Process for producing fluorescent metal oxide material

A manufacturing method and oxide technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problem that metal chelates are not fully utilized

Inactive Publication Date: 2004-02-25
CHUBU KIRESUTO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has not yet developed an appropriate method that can uniformly mix the metal chelates in the solid state at the molecular level, and the advantages of using metal chelates have not been fully brought into play.

Method used

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  • Process for producing fluorescent metal oxide material
  • Process for producing fluorescent metal oxide material
  • Process for producing fluorescent metal oxide material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 166.35 g (0.57 mol) of ethylenediaminetetraacetic acid and water were added to a 2-liter beaker so that the total amount would be 700 g, and then 75 g of aqueous ammonia was added and dissolved. The solution was heated while stirring, and while stirring at a solution temperature of 60° C., 115.44 g (yttrium: 0.57×0.98 mol) of yttrium carbonate trihydrate (yttrium content: 43.0%) and europium oxide (europium content: 85.3 mol) were slowly added in sequence. %) 2.03g (europium: 0.57×0.02mol), and keep it from boiling and overflowing. Then, stirring was continued at 100° C. for 3 hours, and the pH became 5.0, and the solution was completely dissolved. Water was added thereto to make the total amount 1500 g, at this time a colorless and clear organic chelate solution with a metal molar ratio of Y:Eu=0.98:0.02 was obtained. The solution was powdered by spray drying at a drying temperature of 160°C to obtain a mixed metal complex powder (Y 2 o 3 : Eu) 137g.

[0050] figu...

Embodiment 2

[0056] After adding 21.58 g (0.074 mol) of ethylenediaminetetraacetic acid and water to a 1-liter beaker so that the total amount would be 500 g, 10 g of ammonia water was added and dissolved. The solution was heated while stirring, and while stirring at a solution temperature of 60° C., 6.44 g of barium carbonate (barium content: 69.1%) (barium: 0.033 mol), magnesium hydroxide (magnesium content: 41.1%) 2.14 g were slowly added in sequence. g (magnesium: 0.036mol) and europium oxide (europium content: 85.3%) 0.645g (europium: 0.0036mol), and keep it from boiling to overflow. Then, the stirring was continued at 80° C. for 1 hour, and then 6 g of aqueous ammonia was added to dissolve completely. Next, 137.66 g (aluminum: 0.36 mol) of ethylenediaminetetraacetic acid aluminum-ammonium salt (aluminum content: 7.1%) was added to this solution, and the pH became 6.7 and the solution was completely dissolved. Continue to add water in this solution, make total amount become 1000g, at...

Embodiment 3

[0064] 10.02 g (0.034 mol) of ethylenediaminetetraacetic acid and water were added to a 1-liter beaker so that the total amount would be 500 g, and then 5 g of ammonia water was added and dissolved. The solution was heated while stirring, and while stirring at a solution temperature of 60° C., slowly added barium carbonate (barium content: 69.1%) 6.35 g (barium: 0.032 mol) and manganese carbonate (manganese content: 43.5%) 0.213 g (manganese: 0.0017mol), and keep it from boiling and overflowing. Then, the stirring was continued at 80° C. for 1 hour, and 4 g of ammonia water was added to dissolve completely. Add aluminum-ammonium edetate (aluminum content: 7.1%) 153.43g (aluminum: 0.404mol) to this solution, then pH becomes 6.5 and dissolve completely, then continue to add water in this solution, make total amount become 1000g, At this time, a colorless and clear organic chelate solution with metal molar ratio (Ba+Mn):Al=1:12, Ba:Mn=0.95:0.05 can be obtained. The solution was...

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Abstract

A process for producing a metal oxide phosphor includes a step of firing a powder containing an organic metal chelate complex including a plurality of metals constituting the metal oxide at a uniform composition, whereby produced is a metal oxide phosphor having substantially spherical shape with substantially uniform particle size and excellent luminance properties.

Description

technical field [0001] The present invention relates to a method for producing a metal oxide phosphor having a good composition controllability, a nearly spherical shape and a nearly uniform diameter, and excellent luminance characteristics. Background technique [0002] As the method of producing metal oxide phosphors, the most commonly used method is to use solid raw materials such as carbonates or oxides of mixed metals with a given metal composition as the raw material of phosphors, and then burn them to obtain composite oxides. The so-called solid-phase method of matter. However, in this method, since the raw material powders are mixed in a solid phase state, microscopically, a heterogeneous phase is evident, and composition deviation due to generation of heterogeneous phases cannot be avoided. Moreover, the particle size of the obtained metal oxide is large and non-uniform, so in order to obtain a metal oxide with a small particle size, post-processing such as pulveri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/77C09K11/78
CPCC09K11/7787C09K11/7769C09K11/7701
Inventor 斋藤秀俊南部信义中村淳
Owner CHUBU KIRESUTO
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