Aluminate-base rare earth long afterglow luminous material synthesizing method

A technology of long afterglow luminescence and synthesis method, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of poor control of product chemical dose ratio, increase of grain defects, long time, etc., to achieve enhanced diffusion and migration ability, high Chemically active, fast heating effect

Inactive Publication Date: 2006-05-24
王兵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: high reaction temperature (about 1600°C), long time (reaction over 3 hours), low purity of the obtained material, poor uniformity, easy agglomeration, and the fired product needs to be pulverized and milled. Fine, resulting in increased grain defects, affecting the cost and perform

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1:

[0020] Put the uniformly ground and mixed materials into the high-purity quartz crucible and place it in the microwave plasma synthesis chamber; turn on the microwave generator after vacuuming, and charge N at a flow rate of 100ml / min 2 Gas, adjust the microwave power to 500W; then adjust N 2 The flow rate is 700ml / min, the pressure is 5500Pa, the microwave power is adjusted to 1300W, and it is maintained for 1.5 hours.

Example Embodiment

[0021] Example 2:

[0022] Put the uniformly ground and mixed materials into the high-purity quartz crucible and place them in the microwave plasma resonance cavity; turn on the microwave generator after evacuating, fill with Ar gas at a flow rate of 100ml / min, adjust the microwave power to 500W; then adjust the Ar Flow rate to 750ml / min, charge H at 15ml / min flow rate 2 , The pressure reaches 5500Pa, the microwave power is adjusted to 1300W, and it is maintained for 1.5 hours.

Example Embodiment

[0023] Example 3:

[0024] Put the uniformly ground and mixed materials into the high-purity quartz crucible and place them in the microwave plasma resonance cavity; after vacuuming, turn on the microwave generator, and fill the H with a 100ml / min melt volume 2 Gas, adjust the microwave power to 500W; then adjust H 2 The flow rate is 780ml / min, the pressure is 5500Pa, the microwave power is adjusted to 1300W, and it is maintained for 1.5 hours.

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PUM

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Abstract

The invention relates to aluminate based rare earth long afterglow emitting material and the method to compounding. The material after grinding to equal is put into high purity quartz crucible and laid in the microwave plasma resonant cavity, filling with reducing atmosphere at 100ml/min flux to make the working pressure reach 4000-5500Pa, and microwave power reach 1200-1300W and keeping for 1-2 hours. The invention has low sintering temperature, short time and does not need to grind, and the reaction atmosphere is pure to ensure the capability of the product.

Description

Technical field [0001] The invention relates to a synthesis method of an aluminate-based rare earth long-lasting luminescent material, in particular to a high-temperature solid-phase reaction synthesis method of the luminescent material using microwave plasma in a weak reducing atmosphere. Background technique [0002] The common preparation method of aluminate-based rare earth long afterglow emitting materials is to combine a high-purity luminescent substrate with an activator, a co-activator, namely Eu 2 o 3 、Dy 2 o 3 , SrCO 3 、Al 2 o 3 After being micronized with boric acid, it is mechanically mixed evenly, and then undergoes a high-temperature solid-state reaction in a high-temperature atmosphere furnace to obtain the final desired product. The disadvantages of this method are: high reaction temperature (about 1600°C), long time (reaction over 3 hours), low purity of the obtained material, poor uniformity, easy agglomeration, and the fired product needs to be pulve...

Claims

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Application Information

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IPC IPC(8): C09K11/80
Inventor 王兵卢忠远
Owner 王兵
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