WO2003106588A1 - 球形蓄光性蛍光体粉末及びその製造方法 - Google Patents
球形蓄光性蛍光体粉末及びその製造方法 Download PDFInfo
- Publication number
- WO2003106588A1 WO2003106588A1 PCT/JP2003/007461 JP0307461W WO03106588A1 WO 2003106588 A1 WO2003106588 A1 WO 2003106588A1 JP 0307461 W JP0307461 W JP 0307461W WO 03106588 A1 WO03106588 A1 WO 03106588A1
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- WO
- WIPO (PCT)
- Prior art keywords
- powder
- spherical
- phosphorescent phosphor
- phosphor powder
- phosphorescent
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Classifications
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- 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
- C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
- C09K11/7792—Aluminates
Definitions
- the present invention relates to a spherical phosphorescent phosphor powder and a method for producing the same.
- a luminous phosphor is a material that can store light energy when illuminated with sunlight or light from another light source, emit light for a long time in a place, and can be used for various purposes.
- Most of conventional phosphorescent phosphors are made of sulfur compounds, for example, ZnS: Cu ⁇ Co or CaS: Co. These phosphorescent phosphor powders store light and emit light.
- the emission time is about 1 to 2 hours at most, and the chemical stability is poor, the durability is poor, and it is easy to deteriorate. It had the drawback of drastically lowering the service life.
- Sulfur compound phosphorescent phosphor powders containing a radioactive substance added to a radioactive substance can emit light for a long period of time, but the use of radioactive substances is not possible due to radiation damage to the human body and environmental pollution. The use is also prohibited.
- phosphorescent phosphor powders containing an alkaline earth metal aluminate as a main component were proposed.
- Luminescent phosphors that use Eu as an alkaline earth metal and thus activate aluminate have a high emission intensity, a long emission time of 24 hours or more, are chemically stable, and have excellent durability. It has advantages such as long service life and is widely used. For example, it has been applied to fluorescent inks, fluorescent paints, fluorescent plastics, fluorescent glasses, fluorescent cloths, decorative products and low-intensity light sources.
- Phosphorescent phosphor powder of aluminates of the alkali earth metal - A l 2 0. And several kinds of necessary starting compounds, and react at a high temperature of more than 130 ° C. It is a very hard solid powder in the form of ceramic.
- One A 1 2 0 3 is chemically very stable, does not react with sufficiently high if the temperature alkaline earth metal, generates aluminate first monoclinic reaction of Atsushi Ko, Eu 2 0 run evening consisting noisy de metal element activator such as 3 is introduced into the crystal, that to form a luminescent center and lattice defects.
- This high-hardness product cannot be turned into a powder of several tens of kilometres without strong grinding.
- the activation energy is absorbed by the crystal defects generated during grinding, and the luminescence is reduced.
- the particle size is less than 10 mm, the intensity of light emission sharply decreases, and when the particle size is 3 or less, the light emission becomes weak, making it difficult to put into practical use.
- phosphorescent phosphor powder for applications such as fluorescent ink for offset printing, fluorescent toner for electronic copiers, and dyes for textile dyeing, extremely fine powder is required. With a phosphorescent phosphor powder made of aluminate, it was impossible to obtain a fine powder having a sufficient emission intensity.
- +2 and +3 ions act as activators for the fluorescent substance in the aluminate phosphor, they emit light with completely different spectra. In alkaline earth metal aluminates, only divalent ions can form lattice defects.
- this solid-phase reaction must be performed in a reducing atmosphere, and the reduction yield of + trivalent Eu to + divalent Eu determines the quality of the phosphorescent phosphor.
- the reaction is performed in a nitrogen gas stream containing about 5% of hydrogen gas to reduce Eu ions, but the reaction must be performed in a sealed container, which makes the operation complicated and reduces production costs. However, mass production was difficult.
- Japanese Patent Application No. 10-185688 Japanese Patent Application No. 2000-1672
- Japanese Patent Application No. 2000-1672 Japanese Patent Application No. 2000-1672
- a phosphorescent phosphor composed of an alkaline earth metal aluminate containing Eu as a main activator.
- the phosphorescent phosphor fine powder is used for a fluorescent ink, a fluorescent paint, a fluorescent plastic, a fluorescent glass, a fluorescent cloth, or the like as described above, a fine powder having a certain particle size is required. In order to obtain a fine powder having a narrow particle size, spherical particles are preferable.
- the solid phosphorescent substance is obtained by crushing the solid luminous phosphor by the conventional method as described above, spherical particles are hardly obtained, and it is impossible to perform sharp classification with a narrow particle size distribution.
- the present invention provides a phosphorescent phosphor powder having a high luminous intensity, a long luminous time, excellent durability, extremely small particles, and which does not impair workability even when added to a synthetic resin or the like. That is one purpose.
- Still another object of the present invention is to provide a method for producing fine-grained luminous phosphor powder of excellent quality by an extremely simple method. Disclosure of the invention
- a spherical phosphorescent phosphor powder obtained by heating a phosphorescent phosphor powder or a phosphorescent phosphor raw material to a high temperature has a phosphorescent phosphorescent powder.
- powders obtained by crushing solids of light bodies they have higher luminous intensity, longer luminous time, excellent durability, and even when added to synthetic resins, etc., do not impair their workability at all. And found that the present invention was completed.
- the present invention relates to a phosphorescent phosphor powder containing an alkaline earth metal aluminate as a main component and a transition metal element such as a lanthanide metal element as an activator, wherein the powder is a spherical powder.
- the gist of the present invention is a spherical phosphorescent phosphor powder.
- a phosphorescent phosphor powder synthesized in advance or a phosphorescent phosphor precursor powder obtained by preliminarily reacting a raw material for synthesizing a phosphorescent phosphor is used as a raw material, and the raw material is used as a melting point of the phosphorescent phosphor.
- the gist of the present invention is a method for producing a spherical phosphorescent phosphor powder that is made spherical by passing through a heated region.
- FIG. 1 is a schematic view of an example of the apparatus for producing a spherical phosphorescent phosphor powder of the present invention.
- FIG. 2 is a photograph of a phosphorescent phosphor powder (a) obtained by a conventional production method and a spherical phosphorescent phosphor powder (b) obtained as an example of the present invention taken by a scanning electron microscope. It is a photograph taken.
- the phosphorescent phosphor to be used a fine powder obtained by crushing a solid matter of any known phosphorescent phosphor can be used, and an alkaline earth metal aluminate ′ is used as a main component.
- Any known phosphorescent phosphor in which a transition metal element such as various lanthanoid metal elements is introduced as an activator for generating a trap of electron orbits for phosphorescence and light emission can be used.
- the particle size of the spherical phosphorescent fine powder of the present invention is preferably 1 to 100 z, more preferably 1 to 3 /. If the particle size is 1 or less, it is difficult to exhibit sufficient light storage and light emission performance. If the particle size is more than 100 ⁇ , the particle size is too large, Is limited. For use in applications such as fluorescent ink for offset printing, fluorescent toner for electronic copying machines, and dyes for textile dyeing, those having a particle size of 3 / or less are preferred.
- the luminescent performance of the phosphorescent phosphor is improved, and when the phosphor is added to a synthetic resin, printing ink, or the like. Its workability and workability can be improved.
- a phosphorescent phosphor fine powder obtained by crushing a material synthesized in advance as a phosphorescent phosphor solid material is used as a raw material. It can also be obtained by mixing the raw materials necessary for synthesizing the phosphorescent phosphor and pre-reacting it. It has no phosphorescence yet, and is heated and fired to produce the phosphorescent precursor.
- Raw materials can be used as raw materials.
- these raw materials are melted into spherical fine powder by passing them through a region heated to a temperature higher than the melting point of the solid.
- the region heated above the melting point can be obtained by generating a thermal plasma region by a known method such as a non-transfer type and a transfer type DC plasma jet, high-frequency heating plasma, arc heating, and combustion gas burner.
- the heating atmosphere it is necessary to adjust the heating atmosphere to a reducing atmosphere, an oxidizing atmosphere, or an inert gas atmosphere, and accordingly, it is necessary to select a heating method and a heating gas above the melting point of the solid. is there.
- a method of heating in an air plasma frame may be employed.
- a mixed gas of hydrogen or an inert gas such as argon and hydrogen is used.
- a method of using as a plasma gas, or a method of blowing a raw material for producing a phosphorescent phosphor together with a carrier gas containing a reducing gas such as hydrogen into a plasma frame of an inert gas such as argon can be adopted.
- the method of feeding the raw material powder into the region heated above the melting point of the solid is to flow the raw material into the carrier gas as described above, and blow the plasma flame into this to mix the two. It is also possible to use a deviation from a known plasma heating method for a powder, such as a method of generating a transfer-type plasma by mixing a raw material powder into a plasma carrier gas.
- the phosphorescent phosphor of the spherical particulate phosphorescent phosphor powder of the present invention all known phosphorescent phosphors can be used. Among them, the alkaline earth of the following general formula containing Eu as a main activator is particularly preferred. A phosphorescent phosphor made of a class of metal aluminates is preferably used.
- A is one or more elements selected from the group consisting of alkaline earth metals Mg, Ca, SrBa and divalent metal Zn
- D is activator Eu And E consist of Dy, Nd, Ho, Er, Tm, Yb, Lu of lanthanoids as co-activators and Mn, Zr, Nb, Ti, Sb, Li, Ge, In, W of transition metals.
- G is A1 of the host crystal
- H is
- raw materials, the A1C1 3 ⁇ 6H 2 0 and departure material of A1 component, SrCl 2 ⁇ a 6H 2 0 was used as a starting material of Sr component, using TiCl 3 as Ti ingredient starting material, Eu 2 0 3, Dy 2 0 3, H 3 B0 3 it it Eu, Dy,
- component B It can be used as a starting material for component B.
- the molar ratio of SrCl 2 and A1C1 3 of starting material 1 1. 5 ⁇ l: 5 , Eu 2 ⁇
- S r C 1 2 is a Eu 2 0 3 molar ratio of 1: 0. 001 ⁇ ; L: 0. 02, 3. 1 2 and! 1; 1_Rei_1 3 molar ratio of 1: 0.0001 to 1:
- the precursor material raw materials for example, the EU 2 0 3, Dy 2 0 3 of the starting material and the solution A was dissolved in water, H 3 B0 3, A1C1 3 ⁇ 6H 2 O s Sr Cl the 2 ⁇ 6H 2 ⁇ and TiC 1 3 and solution B was dissolved in water, a mixture of solutions a and B, then poured the reaction in pure water at 80, the resulting precipitate filtered, was synthesized by drying These can be used as precursor raw materials.
- the stirring speed is adjusted. And the supply speed may be adjusted. For example, if the mixed solution is supplied while stirring the pure water at a high speed, a spherical particle phosphorescent phosphor powder having a small particle diameter can be obtained. If the mixture is supplied while stirring at a low speed, a spherical particle phosphorescent particle having a large particle diameter can be obtained. Phosphor powder can be obtained.
- FIG. 1 shows an example of a production apparatus for producing the spherical particulate phosphorescent phosphor powder of the present invention, and a production method using such a production apparatus will be described.
- a direct-current argon plasma flame is used as a means for generating a heating region for producing the phosphorescent phosphor fine powder.
- 1 is a DC power supply
- 2 is a plasma frame
- 3 is a carrier gas
- 4 is a raw material inlet
- 5 is a bench lily-shaped mixer
- 6 is a plasma heating reactor
- 7 is a classifier / collector
- 8 is
- the electrostatic precipitator 9 is a spherical phosphorescent phosphor powder.
- the precursor material is fed into a nozzle of a Penturi type mixer 5 together with a carrier gas composed of a mixed gas of argon and hydrogen, and mixed with a plasma frame 2 composed of argon gas.
- the precursor raw material is heated and reacted in a reducing atmosphere containing hydrogen in the high-temperature plasma frame 2 to synthesize a luminous phosphor in the form of a fine powder, and at the same time, is melted by high-temperature heating to obtain a surface tension. To form a spherical fine powder.
- the gas containing the fine powder leaving the plasma heating reactor 6 is guided to the classifier / collector 7, Classify into three particle sizes and collect. Further, the gas containing the fine powder having the minimum particle diameter is led to the electrostatic precipitator 8, and the remaining fine powder is collected.
- the resulting spherical phosphorescent phosphor powder 9 was a fine powder having a uniform particle size and a narrow particle size distribution width, with each particle having a spherical shape.
- Example 2 The phosphorescent phosphor fine powder, which was synthesized in advance as a phosphorescent phosphor solid and crushed, was used as a raw material.
- a phosphorescent phosphor fine powder which was synthesized in advance as a phosphorescent phosphor solid and crushed, was used as a raw material.
- FIG. 2 is a photograph taken with a scanning electron microscope of the spherical phosphorescent phosphor powder according to Example 2 and the phosphorescent phosphor powder manufactured by a conventional manufacturing method as a comparative example. .
- the spherical phosphorescent phosphor powder (FIG. 2 (b)) according to the present invention is completely different from the conventional powder (FIG. 2 (a)), and has a very spherical fine powder. Is recognized. Since the spherical phosphorescent phosphor powder of the present invention is a fine powder in which each particle has a spherical shape and a uniform particle size, when it is used as a phosphorescent phosphor colorant of a synthetic resin, it is extremely workable and workable. It will be excellent in property.
- the production process is short, continuous production is possible, and requires pulverization after firing.
- a phosphorescent phosphor fine powder in the form of a solid can be obtained.
- the phosphorescent phosphor powder obtained according to the present invention has a high luminous intensity, a long luminous time, and excellent durability. Further, since the phosphorescent phosphor powder is a spherical fine powder having extremely small particles, it can be used as a fluorescent ink for printing such as offset printing and ink jet printing, a fluorescent toner for electronic copying machines, a fluorescent dye for textile dyeing, and a synthetic resin. It can be suitably used for applications such as fluorescent coloring agents such as pellets, synthetic resin films, and paints.
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- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
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- Luminescent Compositions (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/517,589 US20060001007A1 (en) | 2002-06-13 | 2003-06-12 | Spherical light storing phosphor powder and process for producing the same |
JP2004513403A JPWO2003106588A1 (ja) | 2002-06-13 | 2003-06-12 | 球形蓄光性蛍光体粉末及びその製造方法 |
AU2003242303A AU2003242303A1 (en) | 2002-06-13 | 2003-06-12 | Spherical light storing phosphor powder and process for producing the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002210287 | 2002-06-13 | ||
JP2002-210287 | 2002-06-13 |
Publications (1)
Publication Number | Publication Date |
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WO2003106588A1 true WO2003106588A1 (ja) | 2003-12-24 |
Family
ID=29728550
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/007461 WO2003106588A1 (ja) | 2002-06-13 | 2003-06-12 | 球形蓄光性蛍光体粉末及びその製造方法 |
Country Status (4)
Country | Link |
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US (1) | US20060001007A1 (ja) |
JP (1) | JPWO2003106588A1 (ja) |
AU (1) | AU2003242303A1 (ja) |
WO (1) | WO2003106588A1 (ja) |
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CN102433116A (zh) * | 2011-12-12 | 2012-05-02 | 苏州大学 | 一种钙锆硼铝酸盐蓝色荧光粉及其制备方法 |
US8186021B2 (en) | 2006-01-10 | 2012-05-29 | Csc Group Llc | Conspicuity devices and methods |
CN102500550A (zh) * | 2011-11-30 | 2012-06-20 | 晶科电子(广州)有限公司 | 一种荧光粉筛选分级装置及其分级系统和分级方法 |
JP5362133B1 (ja) * | 2013-02-12 | 2013-12-11 | 株式会社金星 | 球形状蓄光材の製造方法及びプラズマトーチ |
US9080764B2 (en) | 2006-01-10 | 2015-07-14 | Csc Group Llc | Conspicuity devices and methods |
US9775391B1 (en) | 2006-01-10 | 2017-10-03 | Csc Group Llc | Conspicuity devices and methods |
US10149508B2 (en) | 2006-01-10 | 2018-12-11 | Csc Group Llc | Conspicuity devices and methods |
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USD873163S1 (en) | 2017-09-13 | 2020-01-21 | Csc Group Llc | Conspicuity tag |
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EP0985007B2 (en) * | 1997-02-24 | 2010-11-03 | Cabot Corporation | Oxygen-containing phosphor powders, methods for making phosphor powders and devices incorporating same |
US20090252927A1 (en) * | 2006-01-10 | 2009-10-08 | Joseph Gonzalez | Multi-purpose wedge for emergency workers |
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US9081315B2 (en) * | 2012-04-18 | 2015-07-14 | Troy Group, Inc. | Phosphorescent toner and methods of forming and using the same |
US10106730B2 (en) * | 2012-12-10 | 2018-10-23 | Powdermet, Inc. | Structural expandable materials |
US9334430B1 (en) * | 2015-05-29 | 2016-05-10 | Sirrus, Inc. | Encapsulated polymerization initiators, polymerization systems and methods using the same |
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US11852526B2 (en) * | 2020-12-08 | 2023-12-26 | Xerox Corporation | Printed sun exposure sensor with fluorescent toner for disposable/single use |
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EP0221562A2 (en) * | 1985-11-07 | 1987-05-13 | Kasei Optonix, Ltd. | Process for preparing a phosphor |
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JP2001107044A (ja) * | 1999-10-12 | 2001-04-17 | Shoei Kk | 蛍光体およびその製造方法 |
JP2002327173A (ja) * | 2001-04-27 | 2002-11-15 | Fujioka Naozumi | 微粒子状蓄光性蛍光粉の製造方法及び微粒子状蓄光性蛍光粉。 |
JP2003313548A (ja) * | 2002-04-18 | 2003-11-06 | Alpha System:Kk | 微粒子状蓄光性蛍光粉の製造方法及び微粒子状蓄光性蛍光粉 |
-
2003
- 2003-06-12 US US10/517,589 patent/US20060001007A1/en not_active Abandoned
- 2003-06-12 WO PCT/JP2003/007461 patent/WO2003106588A1/ja active Application Filing
- 2003-06-12 JP JP2004513403A patent/JPWO2003106588A1/ja active Pending
- 2003-06-12 AU AU2003242303A patent/AU2003242303A1/en not_active Abandoned
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EP0221562A2 (en) * | 1985-11-07 | 1987-05-13 | Kasei Optonix, Ltd. | Process for preparing a phosphor |
JPH01108294A (ja) * | 1987-10-19 | 1989-04-25 | Nichia Chem Ind Ltd | 螢光体の製造方法 |
JPH07292354A (ja) * | 1994-04-28 | 1995-11-07 | Futaba Corp | 蛍光体及びその製造方法 |
JPH09286983A (ja) * | 1996-04-22 | 1997-11-04 | Matsushita Electron Corp | 蛍光体 |
JPH09291275A (ja) * | 1996-04-26 | 1997-11-11 | Matsushita Electron Corp | 蛍光体の製造方法及び蛍光体 |
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US8186021B2 (en) | 2006-01-10 | 2012-05-29 | Csc Group Llc | Conspicuity devices and methods |
US11937657B2 (en) | 2006-01-10 | 2024-03-26 | Csc Group Llc | Conspicuity devices |
US9080764B2 (en) | 2006-01-10 | 2015-07-14 | Csc Group Llc | Conspicuity devices and methods |
US9775391B1 (en) | 2006-01-10 | 2017-10-03 | Csc Group Llc | Conspicuity devices and methods |
US10149508B2 (en) | 2006-01-10 | 2018-12-11 | Csc Group Llc | Conspicuity devices and methods |
CN102500550A (zh) * | 2011-11-30 | 2012-06-20 | 晶科电子(广州)有限公司 | 一种荧光粉筛选分级装置及其分级系统和分级方法 |
CN102433116A (zh) * | 2011-12-12 | 2012-05-02 | 苏州大学 | 一种钙锆硼铝酸盐蓝色荧光粉及其制备方法 |
CN102433116B (zh) * | 2011-12-12 | 2014-02-26 | 苏州大学 | 一种钙锆硼铝酸盐蓝色荧光粉及其制备方法 |
JP5362133B1 (ja) * | 2013-02-12 | 2013-12-11 | 株式会社金星 | 球形状蓄光材の製造方法及びプラズマトーチ |
JP2014152282A (ja) * | 2013-02-12 | 2014-08-25 | Kinboshi Inc | 球形状蓄光材の製造方法及びプラズマトーチ |
USD873163S1 (en) | 2017-09-13 | 2020-01-21 | Csc Group Llc | Conspicuity tag |
USD860847S1 (en) | 2018-04-23 | 2019-09-24 | Csc Group Llc | Conspicuity device |
Also Published As
Publication number | Publication date |
---|---|
AU2003242303A8 (en) | 2003-12-31 |
US20060001007A1 (en) | 2006-01-05 |
JPWO2003106588A1 (ja) | 2005-10-13 |
AU2003242303A1 (en) | 2003-12-31 |
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