Treatment method for coating photoluminescence luminescent powder

A technology of photoluminescence and processing methods, applied in the direction of luminescent materials, chemical instruments and methods, etc., to achieve the effects of reducing production costs, overcoming the problem of light attenuation, and simple operation

Inactive Publication Date: 2005-06-15
LANZHOU UNIVERSITY
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  • Treatment method for coating photoluminescence luminescent powder
  • Treatment method for coating photoluminescence luminescent powder
  • Treatment method for coating photoluminescence luminescent powder

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[0021] The reagents used in the experiment are magnesium acetate (analytical grade), isopropanol (analytical grade), and trifluoroacetic acid (chemical grade). The fluorescent powder is BaMgAl10O17:Eu, hereinafter referred to as BAM.

[0022] Dissolve 0.005 mol of magnesium acetate in 15 ml of isopropanol, add 2 ml of trifluoroacetic acid (TFA) and an equal amount of distilled water, stir for 2 h, then add isopropanol to dilute the solution to 300 ml. 0.2% by mass (MgF 2 / BAM) Add BAM fluorescent powder into the solution, soak and stir for 15 minutes, evaporate to dryness at 80°C for 24 hours to obtain gel-coated BAM fluorescent powder, and then bake at 300°C for 15 minutes to obtain MgF 2 Encapsulated BAM phosphor.

[0023] The ESCA LAB 210 type multifunctional electron spectrometer (VG company) is carried out photoelectron energy spectrum (XPS) measurement to the phosphor powder after the present invention is processed; With the JSM-5600LV low vacuum electron microscope (SE...

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Abstract

A process for coating on the surface of photoluminescent fluorescent particles, Ba1-xMxMgAl10O17:Eu2+, includes such steps as coating by sol-gel method whose sol-gel system is prepared from metallic alkoxide (or acetate), alcohol, trifluoroacetic acid, water and inorganic photoluminescent fluorescent powder, drying and calcining.

Description

technical field [0001] The invention relates to a method for surface coating treatment of photoluminescent fluorescent powder, especially for inorganic fluorescent materials, such as Ba 1-x m x MgAl 10 o 17 :Eu 2+ Phosphor powder of the class, the method of carrying out coating treatment. Background technique [0002] When making light-emitting devices with photoluminescent phosphor powder, it is generally mixed with organic solvent paste, and then the fluorescent material is applied to the substrate by coating or printing, and then baked at a high temperature of 500-600 ° C to remove the organic solvent. The fluorescent material is "fixed" on the substrate. In the subsequent process, it may also need to be processed by high temperature roasting. The high-temperature calcination process will oxidize the luminescent center of the fluorescent material, or produce other effects, resulting in a decrease in the luminous intensity of the fluorescent material. According to r...

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Application Information

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IPC IPC(8): C09K11/02
Inventor 王育华李峰
Owner LANZHOU UNIVERSITY
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