WO2011083791A1 - 蛍光材料および蛍光材料の製造方法 - Google Patents

蛍光材料および蛍光材料の製造方法 Download PDF

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Publication number
WO2011083791A1
WO2011083791A1 PCT/JP2011/050030 JP2011050030W WO2011083791A1 WO 2011083791 A1 WO2011083791 A1 WO 2011083791A1 JP 2011050030 W JP2011050030 W JP 2011050030W WO 2011083791 A1 WO2011083791 A1 WO 2011083791A1
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WIPO (PCT)
Prior art keywords
fluorescent material
alkali
glass
rare earth
free glass
Prior art date
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Ceased
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PCT/JP2011/050030
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English (en)
French (fr)
Japanese (ja)
Inventor
雅人 辻口
康彦 内海
容子 福嶋
昌弘 辰巳砂
清治 忠永
晃敏 林
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Sharp Corp
Osaka Metropolitan University
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Sharp Corp
Osaka Prefecture University PUC
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Priority to CN201180005587XA priority Critical patent/CN102712841A/zh
Publication of WO2011083791A1 publication Critical patent/WO2011083791A1/ja
Anticipated expiration legal-status Critical
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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
    • C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
    • 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
    • C03C4/12—Compositions for glass with special properties for luminescent glass; for fluorescent glass
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7715—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing cerium
    • C09K11/77214—Aluminosilicates
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source

Definitions

  • the present invention generally relates to a fluorescent material, and more specifically, to a fluorescent material using alkali-free glass as a raw material.
  • the present invention also relates to a method for producing the fluorescent material.
  • liquid crystal panel refers to one in which a liquid crystal material is injected and sealed inside two bonded glass substrates, and a polarizing plate (resin) is bonded to the outside of each glass substrate.
  • polarizing plate resin
  • liquid crystal display devices and liquid crystal panels contained in waste such as home appliances and information equipment are small in amount of waste, and after being crushed for each product in a waste treatment facility, plastic Along with shredder dust containing a large amount of waste, it is landfilled or incinerated.
  • Patent Document discloses a waste liquid crystal panel discharged from a liquid crystal panel manufacturing factory, a liquid crystal display device contained in wastes such as home appliances and information equipment, and a method for treating the liquid crystal panel. 1) discloses a method in which products are crushed at liquid crystal panel manufacturing plants and waste processing facilities and then put into a non-ferrous smelting furnace and processed as an alternative material for silica stone. . In this method, the glass component in the liquid crystal panel enters the slag.
  • Patent Document 2 discloses a method in which rare earth atoms are adsorbed on a porous glass produced from waste glass through high-temperature melting and high-temperature acid treatment, and then in the atmosphere or in a reducing atmosphere. A method for firing and producing a luminescent glass is disclosed.
  • the LCD panel is a display device that can contribute to power and resource savings, it is predicted that the production volume will increase rapidly and the display area will increase with the progress of the advanced information society. Along with this, the number and amount of waste liquid crystal panels are expected to increase rapidly in the future. Therefore, glass (liquid crystal panel glass) occupying most of the weight of the liquid crystal panel is preferably recycled from the viewpoint of reducing waste and valuing resources.
  • the method disclosed in Patent Document 1 is intended to be reused as a cement material, the liquid crystal panel glass becomes slag and cannot be recycled as the glass itself.
  • alkali-free glass glass called alkali-free glass is usually used for the liquid crystal panel glass.
  • the alkali-free glass is a special glass made so as to be compatible with the manufacturing process of the liquid crystal panel, and has a strain point of 650 ° C. or higher.
  • the strain point of soda lime glass widely used for glass products such as bottle glass, architectural window glass, glass fiber, and tableware glass is 550 ° C. or lower.
  • the strain points are different by 100 ° C. or more, it is possible to perform melting processing of alkali-free glass for recycling in a soda lime glass melting processing facility generally used for glass products. It is very difficult in terms of performance and heat resistance of the entire equipment.
  • Patent Document 2 produces porous glass by adding a predetermined proportion of a compound to glass waste and melting it at a high temperature, followed by treatment with a high-temperature acid. Furthermore, it is a method for obtaining a luminescent glass by adsorbing rare earth atoms to the produced porous glass and firing it in the air or in a reducing atmosphere. Since this method goes through a high-temperature melting step, there is a problem that a high melting temperature and a large amount of energy are consumed as a method for recycling alkali-free glass having a high processing temperature. In addition, since the acid treatment at a high temperature and the firing step are performed, the treatment is multistage and complicated.
  • the porous glass produced by this method contains only silica as a component, there is a limit to the dissolution concentration of rare earth ions, so that only limited emission intensity can be obtained.
  • the present invention has been made in order to solve the above-mentioned problems.
  • the purpose of the present invention is unnecessary, and it provides an application in which the recovered alkali-free glass can be effectively used as a resource. It is to provide the fluorescent material shown.
  • Another object of the present invention is to provide a method for producing a fluorescent material having strong emission intensity by using unnecessary alkali-free glass recovered as a raw material.
  • the fluorescent material of the present invention is characterized by comprising alkali-free glass and rare earth atoms.
  • the fluorescent material of the present invention preferably comprises 95 to 99.99% by weight of alkali-free glass and 0.01 to 5% by weight of rare earth atoms.
  • the alkali-free glass is obtained from liquid crystal panel glass.
  • the alkali-free glass is composed of SiO 2 : 50% by weight or more, Al 2 O 3 : 10 to 20% by weight, B 2 O 3 : 5 to 20% by weight, MgO + CaO + ZnO + SrO + BaO: 5 to 20% by weight. It is preferable that it has a composition.
  • the rare earth atom in the present invention preferably contains one or more atoms selected from Eu, Tb, Ce, Sm, Tm, Pr, and Er.
  • the present invention also provides a method for producing a fluorescent material, characterized in that alkali-free glass and a compound containing rare earth atoms are mixed and pulverized.
  • a fluorescent material of the present invention it is preferable that 95 to 99.99% by weight of alkali-free glass and 0.01 to 5% by weight of a compound containing rare earth atoms are mixed and pulverized.
  • the alkali-free glass and the compound containing rare earth atoms it is preferable to subject the alkali-free glass and the compound containing rare earth atoms to mechanical milling.
  • a container containing alkali-free glass, a compound containing rare earth atoms, and balls it is preferable to rotate a container containing alkali-free glass, a compound containing rare earth atoms, and balls.
  • the alkali-free glass in the method for producing a fluorescent material of the present invention is preferably obtained from liquid crystal panel glass.
  • the compound containing a rare earth atom contains one or more atoms selected from Eu, Tb, Ce, Sm, Tm, Pr, and Er as the rare earth atom.
  • the compound containing a rare earth atom contains one or more compounds selected from oxides, chlorides, hydroxides, nitrides, and sulfides of rare earth atoms.
  • the present invention can also provide a method for producing a fluorescent material. According to such a method of the present invention, it becomes possible to effectively use the alkali-free glass recovered from the liquid crystal panel that has become unnecessary as a fluorescent material. Since this method can produce a fluorescent material using alkali-free glass without performing high-temperature melting or the like, it provides a production method with low environmental load and low cost. In addition, the fluorescent material can be manufactured by a simple process, and an inexpensive fluorescent material can be obtained. Furthermore, according to this method, since a rare earth atom serving as a light emission center can be dissolved in glass at a high concentration, a high-performance fluorescent material can be manufactured.
  • FIG. 1 It is sectional drawing which shows typically the liquid crystal panel 1 provided with the alkali free glass used suitably for the fluorescent material of this invention. It is a graph which shows an example of the fluorescence spectrum when the fluorescent material obtained in Example 1 is excited by irradiation with ultraviolet light having a wavelength of 250 nm. It is a graph which shows an example of the fluorescence spectrum when irradiating and irradiating the ultraviolet light with a wavelength of 250 nm of the fluorescent material obtained in Example 2. FIG. It is a graph which shows an example of the fluorescence spectrum when the fluorescent material obtained in Example 3 is excited by irradiation with ultraviolet light having a wavelength of 250 nm.
  • the fluorescent material of the present invention is characterized by comprising alkali-free glass and rare earth atoms.
  • the alkali-free glass used in the present invention can be obtained by separating liquid crystal panel glass, which is desired to be effectively used as a resource, as a raw material for high-value-added fluorescent materials, and thus separated from liquid crystal panel glass. ,preferable.
  • the present inventors can use an alkali-free glass obtained by separating from a liquid crystal panel glass as a fluorescent material, and the fluorescent material manufactured using this as a raw material is used for a display device such as a PDP or a lighting device such as an LED. It has been found that it has characteristics that can. In the present invention, as long as it is non-alkali glass, it is not necessarily obtained by separating from liquid crystal panel glass.
  • the fluorescent material of the present invention comprises 95 to 99.99% by weight of alkali-free glass (preferably alkali-free glass obtained by separating from a liquid crystal panel) and 0.01 to 5% by weight of rare earth atoms.
  • alkali-free glass preferably alkali-free glass obtained by separating from a liquid crystal panel
  • rare earth atoms 0.01 to 5% by weight of rare earth atoms.
  • Fluorescent material uses intense ultraviolet light as an excitation source and emits strong light in the visible light region. Therefore, a high-performance base material that efficiently guides high-energy ultraviolet rays to the emission center is desired. In addition, in order to prevent deterioration in luminous efficiency, a base material having excellent thermal stability, chemical durability, mechanical strength, and optical characteristics is desired. Further, it is desired that the base material is a solid solution of a rare earth atom, which is a light emission center, at a high concentration.
  • the fluorescent material of the present invention is a material in which a non-alkali glass matrix material and a rare earth atom react by performing a mechanical milling treatment, as shown in a manufacturing method described later, and the rare earth atom is dissolved in the alkali-free glass. .
  • the fluorescent material of the present invention is a fluorescent material manufactured by mechanical milling without melting at high temperature, and a glass state can be obtained in a wide composition range. Therefore, it is a fluorescent material in a glass state in which a phosphor is dissolved, and has high efficiency, thermal stability, chemical durability, and mechanical strength as described above.
  • FIG. 1 is a cross-sectional view schematically showing a liquid crystal panel 1 including an alkali-free glass that is suitably used for the fluorescent material of the present invention.
  • a liquid crystal panel 1 taken out from the liquid crystal television of the example shown in FIG. 1 includes, for example, two glass substrates (a color filter side glass substrate 2a and a TFT side glass) having a thickness of about 0.4 to 1.1 mm arranged to face each other.
  • a substrate 2b are provided with a sealing resin body (seal material) 3 along the peripheral edge on the side (inner surface side) arranged opposite to each other and bonded together.
  • liquid crystal is sealed in a region sealed by the glass substrates 2a and 2b and the sealing resin body 3, and a liquid crystal layer 4 having a thickness of about 4 to 6 ⁇ m is formed.
  • a polarizing plate 5 having a thickness of about 0.2 to 0.4 mm is attached to the opposite side (outer surface side) of each glass substrate 2a, 2b with an adhesive.
  • the fluorescent material of the present invention uses alkali-free glass obtained by separating from such a liquid crystal panel.
  • the alkali-free glass used in the present invention is SiO 2 : 50 wt% or more, Al 2 O 3 : 10 to 20 wt%, B 2 O 3 : 5 to 20 wt%, MgO + CaO + ZnO + SrO + BaO: 5 to 20 wt%
  • a composition is preferred. This is a composition originally intended to satisfy the optical properties, thermal properties, and electrical properties of a liquid crystal panel glass, but in the fluorescent material of the present invention, the reaction with rare earth atoms is promoted and strong light emission is achieved. There is an effect that strength can be obtained.
  • the alkali-free glass suitably used in the present invention has a composition of SiO 2 : 50 wt% or more, Al 2 O 3 : 10 to 20 wt%, B 2 O 3 : 5 to 20 wt%, MgO + CaO + ZnO + SrO + BaO: 5 to 20 wt% Since it is originally a glass for liquid crystal panels, it transmits light in a wide range of wavelengths. Moreover, it has the property that it is excellent in thermal stability, chemical durability, and mechanical strength so that it can apply to a liquid crystal panel manufacturing process.
  • the rare earth atom according to the fluorescent material of the present invention is selected from Eu (europium), Tb (terbium), Ce (cerium), Sm (samarium), Tm (thulium), Pr (praseodymium), and Er (erbium).
  • Eu, Tb, and Ce emit strong light when ultraviolet light is used as excitation light.
  • Eu becomes Eu 3+ (trivalent europium) ion in the glass and generates red fluorescence.
  • Tb becomes Tb 3+ (trivalent terbium) ion in the glass and generates green fluorescence.
  • Ce becomes Ce 3+ (trivalent cerium) ion in the glass and generates blue fluorescence. From these, by selecting one or more atoms as a raw material and using it as a fluorescent material, it is possible to obtain fluorescence having a wavelength of any visible region with high performance.
  • the present invention also provides a method for producing a fluorescent material using non-alkali glass.
  • a fluorescent material consisting only of the alkali-free glass and rare earth atoms described above can be suitably produced.
  • the method for producing a fluorescent material using an alkali-free glass according to the present invention basically comprises mixing alkali-free glass (preferably glass obtained by pulverizing liquid crystal panel glass) and a compound containing a rare earth atom and pulverizing them. It is characterized by doing.
  • this method it is possible to manufacture a fluorescent material using alkali-free glass as a raw material without performing a melting treatment at a high temperature.
  • the alkali-free glass used for the liquid crystal panel etc. which became unnecessary can be effectively utilized as a resource in a low environmental load process.
  • the raw glass is not melted at a high temperature, the energy consumption is small, and the equipment cost and energy cost are low. Therefore, it is possible to manufacture an inexpensive and high-performance fluorescent material.
  • Alkali-free glass has conventionally been processed at a high processing temperature and consumes a great deal of energy when remelted, so that it has hardly been recycled in terms of environmental burden and energy cost. According to the present invention, there is an effect that it is possible to effectively use as a resource non-alkali glass that has not been recycled in the past and is no longer required and is expected to increase rapidly in the future.
  • the method for producing a fluorescent material of the present invention it is preferable that 95 to 99.99% by weight of alkali-free glass and 0.01 to 5% by weight of a compound containing rare earth atoms are mixed and pulverized. This makes it possible to obtain a high-performance fluorescent material by dissolving rare earth atoms in a high concentration in the alkali-free glass that is the base material. In addition, since alkali-free glass is used in an amount of 95 to 99.99% by weight as a raw material, effective use of resources becomes possible.
  • the method for producing a fluorescent material of the present invention includes a step of mechanically milling an alkali-free glass and a compound containing rare earth atoms.
  • a step of mechanically milling an alkali-free glass and a compound containing rare earth atoms By including such a step, it becomes possible to dissolve the rare earth atoms serving as the emission center in the glass without melting at a high temperature.
  • alkali-free glass which has a very high processing temperature and has to be melted with special equipment, as a base material of a fluorescent material with simple equipment.
  • the base material can be obtained in a glass state with a wide range of compositions, so that a fluorescent material that is superior in terms of thermal stability, chemical stability, mechanical strength, and optical stability should be manufactured. Can do.
  • the method for producing a fluorescent material of the present invention uses alkali-free glass as a raw material for the fluorescent material.
  • alkali-free glass for example, an alkali-free glass recovered from a liquid crystal panel may be used.
  • a method for recovering the alkali-free glass from the liquid crystal glass and obtaining the raw material will be described in detail.
  • the method for obtaining the alkali-free glass is not limited to the following examples.
  • the alkali-free glass is separated by the following procedure.
  • the polarizing plate 5 is removed from the liquid crystal panel 1 having a structure as shown in FIG. 1, for example, taken out from a display device having a liquid crystal panel such as a liquid crystal television.
  • the removal of the polarizing plate 5 utilizes a known mechanical method.
  • the bonded glass substrates 2a and 2b are separated into two. Specifically, the four sides inside the sealing resin body 3 in the glass substrate are cut into a rectangular shape along the sealing resin body 3 using a cutting tool such as a diamond saw or a glass cutter. Thereafter, by applying an external force as necessary, the glass substrate having a size slightly smaller than the original size is cut and removed from the liquid crystal panel.
  • the sealed liquid crystal layer 4 is opened, and the liquid crystal is exposed in a state of being attached to the glass substrate.
  • the liquid crystal is removed by scraping off the exposed glass substrate using a resin squeegee.
  • the alkali-free glass collected from a liquid crystal panel or the like usually has impurities such as an organic thin film used for a color filter, a metal thin film used for a TFT (Thin Film Transistor), and an inorganic thin film.
  • impurities can be removed by appropriately combining conventionally known mechanical methods such as sand blasting and rotational polishing, and conventionally known chemical methods such as etching with an acidic solution and an organic solvent.
  • etching with an acidic solution and an organic solvent.
  • alkali-free glass used as a raw material is roughly crushed.
  • the crushing size is preferably 50 mm or less.
  • crushing can be performed using a conventionally known shearing type crusher, hammer mill, cutter mill or the like.
  • a non-alkali glass having a liquid crystal panel screen size recovered from the above-mentioned liquid crystal panel is treated with a hammer mill or the like and roughly crushed to a size of 50 mm or less is used as the non-alkali glass raw material.
  • the compound containing a rare earth atom a compound containing Eu, Tb, Ce, Sm, Tm, Pr, Er or the like is preferably used. Further, as the compound containing a rare earth atom, an oxide, chloride, hydroxide, nitride, sulfide, or the like of the rare earth atom is preferably used.
  • Eu 2 O 3 (europium (III) oxide), EuCl 3 (europium chloride), Tb 4 O 7 (terbium (III) oxide), Ce 2 O 3 (cerium (III) oxide), CeCl 3 (cerium chloride) ), SmCl 3 (samarium chloride), Tm 2 O 3 (thulium oxide), Pr 6 O 11 (praseodymium oxide), Er 2 O 3 (erbium oxide), or the like.
  • Eu, Tb, and Ce are excited by ultraviolet rays, Tb 3+ emits green light, Eu 3+ emits red light, and Ce 3+ emits blue light.
  • the alkali-free glass described above and a compound containing rare earth atoms are mixed and pulverized.
  • the mixture of the alkali-free glass and the compound containing rare earth atoms receives mechanical pressure, that is, mechanical energy, by mechanical milling.
  • mechanical energy is converted into the formation energy of a solid solution of rare earth atoms in an alkali-free glass.
  • a powdery fluorescent material can be obtained directly from the above-mentioned raw materials.
  • an expensive composition device is not required, and the desired composition can be obtained in a short time. It is possible to directly obtain a powdery fluorescent material composed of the above raw material compounds.
  • the fluorescent material is synthesized and produced using mechanical energy by mechanical milling, it becomes a glass state with a wide range of compositions. Therefore, it is possible to produce a fluorescent material having a high ultraviolet transmittance and excellent thermal stability, chemical stability, mechanical strength, and optical stability.
  • any commonly used mechanical milling device such as a planetary ball mill, a vibration mill, or a drop ball mill can be used.
  • the mill is performed at a rotational speed of 200 to 600 rpm.
  • pots and balls pots such as zirconia, agate, and stainless steel can be used.
  • a ball having a diameter of 2 to 10 mm can also be used.
  • the treatment time is about 1 to 50 hours depending on the reactivity of each powder.
  • the obtained powder has a particle size of several tens of nm to several ⁇ m depending on conditions.
  • Such powders can be used as phosphors for lighting LEDs, phosphors for various display elements, and the like by compounding and molding with various resins. Further, since the obtained powder is glass, it is softened by heating, so that it can be directly molded.
  • Example 1 Fluorescence consisting of alkali-free glass and rare earth atoms by mechanically milling 0.9723g of alkali-free glass and 0.0287g of europium oxide using a planetary ball mill for 15 hours, 25 hours, and 35 hours, respectively. The material was manufactured. The milling conditions at this time are as follows.
  • FIG. 2 is a graph showing an example of a fluorescence spectrum when the fluorescent material obtained in Example 1 is excited by irradiation with ultraviolet light having a wavelength of 250 nm.
  • the vertical axis represents PL (Photo Luminescence) intensity (au), and the horizontal axis represents wavelength (nm).
  • a indicates a case where mechanical milling is performed for 15 hours
  • b indicates a case where mechanical milling is performed for 25 hours
  • c indicates a case where mechanical milling is performed for 35 hours. From the results shown in FIG. 2, it can be seen that, in Example 1, a powder exhibiting very strong fluorescence was obtained in the vicinity of 610 nm in any of the mechanical milling treatments of 15 hours, 25 hours, and 35 hours.
  • the fluorescence spectrum shown in FIG. 2 was measured using a spectrofluorometer (FP-6500, manufactured by JASCO Corporation) under the following conditions.
  • Excitation side bandwidth 3 nm ⁇ Fluorescence side bandwidth: 3nm ⁇ Response: 1 sec ⁇ Sensitivity: Medium ⁇ Data capture interval: 1 nm Scanning speed: 100 nm / min ⁇ Example 2> 0.9705 g of alkali-free glass and 0.0298 g of terbium oxide (Tb 4 O 7 ), or 0.9705 g of silica (SiO 2 ) and 0.0298 g of terbium oxide (Tb 4 O 7 ) under the same conditions as in Example 1.
  • a fluorescent powder was obtained by mechanical milling for 15 hours, and a fluorescence spectrum was measured under the same conditions as in Example 1.
  • FIG. 3 is a graph showing an example of a fluorescence spectrum when the fluorescent material obtained in Example 2 is excited by irradiation with ultraviolet light having a wavelength of 250 nm, and the vertical axis indicates PL (Photo Luminescence) intensity (au). .), The horizontal axis represents the wavelength (nm). From the results shown in FIG. 3, it can be seen that a powder having very strong fluorescence was obtained in the vicinity of 540 nm.
  • Example 3 0.961 g of alkali-free glass and 0.039 g of CeCl 3 were mechanically milled for 15 hours under the same conditions as in Example 1 to obtain a fluorescent powder, and the fluorescence spectrum was measured under the same conditions as in Example 1.
  • FIG. 4 is a graph showing an example of a fluorescence spectrum when the fluorescent material obtained in Example 3 is excited by irradiation with ultraviolet light having a wavelength of 250 nm, and the vertical axis indicates PL (Photo Luminescence) intensity (au). .), The horizontal axis represents the wavelength (nm). From the results shown in FIG. 4, it can be seen that a powder showing very strong fluorescence around 370 nm was obtained.
  • the amount of alkali-free glass collected from a liquid crystal panel that has become unnecessary can be reduced to the landfill, and resources can be used effectively. Furthermore, the fluorescent material which can manufacture the cheap fluorescent material which has the light emission characteristic which can be used for PDP, LED, etc. and the manufacturing method of a fluorescent material can be provided.
  • 1 liquid crystal panel 2a glass substrate (color filter side glass substrate), 2b glass substrate (TFT side glass substrate), 3 sealing resin body, 4 liquid crystal layer, 5 polarizing plate.

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PCT/JP2011/050030 2010-01-07 2011-01-05 蛍光材料および蛍光材料の製造方法 Ceased WO2011083791A1 (ja)

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JP2003107197A (ja) * 2001-09-27 2003-04-09 Fuji Photo Film Co Ltd 放射線像変換パネルおよびその製造方法
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