
  • the rear surface 23 of the glass plate 20 may be formed in an uneven shape, and a plurality of lenses may be formed on the rear surface 23 of the glass plate 20.
  • the rear surface 23 of the glass plate 20 is parallel to the front surface 21 of the glass plate 20.
  • the light source 30 irradiates light to the end face 26 of the glass plate 20.
  • Light from the light source 30 enters the inside from the end face 26 of the glass plate 20, repeats surface reflection and spreads throughout the inside, exits from the surface (front surface) 21 of the glass plate 20 facing the liquid crystal panel 10, and exits the liquid crystal panel 10. Illuminate evenly from behind.
  • a scattering film, a brightness enhancement film, a reflective polarizing film, a 3D film, a polarizing plate and the like may be disposed between the glass plate 20 and the liquid crystal panel 10.
  • a reflective film or the like may be disposed behind the glass plate 20.
  • the white LED may be composed of, for example, a blue LED and a phosphor that receives and emits light from the blue LED.
  • the phosphor include YAG, oxide, aluminate, nitride, oxynitride, sulfide, oxysulfide, rare earth oxysulfide, halophosphate, and chloride.
  • a white LED may be composed of a blue LED and a yellow phosphor.
  • white LED may be comprised by blue LED, green fluorescent substance, and red fluorescent substance. Since the light from the latter white LED is a mixture of the three primary colors of light, it is more excellent in color rendering.
  • FIG. 2 is a diagram showing an example of a light spectrum of a white LED composed of a blue LED and a yellow phosphor.
  • FIG. 3 is a diagram illustrating an example of a light spectrum of a white LED composed of a blue LED, a green phosphor, and a red phosphor. 2 to 3, the horizontal axis represents the wavelength ⁇ (nm), and the vertical axis represents the intensity I.
  • the light spectrum of a white LED composed of a blue LED and a phosphor becomes a minimum near 490 nm. From this, it can be seen that light in the wavelength range from 380 nm to less than 490 nm is mainly light from the blue LED, and light in the wavelength range from 490 nm to 780 nm is mainly light from the phosphor.
  • the glass plate 20 of the present embodiment has an absorbance ratio (A2 / A1) of an average absorbance (A2) in a wavelength range of 490 nm to 780 nm to 0.44 to an average absorbance (A1) in a wavelength range of 380 nm to 490 nm. 4.5.
  • the absorbance ratio (A2 / A1) is preferably 0.5 to 4.0, more preferably 0.6 to 3.5, and still more preferably 0.9 to 2.0.
  • the absorbance ratio (A1 / A2) is substantially constant regardless of the optical path length, but may be represented by a value in the case of an optical path length of 200 mm.
  • the absorbance A ( ⁇ ) of the glass plate at the wavelength ⁇ is calculated from the following formula (1).
  • the absorbance A ( ⁇ ) is the absorbance when the optical path length of the glass plate is 200 mm.
  • the reason why 200 mm is set as the optical path length of the glass plate is that the larger the size of the glass plate, the larger the chromaticity difference between the emitted light at a position closer to the light source and the emitted light at a position far from the light source, and the size of the glass plate is larger. This is because the chromaticity difference is particularly noticeable at 200 mm or more.
  • A1 is preferably 0.1 or less, more preferably 0.07 or less, and particularly preferably 0.05 or less.
  • A2 is preferably 0.15 or less, more preferably 0.12 or less, and particularly preferably 0.1 or less.
  • T ( ⁇ ) is a transmittance of light (wavelength ⁇ ) traveling in the longitudinal direction of a glass cuboid having a square cross section at a temperature of 25 ° C., and is measured by a spectrophotometer.
  • the cross-sectional shape perpendicular to the longitudinal direction of the glass cuboid is a square having a side of 10 mm, and the longitudinal dimension of the glass cuboid is 200 mm.
  • the glass cuboid is mirror-polished on all six planes and is uniform without a different refractive index layer.
  • the spectrophotometer is used, for example, by combining a spectrophotometer UH4150 manufactured by Hitachi High-Technologies Corporation with a detector manufactured by the company capable of measuring a sample having an optical path length of 200 mm and receiving light with an integrating sphere.
  • the measurement wavelength ranges from 380 nm to 780 nm and is measured at 1 nm intervals.
  • the light transmittance is obtained as a ratio of the light intensity after passing through the sample to the light intensity before entering the sample.
  • R ( ⁇ ) is the reflectance on one side of the sample, and is calculated from the following equation (3).
  • n ( ⁇ ) is the refractive index of the glass at the wavelength ⁇ .
  • the refractive index at each wavelength of at least g-line (435.8 nm), F-line (486.1 nm), e-line (546.1 nm), d-line (587.6 nm), and C-line (656.3 nm) is determined by the V-block method.
  • a precision refractometer KPR-2000 manufactured by Shimadzu Corporation and based on those values, each coefficient B 1 , B 2 , B 3 , C 1 of Sellmeier's dispersion formula (the following formula (4)), N ( ⁇ ) is obtained by determining C 2 and C 3 by the method of least squares.
  • the average absorbance is an average value of absorbance in a predetermined wavelength range.
  • the average absorbance (A1, A2) and the absorbance ratio (A1 / A2) described in the claims are calculated using the above formula (1) and the like.
  • trivalent iron has a larger average absorbance in a wavelength range of 380 nm or more and less than 490 nm compared to divalent iron.
  • bivalent iron has a higher average absorbance in the wavelength range of 490 nm to 780 nm than trivalent iron.
  • the ratio of divalent iron in the total iron is not reduced as much as possible, but the absorbance ratio (A2 / A1) is adjusted to 0.4 to 4.5 by appropriately adjusting the ratio. To do. Thereby, the chromaticity difference (it mentions later in detail) of the light from the glass plate 20 can be reduced.
  • the proportion of divalent iron in the total iron is represented by iron redox.
  • Iron redox the mass of the bivalent iron terms of Fe 2 O 3 shows the rate at percentage relative to the mass of total iron as calculated as Fe 2 O 3.
  • Total iron is the sum of divalent iron and trivalent iron.
  • the ratio of divalent iron to trivalent iron is obtained by a Mossbauer absorption spectrum measured at 25 ° C. The smaller the iron redox, the smaller the proportion of divalent iron in the total iron.
  • the inventors change or change the melting conditions of the glass raw material of the glass plate 20 (for example, the maximum temperature during melting of the glass raw material, the dew point of the atmosphere in the melting furnace) by experiments or the like. It discovered that the iron redox of the glass plate 20 could be adjusted by adjusting the addition amount of an agent appropriately.
  • the oxidizing agent for example, antimony oxide, cerium oxide, nitrate or the like is used.
  • the lower the maximum temperature at the time of melting the glass raw material the more difficult the oxygen escapes from the molten glass, the molten glass becomes in an oxidized state, the iron in the molten glass is oxidized, and the iron redox is small.
  • Iron redox is, for example, 3-30%. If the iron redox is 3 to 30%, the absorbance ratio (A2 / A1) can be easily set to 0.4 to 4.5.
  • the iron redox is preferably 3.5 to 27%, more preferably 4 to 24%, still more preferably 6 to 14%.
  • FIG. 4 is a diagram showing a simulation analysis model according to an embodiment of the present invention.
  • the size of the glass plate 20A is 10 mm ⁇ 600 mm, and the thickness of the glass plate 20A is 2 mm.
  • the tendency of the results does not depend on the size or thickness.
  • a surface light source 30A parallel to the end face 26A was provided at a position 1 mm away from one end face 26A among the end faces 26A, 27A (size 2 mm ⁇ 10 mm, distance 600 mm) of the glass plate 20A. Even if a plurality of point light sources are arranged without using the light source as a surface light source, the tendency of the result does not change.
  • the light spectrum of the surface light source 30A the light spectrum of a white LED composed of a blue LED, a red phosphor, and a green phosphor was used.
  • the number of light rays incident on the end surface 26A of the glass plate 20A from the surface light source 30A was 100,000.
  • the value when the optical path length is 200 mm was calculated using the above equation (1).
  • the measured value of a rectangular parallelepiped sample having a size of 10 mm ⁇ 10 mm ⁇ 200 mm was used as the transmittance T ( ⁇ ).
  • the refractive index n ( ⁇ ) was obtained by determining each coefficient of the Sellmeier dispersion formula (the above formula (4)) based on the actually measured value (see Table 1).
  • the chromaticity of incident light and guided light is represented on the u′v ′ chromaticity diagram defined in 1976 by the CIE (International Commission on Illumination). Let the average chromaticity coordinates of incident light be (u ′ 1 , v ′ 1 ), and the average chromaticity coordinates of guided light be (u ′ 2 , v ′ 2 ).
  • Tables 2 to 4 and FIGS. 5 to 7 The simulation analysis results are shown in Tables 2 to 4 and FIGS.
  • Tables 2 to 4 and FIGS. 5 to 7 the absorbance is represented by the value when the optical path length is 200 mm as described above.
  • Table 2 and FIG. 5 show an example of the relationship between the absorbance ratio and the chromaticity difference when the total iron content is 20 ppm by mass.
  • Table 3 and FIG. 6 show an example of the relationship between the absorbance ratio and the chromaticity difference when the total iron amount is 40 mass ppm.
  • Table 4 and FIG. 7 show an example of the relationship between the absorbance ratio and the chromaticity difference when the total iron content is 70 mass ppm.
  • the total iron amount is the ratio of total iron in the glass plate 20A, and indicates the ratio of total iron converted to Fe 2 O 3 .
  • the total iron content is also called the total iron oxide content.
  • this invention is not limited to the said embodiment etc., In the range of the summary of this invention described in the claim, various deformation
  • the chemical composition of the glass plate of this invention may be various, it may be the following glass composition, for example.
  • Examples 1 to 15 of the glass composition of the present invention are shown in Tables 5 and 6 (only Fe 2 O 3 and CeO 2 are expressed in mass ppm, and the others are expressed in mass percentage).
  • Typical examples of the composition of the glass plate include the following three types (glass having glass composition A, glass composition B, and glass composition C).
  • the glass composition in the glass of this invention is not limited to the example of the glass composition shown here.
  • a glass plate having glass composition A SiO 2 is 60 to 80%, Al 2 O 3 is 0 to 7%, MgO is 0 to 10%, and CaO is 0 to 20% in terms of mass percentage based on oxide.
  • the SrO 0 ⁇ 15%, a BaO 0 ⁇ 15%, a Na 2 O 3 ⁇ 20%, the K 2 O 0 ⁇ 10% it is preferable that the containing Fe 2 O 3 5 ⁇ 100ppm.
  • the refractive index at room temperature of d-line (wavelength: 587.6 nm) of helium in the glass is 1.45 to 1.60. Specific examples include Examples 1 to 4 in Table 5 and Example 15 in Table 6.
  • the oxide-based mass percentage display is 45 to 80% SiO 2 , Al 2 O 3 is more than 7% and 30% or less, and B 2 O 3 is 0 to 15%.
  • MgO 0-15%, CaO 0-6%, SrO 0-5%, BaO 0-5%, Na 2 O 7-20%, K 2 O 0-10%, ZrO 2 It preferably contains 0 to 10% and 5 to 100 ppm of Fe 2 O 3 .
  • the refractive index at room temperature of d-line (wavelength: 587.6 nm) of helium in the glass is, for example, 1.45 to 1.60.
  • the glass composition is easy to ion exchange and easy to chemically strengthen. Specific examples include, for example, Examples 5 to 11 in Tables 5 and 6.
  • SiO 2 is 45 to 70%
  • Al 2 O 3 is 10 to 30%
  • B 2 O 3 is 0 to 15%
  • CaO, SrO and BaO in total 5 to 30%, Li 2 O, Na 2 O and K 2 O in total 0% or more and less than 3% and Fe 2 O 3 in 5 to 100 ppm are preferable.
  • the refractive index at room temperature of d-line (wavelength: 587.6 nm) of helium in the glass is, for example, 1.45 to 1.60. Specific examples include Examples 12 to 14 in Table 6.
  • SiO 2 is a main component of glass.
  • the content of SiO 2 is preferably 60% or more, more preferably 63% or more in the glass composition A in terms of the oxide-based mass percentage.
  • composition B it is preferably 45% or more, more preferably 50% or more
  • glass composition C it is preferably 45% or more, more preferably 50% or more.
  • the content of SiO 2 is easy to dissolve and the foam quality is good, and the content of divalent iron (Fe 2+ ) in the glass is kept low, and the optical properties are good.
  • the glass composition A preferably 80% or less, more preferably 75% or less
  • in the glass composition B preferably 80% or less, more preferably 70% or less
  • in the glass composition C Preferably 70% or less, more preferably 65% or less.
  • Al 2 O 3 is an essential component for improving the weather resistance of glass in the glass compositions B and C.
  • the content of Al 2 O 3 is preferably 1% or more, more preferably 2% or more in the glass composition A, and the glass composition In B, it is preferably more than 7%, more preferably 10% or more, and in the glass composition C, it is preferably 10% or more, more preferably 13% or more.
  • the content of Al 2 O 3 is preferably in the glass composition A. Is 7% or less, more preferably 5% or less.
  • the glass composition B preferably 30% or less, more preferably 23% or less.
  • the glass composition C preferably 30% or less, more preferably 20% or less.
  • B 2 O 3 is a component that promotes melting of the glass raw material and improves mechanical properties and weather resistance, but it does not cause inconveniences such as generation of striae due to volatilization and furnace wall erosion.
  • the content of B 2 O 3 is preferably 5% or less, more preferably 3% or less.
  • the content is preferably 15% or less, more preferably 12%. % Or less.
  • Alkali metal oxides such as Li 2 O, Na 2 O, and K 2 O are useful components for accelerating melting of glass raw materials and adjusting thermal expansion, viscosity, and the like. Therefore, in the glass composition A, the content of Na 2 O is preferably 3% or more, more preferably 8% or more. In the glass composition B, the content of Na 2 O is preferably 7% or more, more preferably 10% or more. However, the content of Na 2 O is preferably 20% or less in the glass compositions A and B in order to maintain the clarity during melting and maintain the foam quality of the produced glass, and 15% More preferably, the glass composition C is 3% or less, more preferably 1% or less in the glass composition C.
  • the content of K 2 O is preferably 10% or less, more preferably 7% or less in the glass compositions A and B, and preferably 2% or less, more preferably 1% in the glass composition C. It is as follows. Further, Li 2 O is an optional component, but in order to facilitate vitrification, to keep the iron content contained as an impurity derived from the raw material low, and to keep the batch cost low, in glass compositions A, B and C , Li 2 O can be contained at 2% or less.
  • the total content of these alkali metal oxides maintains the clarification at the time of melting, and in order to maintain the foam quality of the produced glass, in the glass compositions A and B In the glass composition C, it is preferably 0% to 2%, more preferably 0% to 1%.
  • Alkaline earth metal oxides such as MgO, CaO, SrO, and BaO are useful components for accelerating melting of glass raw materials and adjusting thermal expansion, viscosity, and the like.
  • MgO has the effect of lowering the viscosity during glass melting and promoting the melting.
  • action which reduces specific gravity and makes a glass plate hard to be wrinkled, it can be contained in glass composition A, B, and C.
  • the content of MgO in the glass composition A is preferably 10% or less, more preferably 8% or less.
  • composition B it is preferably 15% or less, more preferably 12% or less
  • glass composition C it is preferably 10% or less, more preferably 5% or less.
  • CaO is a component that promotes melting of the glass raw material and adjusts viscosity, thermal expansion, and the like, and therefore can be contained in the glass compositions A, B, and C.
  • the content of CaO is preferably 3% or more, more preferably 5% or more.
  • the glass composition A is preferably 20% or less, more preferably 10% or less, and the glass composition B is preferably 6% or less, more preferably 4% or less.
  • SrO has the effect of increasing the thermal expansion coefficient and lowering the high temperature viscosity of the glass.
  • SrO can be contained in the glass compositions A, B and C.
  • the SrO content in the glass compositions A and C is preferably 15% or less, more preferably 10% or less, and in the glass composition B It is preferably 5% or less, and more preferably 3% or less.
  • BaO like SrO, has the effect of increasing the coefficient of thermal expansion and lowering the high temperature viscosity of the glass.
  • BaO can be contained in the glass compositions A, B, and C.
  • it is preferably 15% or less in the glass compositions A and C, more preferably 10% or less, and 5% or less in the glass composition B. Of these, 3% or less is more preferable.
  • the total content of these alkaline earth metal oxides is preferably 10 in the glass composition A in order to keep the coefficient of thermal expansion low, good devitrification properties, and maintain strength.
  • % To 30% more preferably 13% to 27%.
  • the glass composition B preferably 1% to 15%, more preferably 3% to 10%
  • the glass composition C preferably 5%.
  • % To 30% more preferably 10% to 20%.
  • ZrO 2 is an optional component
  • the glass compositions A, B and C are 10% or less, preferably 5%. You may make it contain below. However, if it exceeds 10%, the glass tends to be devitrified, which is not preferable.
  • the amount of Fe 2 O 3 refers to the total iron oxide content in terms of Fe 2 O 3.
  • the total iron oxide content is preferably 5 to 50 ppm by mass, more preferably 5 to 30 ppm by mass.
  • the total iron oxide content is less than 5 ppm, the infrared absorption of the glass becomes extremely poor, it is difficult to improve the meltability, and it is not preferable because it takes a lot of cost to refine the raw material. .
  • the total iron oxide content exceeds 100 ppm, the coloration of the glass increases, and the visible light transmittance decreases, which is not preferable.
  • the glass of the glass plate of the present invention may contain SO 3 as a fining agent.
  • the SO 3 content is preferably more than 0% and 0.5% or less in terms of mass percentage. 0.4% or less is more preferable, 0.3% or less is more preferable, and 0.25% or less is further preferable.
  • the glass of the glass plate of the present invention may contain one or more of Sb 2 O 3, SnO 2 and As 2 O 3 as an oxidizing agent and a clarifying agent.
  • the content of Sb 2 O 3 , SnO 2 or As 2 O 3 is preferably 0 to 0.5% in terms of mass percentage. 0.2% or less is more preferable, 0.1% or less is more preferable, and it is further more preferable not to contain substantially.
  • Sb 2 O 3 , SnO 2 and As 2 O 3 act as an oxidizing agent for glass, they may be added within the above range for the purpose of adjusting the amount of Fe 2+ in the glass.
  • As 2 O 3 is not positively contained from the environmental viewpoint.
  • the glass of the glass plate of the present invention may contain NiO.
  • NiO functions also as a coloring component
  • the content of NiO is preferably 10 ppm or less with respect to the total amount of the glass composition described above.
  • NiO is preferably 1.0 ppm or less, and more preferably 0.5 ppm or less, from the viewpoint of not reducing the internal transmittance of the glass plate at a wavelength of 400 to 700 nm.
  • the glass of the glass plate of the present invention may contain Cr 2 O 3 .
  • Cr 2 O 3 When Cr 2 O 3 is contained, Cr 2 O 3 also functions as a coloring component. Therefore, the content of Cr 2 O 3 is preferably 10 ppm or less with respect to the total amount of the glass composition described above.
  • Cr 2 O 3 is preferably 1.0 ppm or less, more preferably 0.5 ppm or less, from the viewpoint of not reducing the internal transmittance of the glass plate at a wavelength of 400 to 700 nm.
  • the glass of the glass plate of the present invention may contain MnO 2 .
  • MnO 2 is contained, since MnO 2 functions also as a component that absorbs visible light, the content of MnO 2 is preferably 50 ppm or less with respect to the total amount of the glass composition described above.
  • MnO 2 is preferably 10 ppm or less from the viewpoint of not reducing the internal transmittance of the glass plate at a wavelength of 400 to 700 nm.
  • the glass of the glass plate of the present invention may contain TiO 2 .
  • TiO 2 When TiO 2 is contained, TiO 2 also functions as a component that absorbs visible light. Therefore, the content of TiO 2 is preferably 1000 ppm or less with respect to the total amount of the glass composition described above.
  • the content of TiO 2 is more preferably 500 ppm or less, and particularly preferably 100 ppm or less, from the viewpoint of not reducing the internal transmittance of the glass plate at a wavelength of 400 to 700 nm.
  • Glass of the glass plate of the present invention may contain CeO 2.
  • CeO 2 has the effect of reducing the redox of iron, and can reduce the absorption of glass at a wavelength of 400 to 700 nm.
  • the CeO 2 content is preferably 1000 ppm or less with respect to the total amount of the glass composition described above.
  • the CeO 2 content is more preferably 500 ppm or less, further preferably 400 ppm or less, particularly preferably 300 ppm or less, and most preferably 250 ppm or less.
  • the CeO 2 content must be adjusted so that the iron redox is 3 to 30%.
  • the glass of the glass plate of the present invention may contain at least one component selected from the group consisting of CoO, V 2 O 5 and CuO.
  • these components When these components are contained, they also function as components that absorb visible light, and therefore the content of the components is preferably 10 ppm or less with respect to the total amount of the glass composition described above. In particular, it is preferable that these components are not substantially contained so as not to lower the internal transmittance of the glass plate at a wavelength of 400 to 700 nm.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Glass Compositions (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

La présente invention concerne une plaque de verre qui présente un rapport d'absorbance de l'absorbance moyenne (A2) dans la plage de longueurs d'onde allant de 490 nm (inclus) à 780 nm (inclus) sur l'absorbance moyenne (A1) dans la plage de longueurs d'onde allant de 380 nm (inclus) à 490 nm (exclu), c'est-à-dire un rapport d'absorbance (A2/A1), qui va de 0,4 à 4,5.
PCT/JP2015/066932 2014-08-28 2015-06-11 Plaque de verre WO2016031345A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020177004769A KR20170048348A (ko) 2014-08-28 2015-06-11 유리판
CN201580045248.2A CN106573822A (zh) 2014-08-28 2015-06-11 玻璃板
JP2016545007A JPWO2016031345A1 (ja) 2014-08-28 2015-06-11 ガラス板

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JP2014-174177 2014-08-28
JP2014174177 2014-08-28
JP2015-098888 2015-05-14
JP2015098888 2015-05-14

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WO2016031345A1 true WO2016031345A1 (fr) 2016-03-03

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JP (1) JPWO2016031345A1 (fr)
KR (1) KR20170048348A (fr)
CN (1) CN106573822A (fr)
TW (1) TW201607911A (fr)
WO (1) WO2016031345A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017185297A1 (fr) * 2016-04-28 2017-11-02 中国南玻集团股份有限公司 Verre pour plaque de guidage de lumière
JP2018048073A (ja) * 2016-09-22 2018-03-29 ショット アクチエンゲゼルシャフトＳｃｈｏｔｔ ＡＧ アルミニウム不含ホウケイ酸ガラス
WO2018101220A1 (fr) * 2016-12-01 2018-06-07 旭硝子株式会社 Plaque de verre
WO2018159385A1 (fr) * 2017-02-28 2018-09-07 日本電気硝子株式会社 Plaque de guidage de lumière
JP2019510715A (ja) * 2016-06-13 2019-04-18 エルジー・ケム・リミテッド ガラス導光板及びその製造方法
WO2019198363A1 (fr) * 2018-04-09 2019-10-17 日本電気硝子株式会社 Panneau de guidage de lumière
US11161769B2 (en) 2016-09-16 2021-11-02 Corning Incorporated High transmission glasses with alkaline earth oxides as a modifier

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JP2001261366A (ja) * 2000-03-22 2001-09-26 Nippon Electric Glass Co Ltd 液晶ディスプレイ用ガラス基板及び液晶ディスプレイ
JP2003137593A (ja) * 2001-10-24 2003-05-14 Central Glass Co Ltd セレン含有着色ソーダ石灰シリカガラスの製造方法
JP2004252383A (ja) * 2003-02-21 2004-09-09 Mitsui Chemicals Inc 反射体用基板及びそれを用いた反射体、サイドライト型バックライト装置、液晶表示装置
JP2012501285A (ja) * 2008-09-01 2012-01-19 サン−ゴバン グラス フランス ガラスを得るための方法及び得られたガラス
WO2013004470A2 (fr) * 2011-07-04 2013-01-10 Agc Glass Europe Feuille de verre flotte a haute transmission energetique
WO2013061479A1 (fr) * 2011-10-24 2013-05-02 セントラル硝子株式会社 Couvre-objet de cellule solaire et son procédé de fabrication

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Publication number Priority date Publication date Assignee Title
JP2001261366A (ja) * 2000-03-22 2001-09-26 Nippon Electric Glass Co Ltd 液晶ディスプレイ用ガラス基板及び液晶ディスプレイ
JP2003137593A (ja) * 2001-10-24 2003-05-14 Central Glass Co Ltd セレン含有着色ソーダ石灰シリカガラスの製造方法
JP2004252383A (ja) * 2003-02-21 2004-09-09 Mitsui Chemicals Inc 反射体用基板及びそれを用いた反射体、サイドライト型バックライト装置、液晶表示装置
JP2012501285A (ja) * 2008-09-01 2012-01-19 サン−ゴバン グラス フランス ガラスを得るための方法及び得られたガラス
WO2013004470A2 (fr) * 2011-07-04 2013-01-10 Agc Glass Europe Feuille de verre flotte a haute transmission energetique
WO2013061479A1 (fr) * 2011-10-24 2013-05-02 セントラル硝子株式会社 Couvre-objet de cellule solaire et son procédé de fabrication

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017185297A1 (fr) * 2016-04-28 2017-11-02 中国南玻集团股份有限公司 Verre pour plaque de guidage de lumière
JP2019510715A (ja) * 2016-06-13 2019-04-18 エルジー・ケム・リミテッド ガラス導光板及びその製造方法
US11161769B2 (en) 2016-09-16 2021-11-02 Corning Incorporated High transmission glasses with alkaline earth oxides as a modifier
JP2018048073A (ja) * 2016-09-22 2018-03-29 ショット アクチエンゲゼルシャフトＳｃｈｏｔｔ ＡＧ アルミニウム不含ホウケイ酸ガラス
JP2018172279A (ja) * 2016-09-22 2018-11-08 ショット アクチエンゲゼルシャフトＳｃｈｏｔｔ ＡＧ アルミニウム不含ホウケイ酸ガラス
US10570052B2 (en) 2016-09-22 2020-02-25 Schott Ag Aluminum-free borosilicate glass
WO2018101220A1 (fr) * 2016-12-01 2018-06-07 旭硝子株式会社 Plaque de verre
WO2018159385A1 (fr) * 2017-02-28 2018-09-07 日本電気硝子株式会社 Plaque de guidage de lumière
JPWO2018159385A1 (ja) * 2017-02-28 2020-01-16 日本電気硝子株式会社 導光板
WO2019198363A1 (fr) * 2018-04-09 2019-10-17 日本電気硝子株式会社 Panneau de guidage de lumière
JP2019182700A (ja) * 2018-04-09 2019-10-24 日本電気硝子株式会社 導光板
JP7429093B2 (ja) 2018-04-09 2024-02-07 日本電気硝子株式会社 導光板

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CN106573822A (zh) 2017-04-19
KR20170048348A (ko) 2017-05-08
JPWO2016031345A1 (ja) 2017-06-15
TW201607911A (zh) 2016-03-01

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