WO2007069729A1 - Substrat de verre avant pour ecran plasma et appareil a ecran plasma - Google Patents

Substrat de verre avant pour ecran plasma et appareil a ecran plasma Download PDF

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Publication number
WO2007069729A1
WO2007069729A1 PCT/JP2006/325070 JP2006325070W WO2007069729A1 WO 2007069729 A1 WO2007069729 A1 WO 2007069729A1 JP 2006325070 W JP2006325070 W JP 2006325070W WO 2007069729 A1 WO2007069729 A1 WO 2007069729A1
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WO
WIPO (PCT)
Prior art keywords
plasma display
glass substrate
wavelength
light
weight
Prior art date
Application number
PCT/JP2006/325070
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English (en)
Japanese (ja)
Inventor
Tatsuya Tsuzuki
Original Assignee
Central Glass Company, Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Central Glass Company, Limited filed Critical Central Glass Company, Limited
Publication of WO2007069729A1 publication Critical patent/WO2007069729A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
    • H01J11/20—Constructional details
    • H01J11/34—Vessels, containers or parts thereof, e.g. substrates
    • 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
    • C03C4/00—Compositions for glass with special properties
    • C03C4/08—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths
    • C03C4/082—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths for infrared absorbing glass

Definitions

  • the present invention has a near-infrared absorbing ability, an excellent light transmission performance in the visible wavelength region of 380 to 770 nm, particularly 380 to 480 nm, and further has heat resistance and an appropriate thermal expansion coefficient.
  • the present invention relates to a front glass substrate for plasma display and a plasma display device using the same.
  • a plasma display panel (hereinafter referred to as PDP) has a structure in which a discharge gas such as helium-xenon is enclosed in a discharge space formed between a pair of glass substrates. An electrode is formed on each substrate, and a discharge of the above-mentioned sealed gas in a desired discharge cell is generated by applying a predetermined voltage between the predetermined electrodes.
  • the ultraviolet rays generated by this discharge excite the phosphor formed in the discharge cell, and the visible light emitted from the excited phosphor constitutes the image display of the PDP.
  • color display is realized by forming a phosphor layer of red, green, or blue in each discharge cell.
  • the emission wavelengths of the red, green, and blue phosphors are red: 620 nm, green: 550 nm, and blue: 460 nm.
  • the discharge state of the discharge cell is controlled, the ultraviolet rays generated during the discharge are converted into visible light by the phosphor, and the desired image is displayed by transmitting the light through the front glass substrate force. .
  • the remote controller device and the device on the receiving side thereof are used to operate the PDP device itself. Forces not only related to the near infrared rays, but also other devices installed around the PDP device, such as video tape recorders and air conditioners There can be enough. Furthermore, near infrared rays are inevitably adversely affected by devices other than those using LEDs.
  • a glass substrate has been proposed that has 2 3 and the like and absorbs light before adjoining adjacent pixels (see, for example, Patent Documents 2 and 3).
  • Patent Document 1 JP 2001-139342 A
  • Patent Document 2 Japanese Patent Laid-Open No. 11-1342
  • Patent Document 3 Japanese Patent Laid-Open No. 11 171587
  • acid pig iron contains both divalent and trivalent iron in glass, and divalent iron oxide absorbs infrared rays but does not absorb light in the visible wavelength region, so there is no problem.
  • trivalent iron oxide has the problem of absorbing light in the visible wavelength region. For example, in the composition described in JP-A-2001-139342, the light transmittance of 380 to 480 nm is low.
  • the luminance of the blue light emitted by the phosphor is lowered when the transmittance of light of 380 to 480 nm of the front glass substrate is low. As a result, the color display balance becomes poor.
  • the blue phosphor of the PDP device has lower luminous efficiency than other phosphors, a front glass substrate that transmits the blue light emission wavelength as much as possible is desirable.
  • NiO or CoO as described in JP-A-11-1342
  • these components reduce the transmittance almost uniformly over the entire visible wavelength region. Therefore, it is preferable that the luminance of the image is reduced by absorbing light emitted by red, green, and blue phosphors. There is a risk of consequences.
  • Nd O is a very expensive raw material having a good transmittance in the visible wavelength region.
  • the PDP substrate needs to be a high strain point glass because it includes a heating step during panel fabrication. If the strain point is low, problems such as warpage occur during the process.
  • thermal expansion coefficient needs to be consistent with other members.
  • the properties required for the PDP substrate have various powers, and a glass composition that satisfies all of them has not yet been obtained.
  • the object of the present invention is to solve the above problems, suppress halation, have near-infrared absorption ability, and have excellent light transmission performance in the visible wavelength region of 380 to 770 nm, particularly 380 to 480 nm. It is another object of the present invention to provide a plasma display front glass substrate having a heat resistance and a thermal expansion coefficient suitable as a display substrate, and a plasma display device using the same.
  • the SiO force is 0 to 70
  • AlO is 0.5 to 5
  • the weight of the basic glass composition is 100% by weight as a coloring component and the basic glass composition is only ⁇ 5
  • iron oxide is contained in an amount of 0.25 to 0.80% by weight.
  • the weight ratio of divalent iron oxide to total iron oxide (weight of divalent iron oxide Z weight of total iron oxide) in pig iron is 0.25 to 0.55
  • a front glass substrate is provided.
  • the plasma display apparatus provided with said front glass substrate for plasma displays as a front glass substrate is provided.
  • FIG. 1 is a transmittance curve (plate thickness: 2.8 mm) between the glass of Example 1 and the glass of Comparative Example 1.
  • halation is suppressed, near-infrared absorbing ability is provided, and light transmission performance in the visible wavelength region of 380 to 770 nm, particularly 380 to 480 nm is excellent.
  • a front glass substrate for plasma display having a suitable heat resistance and thermal expansion coefficient as a substrate and a plasma display device using the same can be provided.
  • SiO is a main component of glass, and if it is less than 60% by weight,
  • the range is 60 to 70%, preferably 62 to 68%.
  • Al 2 O is a component that increases the strain point, and if the weight percent is less than 0.5, the effect is obtained.
  • the range of 0.5-5%, preferably 0.5-4, more preferably 0.5-3% is preferred.
  • Na 2 O is an essential component that acts as a flux when melting glass together with K 2 O. Less than 2%
  • the range is 2 to 6%, preferably 2 to 5%.
  • K 2 O exhibits the same effect as Na 2 O and has a mixed alkali effect with Na 2 O.
  • the range is preferably 10-14.
  • the total amount is made 10 to 20%.
  • the strain point, linear thermal expansion coefficient, high temperature viscosity and devitrification temperature can be maintained in appropriate ranges. If the total amount of alkali components is less than 10%, the coefficient of linear thermal expansion is too low.
  • the Young's modulus increases and the desired Young's modulus cannot be maintained. In addition, the devitrification tendency of glass increases. If it exceeds 20%, the strain point is lowered too much and the volume resistivity is lowered. Therefore, it is in the range of 10 to 20%, preferably 12 to 20%, more preferably 12 to 19%.
  • MgO has the effect of lowering the viscosity of the molten glass when the glass is melted and also has an increased strain point. Has the effect of raising. If it is less than 8%, their action is insufficient, and if it exceeds 15%, the tendency of devitrification of the glass increases and it becomes difficult to form molten glass. Accordingly, the range is 8 to 15%, preferably 8 to 14%, more preferably 8 to 13%.
  • CaO has the effect of lowering the viscosity of the molten glass at the time of melting the glass and the effect of increasing the strain point of the glass.
  • the range is 0 to 6%, preferably 0.5 to 5%, and more preferably 1 to 4%.
  • SrO is not an essential component, but has the action of reducing the high-temperature viscosity of the glass melt and suppressing the occurrence of devitrification in the presence of CaO. If it exceeds 5%, the density becomes too high, so a range of 5% or less, preferably 3% or less is desirable.
  • BaO is not an essential component, it has the effect of suppressing the devitrification tendency of the glass melt and has the effect of lowering the Young's modulus.
  • the range of 3% or less is desirable.
  • the total amount of divalent metal oxides RO (R is Mg, Ca, Sr, Ba) is in the range of 10 to 20%, so that the meltability of the glass is improved. While maintaining a good range, it is possible to obtain a glass having an appropriate range of thermal expansion coefficient by making the viscosity-temperature gradient moderate and improving the moldability of the glass, excellent in heat resistance, chemical durability, etc. . If the total RO is less than 10%, the high-temperature viscosity increases, making it difficult to melt and mold the glass. In addition, the strain point is lowered too much and the thermal expansion coefficient is lowered. On the other hand, if it exceeds 20%, the density increases, the tendency to devitrification increases, and the chemical durability decreases. Therefore, it is 10 to 20%, preferably 11 to 19, and more preferably 12 to 18%.
  • the ratio of R OZ (R O + R0) is preferably 0.40 or more. 0. If less than 4, trivalent iron oxide
  • the ratio of R 0 / (R O + R0) is 0.40 or more
  • Preferably it is 0.45 or more, more preferably 0.50 or more.
  • the ratio of MgOZRO (R is Mg, Ca, Sr, Ba) is 0.5.
  • R is Mg, Ca, Sr, Ba
  • the ratio of MgOZRO is 0.5 or more, preferably 0.60 or more.
  • ZrO has the effect of increasing the strain point of glass and improving the chemical durability of glass.
  • the range is 0.5 to 5%, preferably 1 to 3.5%.
  • Acid ferrous iron (iron oxide (II) and iron oxide (III)) is essential for imparting near-infrared absorption performance to glass, and is preferably 0.25 to 0.80%. If it is less than 0.25, sufficient near-infrared absorptivity cannot be imparted. On the other hand, if it exceeds 0.80, the visible light transmittance is remarkably lowered!
  • the weight ratio of the divalent iron oxide (iron oxide (II)) to the total amount of iron oxide (iron oxide ( ⁇ ) and iron oxide ( ⁇ )) Iron weight Z total iron oxide weight) is an important value that determines the balance between near infrared absorption performance and visible light transmission performance.If this value is less than 0.25, sufficient near infrared absorption performance cannot be obtained. However, the visible light transmittance is too low. On the other hand, if it exceeds 0.55, the near-infrared absorption performance is sufficient, but the absorption of near-infrared rays also affects visible light transmission, which is not preferable.
  • CoO may be contained up to a range of 25 ppm or less as another coloring component, but if CoO exceeds 25 ppm, visible light may be contained.
  • CoO content is 25ppm or less, preferably 20ppm or less, more preferably lOppm or less because the permeation performance deteriorates too much.
  • NiO is 80 ppm or less and MnO is 150 pp as other coloring components.
  • Se may be contained up to the range of lOppm or less. However, if NiO exceeds 80 ppm, the absorption wavelength of the blue phosphor becomes remarkably absorbed.
  • the glass of a preferred embodiment of the present invention has substantially the above component strength, but may contain other components in a total amount of up to 3% within a range not impairing the object of the present invention.
  • SO, Cl, F, As O, etc. may be added up to 1% in total to improve glass melting, fining and moldability.
  • TiO and CeO are used to prevent electron beam browning in PDPs. It may be contained up to 1% or up to 1% in total.
  • the glass substrate of the present invention has a transmittance T force of 850 nm or less when the thickness is 2.8 mm.
  • It has infrared absorption performance and has a transmittance of light with a wavelength of 550 nm.
  • the transmittance (T — T) of light with a long wavelength of 850 nm is 25% or more.
  • T force is 0% or more
  • T — T wavelength 850nm light transmittance
  • visible light since visible light has a high transmittance power S of 380 to 480 nm, it can have both near infrared absorption performance and high visible light transmission performance.
  • the transmittance T of light having a wavelength of 850 nm is preferably 50% or less, more preferably 45% or less.
  • the glass substrate of the present invention points forces consistency with other members in the plasma display panel during manufacture the thermal expansion coefficient is 70 ⁇ 90 X 10- 7 Z ° C, also the thermal deformation in the heat treatment Point force
  • the strain point is preferably 570 ° C or higher.
  • Silica sand acid aluminum, sodium carbonate, sodium sulfate, potassium carbonate, magnesium oxide, calcium carbonate, strontium carbonate, barium carbonate, zirconium silicate and ferric oxide (iron oxide ( ⁇ )),
  • iron oxide ( ⁇ ) iron oxide
  • a blended raw material consisting of cellulose powder as a reducing agent and cobalt oxide as another coloring component is used. Filled in a platinum crucible and melted by heating at 1400-1600 ° C for about 6 hours in an electric furnace. That is, the total amount of iron oxide was added in the form of iron (III) oxide.
  • the reducing agent was added. During the heating and melting, the glass melt was stirred with a platinum rod to homogenize the glass. [0039] Next, the molten glass was poured into a vertical mold to form a glass block, which was transferred to an electric furnace maintained at 450 to 650 ° C and gradually cooled in the furnace. The obtained glass was homogeneous without bubbles or striae. A sample was prepared by cutting this glass and polishing it to a thickness of 2.8 mm.
  • the transmittance was measured in the visible light region and the near infrared region, and the weight ratio of the divalent iron oxide to the total iron oxide (the divalent acid concentration).
  • Iron weight Z weight of total iron oxide
  • strain point strain point and coefficient of thermal expansion were measured. The results are shown in Table 1 and Table 2.
  • the weight ratio of divalent iron oxide to total iron oxide was measured by chemical analysis.
  • the strain point was measured by a beam bending method based on JIS R3103-2.
  • the expansion coefficient was determined by measuring the average linear expansion coefficient at 30 to 300 ° C. using a thermomechanical analyzer TMA8310 (manufactured by Rigaku Corporation).
  • Examples 1 to 10 in Table 1 are glasses of the present invention, and Comparative Example 15 in Table 2 is a conventional high strain point glass.
  • all the glass substrates of the present invention have high visible light, particularly high transmittance of 380 to 480 nm, and excellent near infrared absorption performance.
  • the strain point and the thermal expansion coefficient are values suitable for the front glass substrate for plasma display.
  • the glasses of Comparative Examples 1 to 4 have near-infrared absorption performance, but are inferior in transmission performance of visible light, particularly 380 to 480 nm.
  • the glass of Comparative Example 5 has a high visible light transmittance! /, But the near-infrared absorption performance is remarkably inferior.
  • FIG. 1 shows transmittance curves of the glass of Example 1 and the glass of Comparative Example 1. It can be seen from FIG. 1 that the glass of this example has the same amount of iron oxide as the glass of comparative example 1 and the same ratio of divalent iron oxide Z total iron oxide as the glass of comparative example 1. It is clear that it has the same near-infrared absorption performance and excellent light transmission performance of visible light, especially 380-480nm.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Glass Compositions (AREA)
  • Gas-Filled Discharge Tubes (AREA)

Abstract

La présente invention concerne un substrat de verre avant pour un usage dans un écran plasma, lequel comprend 100 % en poids d’une composition de verre de base et de 0,25 à 0,80 % en poids d'un composant d'oxyde de fer comme ingrédient de coloration, la composition de verre de base étant composée de 60 à 70 % en poids de SiO2, de 0,5 à 5 % en poids d’Al2O3, de 2 à 6 % en poids de Na2O, de 8 à 16 % en poids de K2O, de 10 à 20 % en poids de Na2O + K2O, de 8 à 15 % en poids de MgO, de 0 à 6 % en poids de CaO, de 0 à 5 % en poids de SrO, de 0 à 5 % en poids de BaO, de 10 à 20 % en poids de MgO + CaO + SrO + BaO et de 0,5 à 5 % en poids de ZrO2, et le rapport en poids d'un oxyde de fer divalent sur le poids total du composant d'oxyde de fer (le poids d’un oxyde de fer divalent/le poids total du composant d'oxyde de fer) étant de 0,25 à 0,55.
PCT/JP2006/325070 2005-12-16 2006-12-15 Substrat de verre avant pour ecran plasma et appareil a ecran plasma WO2007069729A1 (fr)

Applications Claiming Priority (2)

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JP2005-362970 2005-12-16
JP2005362970A JP2007161549A (ja) 2005-12-16 2005-12-16 プラズマディスプレイ用前面ガラス基板及びプラズマディスプレイ装置

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2206691A1 (fr) * 2007-11-06 2010-07-14 Asahi Glass Company, Limited Plaque de verre pour substrat
EP2233445A1 (fr) * 2007-12-26 2010-09-29 Central Glass Company, Limited Composition de verre
CN102414136A (zh) * 2009-04-28 2012-04-11 旭硝子株式会社 基板用玻璃板

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4962898B2 (ja) * 2006-08-30 2012-06-27 日本電気硝子株式会社 フラットパネルディスプレイ用ガラス基板

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001139342A (ja) * 1999-11-09 2001-05-22 Nippon Sheet Glass Co Ltd プラズマディスプレイ装置及びその前面ガラス基板
JP2003335547A (ja) * 2002-05-20 2003-11-25 Nippon Electric Glass Co Ltd フラットパネルディスプレイ装置用ガラス基板
JP2004277222A (ja) * 2003-03-17 2004-10-07 Nippon Electric Glass Co Ltd フラットパネルディスプレイ装置用ガラス基板
JP2005162536A (ja) * 2003-12-03 2005-06-23 Nippon Electric Glass Co Ltd フラットパネルディスプレイ装置用ガラス基板
JP2005343729A (ja) * 2004-06-02 2005-12-15 Central Glass Co Ltd ディスプレイ装置用基板ガラス

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001139342A (ja) * 1999-11-09 2001-05-22 Nippon Sheet Glass Co Ltd プラズマディスプレイ装置及びその前面ガラス基板
JP2003335547A (ja) * 2002-05-20 2003-11-25 Nippon Electric Glass Co Ltd フラットパネルディスプレイ装置用ガラス基板
JP2004277222A (ja) * 2003-03-17 2004-10-07 Nippon Electric Glass Co Ltd フラットパネルディスプレイ装置用ガラス基板
JP2005162536A (ja) * 2003-12-03 2005-06-23 Nippon Electric Glass Co Ltd フラットパネルディスプレイ装置用ガラス基板
JP2005343729A (ja) * 2004-06-02 2005-12-15 Central Glass Co Ltd ディスプレイ装置用基板ガラス

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2206691A1 (fr) * 2007-11-06 2010-07-14 Asahi Glass Company, Limited Plaque de verre pour substrat
EP2206691A4 (fr) * 2007-11-06 2010-12-29 Asahi Glass Co Ltd Plaque de verre pour substrat
US7951734B2 (en) 2007-11-06 2011-05-31 Asahi Glass Company, Limited Glass plate for substrate
EP2233445A1 (fr) * 2007-12-26 2010-09-29 Central Glass Company, Limited Composition de verre
EP2233445A4 (fr) * 2007-12-26 2014-01-01 Central Glass Co Ltd Composition de verre
CN102414136A (zh) * 2009-04-28 2012-04-11 旭硝子株式会社 基板用玻璃板
US8236717B2 (en) * 2009-04-28 2012-08-07 Asahi Glass Company, Limited Glass plate for substrate
CN102414136B (zh) * 2009-04-28 2015-05-06 旭硝子株式会社 基板用玻璃板

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