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Heat-resistant waterproof high-brightness luminous powder with long persistence and preparation thereof

A long-lasting luminescent powder and high-brightness technology, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve problems such as poor brightness and afterglow brightness, heat resistance, and water resistance that cannot meet the requirements, and achieve long-lasting luminescence The effect of time, good fluidity and easy handling

Inactive Publication Date: 2006-06-14
董升
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned long-lasting luminescent powder has poor brightness and afterglow brightness, and its heat resistance and water resistance cannot meet the requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh a-Al 2 o 3 46.56g, SrCO 3 , 33.69g, MgO9.22g, H 3 BO 3 , 2.83g, (NH 4 ) 2 HPO 4 3.01g, Eu 2 o 3 1.29g, Dy 2 o 3 , 3.40g, add corundum balls of the same weight to a porcelain ball mill jar, grind and mix thoroughly for more than 10 hours, place in a corundum crucible, 2 +H 2 Under the protection of mixed gas, sinter at 1300°C for 3 hours, cool naturally, crush and sieve to obtain the luminous raw powder. Put the original powder in a stirring zirconium oxychloride solution at 60°C and mix evenly, add an appropriate amount of ammonia water dropwise and stir for 2 hours, filter, wash with water to make a 60% slurry, add triethanolamine at a concentration of 50%, and stir evenly , filtered, dried at 120°C, dispersed, and sieved to obtain heat-resistant, water-resistant, high-brightness, long-lasting luminous powder that emits yellow-green light.

Embodiment 2

[0028] Weigh a-Al 2 o 3 46.56g, SrCO 3 , 33.69g, MgO9.22g, H 2 BO 3 2.83g, (NH 4 ) 2 HPO 4 3.01g, EU 2 o 3 1.29g, Dy 2 o 3 , 3.40g, add corundum balls of the same weight in the porcelain ball mill jar, fully grind and mix for more than 10 hours, place in the corundum crucible, in N 2 +H 2 Under the protection of mixed gas, sinter at 1350°C for 4 hours, cool naturally, crush and sieve to obtain the original luminescent powder. Put the original powder in a stirring zirconium oxychloride solution at 60°C and mix evenly, add ammonia water dropwise and stir for 2 hours, wash with water to make a 40% slurry, add triethanolamine at a concentration of 50%, and stir evenly at 120 Dry and disperse at ℃, and sieve to obtain heat-resistant, water-resistant, high-brightness, long-lasting luminous powder that emits blue-green light.

Embodiment 3

[0030] Weigh 40 g of the heat-resistant, water-resistant, high-brightness, long-lasting luminescent powder that emits yellow-green light made according to Example 1, and 60 g of the heat-resistant, water-resistant, high-brightness, long-lasting luminescent powder that emits blue-green light made according to Example 2 are fully mixed evenly, and prepared Heat-resistant and water-resistant high-brightness long-lasting luminescent powder that emits green light.

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PUM

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Abstract

The invention relates to a heat-resistant, water-resistant, high-brightness, long-lasting luminescent powder and a preparation method thereof. The invention discloses a heat-resistant, water-resistant, high-brightness and long-lasting luminous powder, which is made of divalent europium and trivalent dysprosium as activators and magnesium strontium aluminate as a matrix. The preparation is first to prepare the luminous raw powder, and then coat the luminescent raw powder with zirconia and triethanolamine. The luminescent powder of the invention has higher afterglow brightness and longer afterglow luminous time, and has better heat resistance, water resistance, good fluidity and easy dispersion. The preparation method of the invention has the advantages of simple process, easy operation and good product quality.

Description

(1) Technical field [0001] The invention relates to a heat-resistant, water-resistant, high-brightness, long-lasting luminescent powder and a preparation method thereof. (2) Background technology [0002] The traditional ZrS series long afterglow luminescent powder has low brightness due to poor chemical stability and even some are radioactive. It is rarely used at present. The long-lasting luminescent materials of aluminate and silicate systems invented in the early 1990s have been applied in daily necessities, such as weakly illuminated signs and handicrafts, due to their good chemical stability and other advantages. , but due to their poor heat resistance or water immersion resistance, their use in many fields has been limited. For example, the material begins to oxidize and loses its luminescent properties in the air above 600°C. It cannot be used directly in ceramic glazes above 600 ° C, and for example, its poor water resistance can not be used directly in water medi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80
Inventor 董昇
Owner 董升
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