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

A long afterglow luminescent powder, high brightness technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of heat resistance, water resistance not meeting the requirements, poor brightness and afterglow brightness, etc., and achieve good fluidity. , The effect of long afterglow luminous time and high afterglow brightness

Inactive Publication Date: 2005-05-11
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, E U2 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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Abstract

A waterproof and thermal resistant high luminosity long persistence fluorescent powder is produced by: using europium (Eu2+) and dysprosium (Dy3+) as activators and magnesium and strontium aluminate as matrix. It contains two steps i.e. first, preparing fluorescent powders, second, covering jargonia and triethanolamine on it. The products are of high luminosity, long persistence, liquidity, good resistance to effect of heat and water and dispersed easily. The process is facility and operated-friendly.

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 Applications(China)
IPC IPC(8): C09K11/80
Inventor 董昇
Owner 董升
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