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Preparation method of aluminate-based long-afterglow luminous material

A long afterglow luminescence, aluminate technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of unstable paint and ink system, difficult mixing of raw materials, deterioration of luminescence performance, etc., and achieve perfect combustion reaction process, spherical shape. High strength and low hardness

Active Publication Date: 2012-08-01
JIANGSU LIGANG SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The technical problems of this method are: high synthesis temperature and high energy consumption; it is difficult to mix the raw materials uniformly, the crushing and grinding process destroys the crystal form and introduces impurities, which deteriorates the luminescent performance; the product has high hardness and coarse grains; the production cycle is long ( About 3 to 5 days), etc., the paint and ink system prepared with it are unstable and easy to precipitate

Method used

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  • Preparation method of aluminate-based long-afterglow luminous material
  • Preparation method of aluminate-based long-afterglow luminous material
  • Preparation method of aluminate-based long-afterglow luminous material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1, a method for preparing an aluminate-based long-lasting luminescent material, the chemical characteristic expression of which is:

[0023]

[0024] In the formula:

[0025] M is one or more of Sr, Ca, Ba, Mg; RE can be one of Dy, Nd; Ln can be one or more of La, Dy, Nd, Pr; Moore, Moore, Moore, Moore.

[0026] Its preparation method steps are as follows:

[0027] (1) The purity of not less than 99.99% high-purity rare earth oxide Eu 2 o 3 、Dy 2 o 3 、Nd 2 o 3 , La 2 o 3 or Pr 2 o 3 One or several of them are accurately weighed according to the stoichiometric ratio, adding excess HNO 3 , after heating to 60°C to dissolve, the analytically pure M(NO 3 ) 2 and Al(NO 3 ) 3 ?9H 2 O is added to the solution at a molar ratio of 1:2, M is one or more of Sr, Ca, Ba, Mg, and cosolvent H is added at the same time 3 BO 3 , H 3 BO 3 The addition amount is 5% of the mass of the material, and then add the combustion agent to the material, the mo...

Embodiment 2

[0031] Example 2, a preparation method of an aluminate-based long-lasting luminescent material whose chemical characteristic expression is:

[0032]

[0033] In the formula:

[0034] M is one or more of Sr, Ca, Ba, Mg; RE can be one of Dy, Nd; Ln can be one or more of La, Dy, Nd, Pr; Moore, Moore, Moore, Moore.

[0035] Its preparation method steps are as follows:

[0036] (1) The purity of not less than 99.99% high-purity rare earth oxide Eu 2 o 3 、Dy 2 o 3 、Nd 2 o 3 , La 2 o 3 or Pr 2 o 3 One or several of them are accurately weighed according to the stoichiometric ratio, adding excess HNO 3 , after heating to 70°C to dissolve, the analytically pure M(NO 3 ) 2 and Al(NO 3 ) 3 ?9H 2 O is added to the solution at a molar ratio of 1:2, M is one or more of Sr, Ca, Ba, Mg, and cosolvent H is added at the same time 3 BO 3 , H 3 BO 3The addition amount is 20% of the mass of the material, and then add a combustion agent to the material, the molar ratio...

Embodiment 3

[0040] Example 3, preparation experiment 1 of an aluminate-based long-lasting luminescent material.

[0041] Eu with purity ≥99.99% 2 o 3 and Dy 2 o 3 Weigh 0.704g and 1.191g respectively, and use 28g of 68% HNO 3 After heating (60°C) to dissolve, 21.164g of Sr(NO 3 ) 2 and 75.026g of Al(NO 3 ) 3 ?9H 2 O was added to the solution while adding 15% H 3 BO 3 Cosolvent, then add urea according to the molar ratio of combustion agent / nitrate of 3:1, then add 500ml deionized water, use ultrasonic wave + strong stirring at 80°C to make the solution clear; put the solution into a drying oven at 120°C Concentrate in medium, then quickly move into a high-temperature electric furnace heated to 500 ° C, keep warm in an air atmosphere for combustion synthesis reaction (time is about 10 minutes), cool to room temperature to obtain a foamy product with a loose structure; grind the foamy product to obtain Ultrafine powder, then put into a calciner, calcined at 1100°C for 1h, using 9...

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Abstract

The invention belongs to the technical field of luminous materials, and relates to a preparation method of an aluminate-based long-afterglow luminous material. The chemical characteristic expression formula of the aluminate-based long-afterglow luminous material is shown in the specifications. A low-temperature combustion method and a high-temperature solid phase method are comprehensively applied to the preparation and production of the aluminate-based long-afterglow luminous material, so that the defects of incomplete crystalizing process of a product obtained in the low-temperature combustion method and poor luminous performance are overcome, and the problems of high reaction temperature, high production period, high energy consumption, blocky form high hardness of an obtained product,damage to a crystal form in a smashing process, severe deterioration of luminous performance and the like are solved; a dispersing way of ultrasonic combined constant-temperature strong stirring is adopted in a raw material mixing process, so that the raw material mixing uniformity is enhanced effectively, and a combustion reaction process is more complete; and meanwhile, a grinding procedure is added between a low-temperature combustion reaction and a high-temperature roasting procedure simultaneously, so that the aluminate-based long-afterglow luminous material with small powder granularityis obtained.

Description

technical field [0001] The invention relates to a preparation method of a long afterglow luminescent material, in particular to a preparation method of an aluminate long afterglow luminescent material, which belongs to the technical field of luminescent materials. Background technique [0002] The current industrial production method of aluminate long-lasting luminescent materials is generally a high-temperature solid-phase method. The technical problems of this method are: high synthesis temperature and high energy consumption; it is difficult to mix the raw materials evenly; the crushing and grinding process destroys the crystal form and introduces impurities, which deteriorates the luminescence performance; the product has high hardness and coarse grains; the production cycle is long ( About 3 to 5 days), etc., the paint and ink system prepared with it are unstable and easy to precipitate. Contents of the invention [0003] The technical problem to be solved by the pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64
Inventor 金佳佳冯立超
Owner JIANGSU LIGANG SCI & TECH
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