Aluminate-base rare earth long afterglow luminous material synthesizing method

A technology of long afterglow luminescence and synthesis method, which is applied in the direction of luminescent materials, chemical instruments and methods, etc. It can solve the problems of high reaction temperature, long time, easy agglomeration, etc., and achieve the effect of low temperature, fast speed and fine particle size

Inactive Publication Date: 2007-03-21
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 performance of the product
But this method still has many difficulties that are difficult to overcome: the chemical dosage ratio of the product is not well controlled, the controllability and repeatability of the process are poor, and there is pollution, it is difficult to meet the requirements of actual production applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Put the uniformly ground and mixed material into a high-purity quartz crucible and place it in a microwave plasma synthesis chamber; after vacuuming, turn on the microwave generator and fill it with N at a flow rate of 100ml / min. 2 Gas, adjust the microwave power to 500W; then adjust the N 2 The flow rate is 700ml / min, the pressure is 5500Pa, the microwave power is adjusted to 1300W, and kept for 1.5 hours.

Embodiment 2

[0024] Put the uniformly ground and mixed materials into a high-purity quartz crucible and place it in a microwave plasma resonant cavity; turn on the microwave generator after vacuuming, fill in Ar gas at a flow rate of 100ml / min, and adjust the microwave power to 500W; then adjust the Ar The flow rate reaches 750ml / min, and H is filled at a flow rate of 15ml / min 2 , the pressure reached 5500Pa, the microwave power was adjusted to 1300W, and kept for 1.5 hours.

Embodiment 3

[0026] Put the uniformly ground and mixed material into a high-purity quartz crucible and place it in a microwave plasma resonant cavity; after vacuuming, turn on the microwave generator and fill it with H at a volume of 100ml / min 2 Gas, adjust the microwave power to 500W; then adjust the H 2 The flow rate is 780ml / min, the pressure is 5500Pa, and the microwave power is adjusted to 1300W 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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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80
Inventor 王兵卢忠远
Owner 王兵
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