A surface-coated long-lasting phosphor and preparation method thereof

A long-lasting phosphor and surface coating technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of easy aggregation, high oil absorption rate, poor compatibility, etc., achieve strong film binding force and reduce oil absorption rate , the effect of viscosity reduction

Active Publication Date: 2012-02-01
JIANGSU BREE OPTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved in the present invention is to provide a surface-coated long-lasting phosphor for the problems of poor compatibility, easy agglomeration, and high oil absorption rate when the strontium aluminate long-lasting phosphor is used in ink, paint or plastics. and its preparation method

Method used

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  • A surface-coated long-lasting phosphor and preparation method thereof
  • A surface-coated long-lasting phosphor and preparation method thereof
  • A surface-coated long-lasting phosphor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Select the chemical structural formula as Sr 0.95 al 2 o 4 :Eu 0.02 , Dy 0.03 The long-lasting phosphor phosphor is used as the coating object. Weigh 150g of phosphor and place it in a container with a heating jacket. While stirring, heat the phosphor to 100°C, add 0.23g of stearic acid, and continue to keep warm And after stirring for 5 minutes, take 0.3 g of isopropyl bis(glyceryl distearate) aluminate, grind it and add it to the fluorescent powder, continue stirring for 5 minutes, stop heating, and cool to room temperature to obtain the coating treatment. Phosphor.

[0036] Table 1 Performance comparison before and after phosphor coating

[0037]

[0038] Table 1 lists several important performance indicators of the surface-coated phosphor powder and the uncoated phosphor powder prepared in Example 1. It can be seen from the table that after the surface coating, the oil absorption rate of the phosphor is effectively reduced, and the activation index is signi...

Embodiment 2

[0040] Weigh the chemical structural formula as Sr 0.88 al 2 o 4 :Eu 0.035 , Dy 0.085 Place 300g of long-lasting phosphor phosphor in a container with a heating jacket, heat the phosphor to 120°C while stirring, add 1.5g of stearic acid, continue to keep warm and stir for 10min, then take 3.6g Isopropyl bis(distearyldiethylene glycol ester)aluminate was pulverized and added to the phosphor powder. After stirring for 8 minutes, the heating was stopped, and the coated phosphor powder was obtained after cooling to room temperature.

Embodiment 3

[0042] Take the chemical structural formula as Sr 3.982 al 14 o 25 :Eu 0.006 , Dy 0.012Place 200g of the long-lasting phosphor powder in a container with a heating jacket. While stirring, heat the phosphor powder to 130°C, add 2.5g of stearic acid, continue to keep warm and stir for 15 minutes, and then take 6.4g of di( Pentaerythritol tristearate (pentaerythritol)aluminate) was pulverized and added to the fluorescent powder. After stirring for 15 minutes, the heating was stopped, and the coated fluorescent powder was obtained after cooling to room temperature.

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Abstract

The invention relates to a surface-coated long-lasting phosphor and a preparation method thereof. The phosphor used as the nucleus in the phosphor is an alkaline earth aluminate phosphor, and its chemical structure is Sr(1-x-y)Al2O4: Eux, Dyy (0.001≤x≤0.05, 0.001≤y≤0.1), Sr(4 -x-y)Al14O25: Eux, Dyy (0.0005≤x≤0.04, 0.0001≤y≤0.08) or Ca(1-x-y)Al2O4: Eux, Ndy (0.001≤x≤0.06, 0.001≤y≤0.1), the shell is Organic coating. The present invention adopts the organic surface modification technology to realize the organic surface of the fluorescent powder, significantly improves the compatibility problem between the fluorescent powder and the organic medium, and improves the use characteristics of the fluorescent powder. The manufacturing method of the fluorescent powder surface coating layer provided by the invention has simple process, is controllable, and is easy to popularize and apply.

Description

technical field [0001] The invention relates to a fluorescent powder and a surface modification method thereof, in particular to a surface-coated long afterglow fluorescent powder and a preparation method thereof. Background technique [0002] With the development of science and technology, long afterglow luminescent materials have been paid more and more attention by people, and have a wide range of practical applications in the fields of aviation instruments, paint industry, enamel, textile industry and arts and crafts. It is particularly worth noting that when long afterglow is used for road lighting, architectural signs, and fire signs, it can effectively solve the weak lighting during short-term power outages caused by sudden accidents such as earthquakes and fires, provide people with escape instructions, and save people's lives. people life. [0003] Different from the early sulfide luminescent materials, the SrAl2O4:Eu2+ phosphor discovered in the 1960s has brought ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80C09K11/02
Inventor 梁超何锦华张超符义兵
Owner JIANGSU BREE OPTRONICS CO LTD
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