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Long-persistence phosphor with ultra-fine grain diameter and high light effect, and method of producing the same

A technology of long afterglow phosphors and ultra-fine particles, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of making breakthroughs in ultra-fine and high-brightness phosphors, to ensure afterglow time, loose powder blocks, improve The effect of crystallinity

Active Publication Date: 2011-11-16
JIANGSU BREE OPTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composition design of the existing disclosed phosphors is only considered from the perspective of the general application particle size. Breakthrough in powder

Method used

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  • Long-persistence phosphor with ultra-fine grain diameter and high light effect, and method of producing the same
  • Long-persistence phosphor with ultra-fine grain diameter and high light effect, and method of producing the same
  • Long-persistence phosphor with ultra-fine grain diameter and high light effect, and method of producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The chemical composition formula of the target product: Sr 0.93 Mg 0.12 Al 2 o 4.112 :Eu 0.022 , Dy 0.035 , Gd 0.005 As a basis for measurement, take the corresponding weight of SrCO 3 27.34g, Al 2 o 3 20.2g, MgO 0.96g, Eu 2 o 3 0.77g, Dy 2 o 3 1.31g, Gd 2 o 3 0.18g, H 3 BO 3 1.27g, Ba f 2 1.78g. After mixing, put it in a high-temperature reducing atmosphere furnace, under N 2 / H 2 Under the protection of mixed gas, the temperature was raised to 1330°C at a heating rate of 350°C / h, and then kept for 3 hours, then cooled to room temperature at a cooling rate of 120°C / h, and then released from the furnace. After pulverizing the burned phosphor powder, enter the jet mill and classifier for pulverization to obtain ultra-fine long-lasting phosphor. The central particle size d50 of the powder is 3-8 μm, d10 ≥ 1 μm, and d90 ≤ 12 μm.

[0039] Take the crushed long-lasting phosphor powder and add it to the prepared aluminum nitrate solution with a mass perc...

Embodiment 2

[0041] The chemical composition formula of the target product: Sr 0.94 Mg 0.21 Al 2 o 4.192 :Eu 0.012 , Dy 0.025 , La 0.0046 As a basis for measurement, take the corresponding weight of SrCO 3 27.64g, Al 2 o 3 20.2g, MgO 1.68g, Eu 2 o 3 0.42g, Dy 2 o 3 0.93g, La 2 o 3 0.15g, H 3 BO 3 0.51g, NH 4 F 0.18g. After mixing, put it in a high-temperature reducing atmosphere furnace, under N 2 / H 2 Under the protection of mixed gas, the temperature was raised to 1380°C at a heating rate of 415°C / h, and then kept for 5 hours, then cooled to room temperature at a cooling rate of 110°C / h, and then released from the furnace. After pulverizing the burned phosphor powder, enter the jet mill and classifier for pulverization to obtain ultra-fine long-lasting phosphor. The central particle size d50 of the powder is 3-8 μm, d10 ≥ 1 μm, and d90 ≤ 12 μm.

[0042] Take the crushed long afterglow phosphor powder and add it into the prepared post-treatment solution with a mass per...

Embodiment 3

[0044] The chemical composition formula of the target product: Sr 1.2 Mg 0.08 Al 2 o 4.334 :Eu 0.016 , Dy 0.028 , La 0.01 As a basis for measurement, take the corresponding weight of SrCO 3 33.92g, MgO 0.62g, Al 2 o 3 19.42g, Eu 2 o 3 0.54g, Dy 2 o 3 1.00g, La 2 o 3 0.31g, H 3 BO 3 0.84g, NH 4 F 0.25g. After mixing, put it in a high-temperature reducing atmosphere furnace, under N 2 / H 2 Under the protection of mixed gas, the temperature was raised to 1450°C at a heating rate of 375°C / h, and then kept for 4.5 hours, then cooled to room temperature at a cooling rate of 110°C / h, and then released from the furnace. After pulverizing the burned phosphor powder, enter the jet mill and classifier for pulverization to obtain ultra-fine long-lasting phosphor. The central particle size d50 of the powder is 3-8 μm, d10 ≥ 1 μm, and d90 ≤ 12 μm.

[0045] Take the pulverized long-lasting phosphor powder and add it to the prepared post-treatment solution with a mass perc...

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Abstract

The present invention provides super fine grain size high light efficiency long lad fluorescent powder. The chemical structural formula of the fluorescent powder is Srm-pMepAl2O(3+m+q):Eux, Dyy, Rz, wherein Me is at least one of Ba and Mg; R is at least one of La and Gd; m is more than 1 and less than or equal to 0.3; p is more than or equal to 0.006 and less than 0.3; q is equal to x plus y plus z; x is more than or equal to 0.005 and less than or equal to 0.05; and z is more than or equal to 0.0001 and less than or equal to 0.01. The preparation method comprises the following steps: 1) by taking the chemical structural formula of target products as a measuring base, oxides of Sr, Ba, Mg, Eu, Dy, La and Gd and nitrate or carbonate are picked up as raw materials; 2) the raw materials are added with reaction auxiliary agent; 3) the mixed materials are placed in a high-temperature reducing atmosphere furnace, and subjected to high-temperature synthesis under the protection of N2H2 mixed gas; 4)the sintered fluorescent powder blocks are crushed to obtain super fine grain size long lad fluorescent powder; and 5) the crushed fluorescent powder is subjected to after treatment to obtain the finished product. The fluorescent powder has the advantages of super fine grain size and centralized distribution and higher brightness and longer afterglow time, and can be better applied to fields such as luminescent fiber, printing, coating material.

Description

technical field [0001] The invention relates to a fluorescent powder and a manufacturing method thereof, in particular to a fine-grained, high-light-efficiency, long-lasting fluorescent powder and a manufacturing method thereof. Background technique [0002] There have been some reports and patent introductions on long-lasting luminescent materials of alkaline earth metal aluminates activated by europium, among which strontium aluminate activated by europium has been widely used as long-lasting luminescent materials. About Europium Activated Strontium Aluminate Phosphor SrAl 2 o 4 : Eu promptly has the report in US3294699 (1966), and it discloses a kind of emission main peak at 520nm green long afterglow phosphor. Disclosed in Chinese patent CN10538007 is m (Sr 1-x Eu x )O·nAl 2 o 3 .yB 2 o 3 Long afterglow phosphor and its manufacturing method, wherein the range of each coefficient is 1≤m≤5, 1≤n≤8, 0.001≤x≤0.1, 0.005≤y≤0.35, using oxides and carbon containing alumin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80
Inventor 梁超何锦华符义兵蒋建清董岩
Owner JIANGSU BREE OPTRONICS CO LTD
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