Aluminosilicate blue fluorescent powder and preparation thereof

A technology of blue fluorescent powder and aluminosilicate, applied in the direction of silicate, aluminum silicate, chemical instruments and methods, etc., can solve the problems of unfavorable environmental protection, poor luminous performance, high synthesis temperature, etc., and achieve good luminous characteristics and stability, easy industrial production, and low calcination temperature

Inactive Publication Date: 2009-04-22
SICHUAN UNIV
View PDF6 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few existing phosphors suitable for near-ultraviolet LEDs, and most of them are synthesized by high-temperature solid-state reaction, combustion and spray pyrolysis.
Patents for high-temperature solid-state reaction methods such as CN1844303A, CN101126024A, and CN101230271A have the advantages of simple process and low cost for preparing phosphors. Surface damage, which greatly reduces the performance of the phosphor
Patents on the combustion method such as CN101280189A and CN1730606A, the fluorescent powder prepared by this method has the advantages of narrow particle size distribution, low synthesis temperature, energy saving and time saving, etc., but the purity is low, the luminescence performance is poor, and a large amount of gas is released during the preparation process, which is not conducive to environmental protection
The patent of spray pyrolysis method, such as CN101050362A, has the advantages of uniform particle size distribution, high crystallinity, easy operation, and high production efficiency of phosphor powder prepared by this method, but cavities are easy to appear in the prepared phosphor particles, and collapse is easy to occur after high-temperature roasting , Broken, affecting the use effect

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Aluminosilicate blue fluorescent powder and preparation thereof
  • Aluminosilicate blue fluorescent powder and preparation thereof
  • Aluminosilicate blue fluorescent powder and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] According to chemical formula Ba 0.985 al 2 Si 2 o 8 :0.015Eu 2+ Weigh the Ba(NO 3 ) 2 (A.R.)0.985mol, Al(NO 3 ) 3 9H 2 O(A.R.)2mol, H 2 SiO 3 (A.R.)2mol, Eu 2 o 3 (99.99%) 0.0075mol; Then take respectively the surfactant polyethylene glycol and the fluxing agent H of the total mass of the above medicines 0.2wt%. 3 BO 3 ; Preparation of precipitant NH 4 HCO 3 solution, the concentration is 1mol / L; the weighed Eu 2 o 3 Dissolve with an appropriate amount of nitric acid, add an appropriate amount of deionized water and heat to 25°C for water bath treatment; add Ba(NO 3 ) 2 , Al(NO 3 ) 3 9H 2 O, H 2 SiO 3 , polyethylene glycol, stirring at the same time, and adding the precipitant solution several times, adjusting PH=7, and continuing to stir for 4 hours; standing, suction filtering, washing, and drying to obtain a fluffy precursor; After taking the good flux and mixing it evenly, place it in a muffle furnace protected by a reducing atmosphere for c...

Embodiment 2

[0031] According to chemical formula Ba 0.975 al 2 Si 2 o 8 :0.025Eu 2+ Weigh out BaCO 3 (A.R.)0.975mol, Al(NO 3 ) 3 9H 2 O(A.R.)2mol, H 2 SiO 3 (A.R.)2mol, Eu 2 o 3(99.99%) 0.0125mol; Then take respectively the surfactant polyethylene glycol and the fluxing agent MgF of the above drug gross mass 0.4wt% 2 ; Preparation of precipitant (NH 4 ) 2 CO 3 solution with a concentration of 2mol / L; the weighed Eu 2 o 3 Dissolve with an appropriate amount of nitric acid, add an appropriate amount of deionized water and heat to 45°C for water bath treatment; add BaCO to the above solution 3 , Al(NO 3 ) 3 9H 2 O, H 2 SiO 3 , polyethylene glycol, stirring at the same time, and adding the precipitant solution several times, adjusting PH=8, and continuing to stir for 3 hours; standing, suction filtering, washing, and drying to obtain a fluffy precursor; After taking the good flux and mixing it evenly, place it in a muffle furnace protected by a reducing atmosphere for ca...

Embodiment 3

[0033] According to chemical formula Ba 0.965 al 2 Si 2 o 8 :0.035Eu 2+ Weigh the Ba(NO 3 ) 2 (A.R.)0.965mol, Al(NO 3 ) 3 9H 2 O(A.R.)2mol, H 2 SiO 3 (A.R.)2mol, Eu 2 o 3 (99.99%) 0.0175mol; Then take respectively surfactant polyethylene glycol and fluxing agent Li 2 CO 3 ; Preparation of precipitant C 2 h 2 o 4 solution with a concentration of 3mol / L; the weighed Eu 2 o 3 Dissolve with an appropriate amount of nitric acid, add an appropriate amount of deionized water and heat to 65°C for water bath treatment; add Ba(NO 3 ) 2 , Al(NO 3 ) 3 9H 2 O, H 2 SiO 3 , polyethylene glycol, stirring at the same time, and adding the precipitant solution several times, adjusting PH=9, and continuing to stir for 2 hours; standing, filtering, washing, and drying to obtain a fluffy precursor; After taking the good flux and mixing it evenly, place it in a muffle furnace protected by a reducing atmosphere for calcination, the calcination temperature is 1100°C, and the c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to aluminosilicate blue phosphor powder and a preparation method thereof, and belongs to the technical field of luminescent material. The chemical formula of the aluminosilicate blue phosphor powder is Ba1-xAl2Si2O8:xEu<2+>, wherein x is more than 0 and less than 0.2. The preparation method comprises the following concrete steps: weighing barium salt, aluminum salt, silicic acid and europium oxide according to metering ratio of the elements in the chemical formula and proper amount of surfactant and fusing assistant; preparing a precipitating agent solution; dissolving the europium oxide by concentrated acid, and adding proper amount of deionized water to carry out water bath treatment; adding the barium salt, the aluminum salt and the surfactant, stirring the mixture, adding the precipitating agent solution into the mixture by multiple times, adjusting pH to more then or equal to 7, and continuously stirring the mixture for 0.5 to 4 hours; keeping standing or carrying out centrifugal precipitation, filtering, washing and drying the mixture to obtain a precursor; and after mixing the precursor and the fusing assistant evenly, placing the precursor and the fusing assistant into a muffle furnace protected by reducing atmosphere to calcine, so as to obtain the required phosphor powder. The preparation method adopts a one-time calcining technology and finishes doping at the same time of thermal decomposition of the precursor; and the prepared phosphor powder has the advantages of high luminous intensity and good stability and color rendering property, and is suitable to be used as near ultraviolet radiated blue phosphor powder of an LED excited by an InGaN tube core.

Description

1. Technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to an aluminosilicate blue fluorescent powder and a preparation method thereof. 2. Background technology [0002] In the context of rising global energy prices and global warming, energy conservation and environmental protection are more important than ever before. Global energy conservation goals and environmental protection standards that are oriented or enforced by national policies are more clear and consistent than in the past. urgent. In 2007, Australia first announced the phase-out of incandescent lamps before 2012, and the European Union successively announced that they would no longer sell incandescent lamps in 2009. Then Canada, Japan, and California in the United States have corresponding plans to promote energy-saving lamps to replace incandescent lamps or a timetable for restricting their use. . In recent years, the Chinese government has ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80C01B33/26
Inventor 朱达川马明星涂铭旌
Owner SICHUAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap