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Rare-earth alumo silicate matrix fluorescent material, and preparation method

A technology of fluorescent materials and silicates, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problem that it is not easy to accurately control the composition

Inactive Publication Date: 2007-07-11
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the method of preparing the corresponding sol by using aluminum alkoxide as the aluminum source and tetraethyl orthosilicate as the silicon source not only has limitations in cost and pollution, but also the controlled hydrolysis process is not easy to precisely control the composition

Method used

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  • Rare-earth alumo silicate matrix fluorescent material, and preparation method
  • Rare-earth alumo silicate matrix fluorescent material, and preparation method

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preparation example Construction

[0014] 2) Preparation of composite sol: according to the fixed ratio of atomic ratio Al:Si=2:1, Si is replaced by SiO 2 added to the alumina sol in the form of SiO 2 The size is 40-80nm; Ca, Sr, Ba are added to the alumina sol in the form of nitrate according to the stoichiometric ratio; Eu is added to the alumina sol in the form of europium nitrate, and the number range is the number of atomic moles: 0.01 ≤x≤0.1; the above composite sol is mechanically stirred for 3-5 hours, and then adjusted to pH=1-3 with aqueous nitric acid solution to obtain a rare earth composite sol without precipitation.

[0015] 3) High temperature firing of xerogel particles:

[0016] The above rare earth composite sol is atomized and granulated on a commercial spray dryer to obtain xerogel particles. Compressed air temperature is 110°C-130°C, dry air volume is 130m 3 / h-150m 3 / h, material flow 1.3L / h-1.5L / h conditions to prepare xerogel particles; 2 +5%H 2 Burn in the mixed gas for 3-5 hours....

example 1

[0019] According to the ratio of mass ratio alumina: water = 3: 97, the pseudo-boehmite with a purity of 95% is mixed with distilled water, and under the condition of mechanical stirring, it is titrated to pH = 1-3 with a concentration of 30% nitric acid aqueous solution , that is, to obtain alumina sol; according to the fixed ratio of atomic ratio Al: Si = 2: 1, SiO with a size of 40nm 2 Add the alumina sol in the form of particles; divide the alumina sol into 5 parts, and add the rare earth ion Eu into the alumina sol in the form of europium nitrate. 0.02, 0.04, 0.06, 0.08; Sr is added to the alumina sol in the form of strontium nitrate, and the amount added is according to the provided chemical formula Sr 2-x al 2 SiO 7 Metering and mechanical stirring for 3 hours to obtain a composite sol; the atomization parameters of the composite sol are set as follows: the compressed air temperature is 110°C, and the dry air volume is 130m 3 / h, the material flow is 1.3L / h, to obtai...

example 2

[0021] According to the ratio of mass ratio alumina: water = 4: 96, the pseudo-boehmite with a purity of 95% is mixed with distilled water, and under the condition of mechanical stirring, it is titrated to pH = 1-3 with a concentration of 30% nitric acid aqueous solution , that is, to obtain alumina sol; according to the fixed ratio of atomic ratio Al:Si=2:1, SiO with a size of 60nm 2 Add the alumina sol in the form of particles; the rare earth ion Eu is added to the alumina sol in the form of europium nitrate, and the amount added is x=0.02 according to the number of atomic moles; divide the previous alumina sol into 3 parts, Sr and Ba Add to the alumina sol in the form of strontium nitrate and barium nitrate respectively, and the amount added is according to the chemical formula provided by Sr 1.98-a Ba a al 2 SiO 7 Metering, where a = 0.1, 0.2, 0.4; mechanically stirred for 4 hours to obtain a composite sol; the atomization parameters of the composite sol are set as foll...

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Abstract

The invention discloses an aluminosilicate base fluorescent powder material and making method doped rare earth europium ion excited by ultraviolet in the luminous material technical domain, wherein the base of fluorescent powder possesses calcium yellow feldspar structure with chemical formula at M2-xAl2SiO7:xEu2+ (M is one of Ca, Sr, Ba; Eu exists at bivalent ion type; x is atom molar quantity between 0.1 and 0.6). The making method of sol-gal process of fluorescent powder comprises the following steps: making the gel with nanometer cement aluminium particle; adding Si at nanometer SiO2 pattern; adding other components at nitrate pattern to form composite gel; spraying; graining; sintering; obtaining the product with particle size at 5um without milling.

Description

【Technical field】 [0001] The invention relates to an ultraviolet-excited rare earth europium ion-doped aluminosilicate matrix phosphor material and a preparation method thereof, belonging to the technical field of luminescent materials. 【Background technique】 [0002] The rare earth ion-doped aluminosilicate material excited by ultraviolet light can be applied in lighting display technology. For M with calcite structure 2 al 2 SiO 7 The aluminosilicate matrix of (M=Ca, Sr, Ba) has the advantages of low cost, a framework structure composed of silicon-oxygen tetrahedrons, high chemical stability and high stability against ultraviolet radiation; under the activation of rare earth ions , easy to obtain excellent luminescent properties. [0003] Thanks to M 2 al 2 SiO 7 (M=Ca, Sr, Ba) aluminosilicate matrix composition is complex, it is not easy to make the composition uniform by traditional solid-phase synthesis method, and there are great limitations in the preparation o...

Claims

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Application Information

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IPC IPC(8): C09K11/80
Inventor 王达健
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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