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Rare-earth doped red-light fluorescent powder and preparation method thereof

A technology of rare earth doping and fluorescent powder, which is applied in the field of fluorescent powder, can solve the problems of high price and high cost of rare earth element yttrium, and achieve the effect of less equipment, no pollution to the environment, and short process flow

Inactive Publication Date: 2012-02-01
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, commercial red powder has Y 2 o 3 :Eu 3+ , and the rare earth element yttrium is expensive, resulting in high cost

Method used

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  • Rare-earth doped red-light fluorescent powder and preparation method thereof
  • Rare-earth doped red-light fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] According to the combination ratio of the general formula Sr 3-x B 2 o 6 :xEu 3+ (0.01≤x≤0.1), weigh strontium carbonate 4.3993±0.001g, boric acid 1.2366±0.001g, europium oxide 0.03519±0.001g with an electronic balance;

[0020] The strontium carbonate, boric acid, and europium oxide raw materials weighed are placed in a beaker and fully mixed, and the uniformly mixed raw materials are placed in an agate mortar, and the mixture is fully ground with an agate mortar stick, and sieved to obtain a fine powder ( The particle size is 50-80μm);

[0021] Put the fine powder obtained after grinding and sieving into a beaker, and put it into an infrared rapid dryer for drying (100°C). The drying time is 1h, and the raw material fine powder is dried for later use;

[0022] Put the fine powder obtained after drying into a 15ml small cylindrical alumina crucible, then put the small crucible into a 500ml large cylindrical alumina crucible, and cover the small crucible with a smal...

Embodiment 2

[0028] Similar to Example 1, the difference is:

[0029] 1) Raw materials weighed: strontium carbonate 4.2812±0.001g, boric acid 1.2366±0.001g, europium oxide 0.1759±0.001g;

[0030] 2) First heat preservation at 500°C for 2 hours, and then calcination at constant temperature for 4 hours at 1250°C.

Embodiment 3

[0032] Similar to Example 1, the difference is:

[0033] 1) Raw materials weighed: strontium carbonate 4.4141±0.001g, boric acid 1.2366±0.001g, europium oxide 0.01759±0.001g;

[0034] 2) First heat preservation at 350°C for 1 hour, and then calcination at constant temperature for 3 hours at 1150°C.

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Abstract

The invention discloses rare-earth doped red-light fluorescent powder and a preparation method thereof, relates to fluorescent powder and provides the rare-earth doped red-light fluorescent powder which can be excited by near ultraviolet rays to emit red light and can be used as a red powder material in trichromatic phosphor and the preparation method thereof. The rare-earth doped red-light fluorescent powder comprises the following raw material compositions: strontium carbonate, boric acid and europium oxide. The combination proportion accords with a general formula of Sr3-xB2O6:xEu3+(0.01<=x<=0.1). According to the formula of Sr3-xB2O6:xEu3+(0.01<=x<=0.1) of the combination proportion, the strontium carbonate, the boric acid and the europium oxide are mixed, the mixture is ground, the ground mixture is sieved to obtain fine powder and the fine powder is dried; the obtained dried fine powder is calcined and then is cooled; the collected product is ground and sieved to obtain the rare-earth doped red-light fluorescent powder.

Description

technical field [0001] The invention relates to a fluorescent powder, in particular to a rare earth-doped red-light fluorescent powder and a preparation method thereof. Background technique [0002] Rare earth luminescent materials are one of the most important materials for preparing high-power white light LEDs, and white light can be obtained by exciting red, green and blue (RGB) tricolor phosphors by near-ultraviolet light emitted by near-ultraviolet LEDs. In the three-color phosphor system, the amount of red phosphor accounts for 60% to 80%, which plays an important role in modulating the color temperature and color rendering of white light. At present, commercial red powder has Y 2 o 3 :Eu 3+ , and the rare earth element yttrium is expensive, resulting in high cost. Therefore, research and development to find other new matrix system red powder has become a research and development hotspot. Rare earth borate series phosphors were developed in the late 1990s. In orde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/63
Inventor 陈朝王荣徐进
Owner XIAMEN UNIV