Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

White light fluorescence powder excitated by blue light and its application mfg. technology and mfg. apparatus

A technology of blue light excitation and manufacturing process, applied in the field of phosphors, can solve the problems of difficult cubic garnet structure, unsuitable for large-scale production, difficult to achieve particle size, etc., and achieves low cost of manufacturing equipment, good fluidity, and narrow particle size distribution. Effect

Inactive Publication Date: 2005-03-23
NANJING UNIV OF TECH
View PDF0 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional synthesis method of this kind of material is to use high-temperature solid-state reaction and then pulverize by ball milling. Its disadvantages are that the synthesis temperature is too high, the product particle size is too large and the particle size distribution is wide, it is difficult to achieve a satisfactory particle size, and it is extremely difficult to obtain a single-phase cubic garnet structure
[0003] At present, there are soft chemical preparation methods such as sol-gel method, co-precipitation method and hydrothermal method for preparing YAG phosphor at home and abroad. Although powders with better performance can be obtained, they are prone to agglomeration and the cost is high. Disadvantages such as not being suitable for mass production

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
  • White light fluorescence powder excitated by blue light and its application mfg. technology and mfg. apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] weigh Y 2 o 3 28.2404g, Gd 2 o 3 8. Dissolve 1947g in an appropriate amount of nitric acid to form a clear aqueous solution of rare earth nitrate, then add Al(NO 3 ) 3 9H 2 O 189.4611g, H 2 SiO 3 3.9050g, Ce(NO 3 ) 3 ·6H 2 O2.5502g, add deionized water to dilute 2000ml, this mixed solution is the precursor solution to be atomized, and add the solution to the automatic liquid addition device 1. The temperature of the multi-temperature zone tubular reactor 6 is raised to 1300° C., and the temperature is controlled by the temperature control system 7 . The tubular reaction furnace includes a quartz reaction tube, a cylindrical furnace, a resistance heating wire wrapped around the outer wall of the furnace, and light refractory bricks and insulation cotton on the outside. The tubular reactor is controlled by multiple temperature zones, including 4 independent heating Each temperature zone is equipped with a temperature measuring point, the reaction furnace is ...

Embodiment 2

[0045] weigh Y 2 o 3 231.3673g, Gd 2 o 3 163.8944g was dissolved in an appropriate amount of nitric acid to form a clear rare earth nitrate aqueous solution, and then Al(NO 3 ) 3 9H 2 O 1894.6110g, H 2 SiO 3 39.0500g, Ce(NO 3 ) 3 ·6H 2 O25.5020g, add deionized water to dilute 5000ml, this mixed solution is the precursor solution to be atomized, and add the solution to the automatic liquid adding device 1. The temperature of the multi-temperature zone tubular reactor 6 is raised to 800° C., and the temperature is controlled by the temperature control system 7 . The tubular reaction furnace includes a quartz reaction tube, a cylindrical furnace, a resistance heating wire wrapped around the outer wall of the furnace, and light refractory bricks and insulation cotton on the outside. The tubular reactor is controlled by multiple temperature zones, including 10 independent heating Each temperature zone is equipped with a temperature measuring point, the angle between t...

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

No PUM Login to View More

Abstract

The invention discloses a blue light-excited white light fluorescent powder and its use and its manufacture process and device. Its molecular formula is aY2O3.bGd2O3. (1.5-a-b)Re2O3.2.5Al2O3.xSiO2, where Re is two or above of Ce, Eu, Tm and Tb; 0<a<1.5, 0<=b<1.5, 0<x<3; it can be used to manufacture white LEDs. Its process steps include preparing precursor solution, aerating, atomizing, reacting, collecting and after-processing. Its manufacture device includes a liquid fillingdevice, an atomization generating device, a gas supplying device, a gas flux control device, a reaction furnace, a powder collecting device, and a purifying processing device. The invention has simple process, high efficiency, good quality, and suitable for industrial production; and low-cost.

Description

technical field [0001] The invention relates to a fluorescent powder, in particular to a blue light-excited white light fluorescent powder, and also relates to its use, manufacturing process and manufacturing device. Background technique [0002] Yttrium aluminum garnet Y 3 al 5 o 12 (referred to as YAG) has excellent thermal conductivity and mechanical strength as well as good physical and chemical properties. It is widely used as a host material for lasers and luminescence. Ce 3+ The activated yttrium aluminum garnet YAG:Ce has an excitation wavelength near 460nm, which can effectively absorb the blue light emitted by GaN. The emission wavelength of YAG:Ce is about 540nm, and it can be combined with the blue light of LED to form high-brightness white light, and a white light source with high luminous efficiency and suitable for lighting can be obtained. The energy consumption of this type of LED (light-emitting diode) white light tube is about 20% of that of commonly...

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): C09K11/80
CPCY02B20/181Y02B20/00
Inventor 王海波戚发鑫朱宪忠崔燕王苏黄如喜
Owner NANJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com