Method for preparing long-afterglow luminescent material

A long afterglow luminous, liquid technology, applied in the direction of luminescent materials, chemical instruments and methods, can solve the problems of difficult grinding, high product hardness, difficult control of process conditions, etc., to achieve the effect of easy crushing and screening, and hardness reduction

Inactive Publication Date: 2002-11-20
DALIAN UNIV OF TECH
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Problems solved by technology

[0008] The purpose of the present invention is to provide a simple and economical industrialized preparation method and process technology to solve the problem of high raw material cost, difficult control of process conditions, long reaction time at high temperature, high hardness of the p

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0011] 1. the preparation of aluminum oxide, the preparation of aluminum alkoxide adopts bibliographical reports or industrialized conventional synthetic method (such as: the synthesis of aluminum isopropoxide is that metal aluminum sheet and isopropanol are added in the reactor, in a small amount In the presence of a catalyst, carry out back distillation, the reaction generates aluminum isopropoxide and releases hydrogen), the synthesized primary product generally contains a small amount of metal impurities, which must be purified by vacuum distillation or solvent extraction, and the purified product is dissolved in the corresponding alcohol A 20-80% wt solution is formed, ready for use in the next step.

[0012] 2. The preparation of optical precursor, get the alcoholic solution of a certain amount of 20~80% alkoxide aluminum and mix with calculated strontium carbonate, activator, sensitizer and flux at room temperature, add and stir simultaneously 30 minutes (200 rev / min), ...

Embodiment 1

[0018] React metal aluminum flakes with slightly excess alcohol to synthesize aluminum alkoxide, and purify it at the same time; take a certain amount of newly synthesized pure aluminum alkoxide Al(OR) 3 , such as aluminum ethoxide, aluminum propoxide, aluminum butoxide, the weight of which varies within 1-2kg. It is dissolved in the corresponding alcohol to form an organoaluminum alcohol solution; to this solution is added strontium carbonate SrCO 3 0.5~0.6kg, then add Eu 2 o 3 、Dy 2 o 3 、H 3 BO 3 , (NH 4 ) 2 HPO 4 , the amount of which varies within 0 to 30 g; the solution is vigorously stirred and ultrasonically dispersed to form a uniform suspension, and then an aqueous solution containing alcohol and carboxyl / ester-based organic molecules is added to the suspension, and the amount of water is in the range of 250 to 500 g Inside, the amount of alcohol is not limited, carboxyl / ester-based organic molecules and Al(OR) 3 The molar ratio is 0.01 to 0.5. After addin...

Embodiment 2

[0020] In Example 1, strontium carbonate SrCO 3 Change it to 0.2-0.3kg, and other processes are the same as in Example 1 to obtain blue luminous powder.

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Abstract

The preparation method of strontium aluminate series light-storing long-afterglow luminescent powder body material is characterized by that it uses industrial aluminium as raw material and makes it into alkoxy aluminium, then according to the sol-gel characteristics of alcohol salt makes the strontium carbonate, excitation agent and sensitizing agent produce reaction and implement latex covering treatment instead of traditional solid ball-grinding mixing process of make the luminescent precursor material obtain nano or molecular level combination, then makes the above-mentioned material undergo the processes of drying and calcination so as to obtain the invented product.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic materials, and in particular relates to a preparation method of strontium aluminate series light storage type long afterglow luminescent powder materials. Background technique [0002] Aluminate luminescent bodies synthesized with rare earth elements such as europium as activators are a new generation of luminescent materials with wide applications. Due to its non-radioactive, corrosion-resistant and energy-saving characteristics, it has shown broad application prospects in the fields of architectural decoration, fire emergency, luminous switches, artworks, paints, luminous ceramics, and various luminous signs and signs. However, due to the high production cost and unaffordable sales price of this luminescent material, its application range and product consumption are limited. The usual production process of this type of luminescent material includes the following unit processes:...

Claims

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Application Information

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IPC IPC(8): C09K11/55
Inventor 宁桂玲朱维波袁树来张守臣林源孟伟
Owner DALIAN UNIV OF TECH
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