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

Method for preparing high-efficiency phosphor powder

A fluorescent powder and high-efficiency technology, applied in chemical instruments and methods, luminescent materials, electrical components, etc., can solve the problems of uneven particle size distribution, increase the scattering coefficient, and affect the luminous performance, so as to increase the reactivity, The effect of lowering the roasting temperature and simplifying the process

Active Publication Date: 2015-11-04
西安鸿宇光电技术有限公司 +1
View PDF6 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of product quality, the powder is easier to agglomerate after being calcined at high temperature (above 1800 degrees), and the later crushing will cause damage to the surface of the particles, resulting in a large number of surface defects, which directly affect the luminescent performance
In addition, the distribution of particle size is not uniform, so that the bulk density of the powder is small and the scattering coefficient is increased, which reduces the luminous efficiency.

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
  • Method for preparing high-efficiency phosphor powder
  • Method for preparing high-efficiency phosphor powder
  • Method for preparing high-efficiency phosphor powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1 (Ca 0.14 Sr 0.85 )(Al 0.5 Si 0.5 ) 2 N 3 : Eu 0.01

[0049] The raw material that synthesis embodiment 1 material adopts is Sr 3 N 2 , Ca 3 N 2 , Si 3 N 4 , AlN, Eu 2 o 3 . Weigh 100 g of the raw materials shown below and mix them.

[0050]

[0051] After weighing the above raw materials, put the powder in a mortar and mix evenly in a glove box (oxygen content<1ppm, water content<1ppm).

[0052] The mortar is onyx or alumina ceramic. Put the mixed powder into the crucible, compact it lightly, then take it out from the glove box and place it in a high-temperature graphite furnace. The material of the crucible is molybdenum or boron nitride. After the graphite furnace is evacuated and filled with nitrogen, it starts to heat up at a rate of 10°C / min, and the pressure of nitrogen is 1 atmosphere. Heat up to 1800°C and keep warm for 6 hours. After the keep warm, turn off the power and cool down with the furnace. The burnt samples were taken o...

Embodiment 8

[0055] Example 8 (Ca 0.14 Sr 0.85 )(Al 0.5 Si 0.5 ) 2 N 3 : Eu 0.01

[0056] The raw material that synthesis embodiment 1 material adopts is Sr 3 N 2 , Ca 3 N 2 , Si 3 N 4 , AlN, Eu 2 o 3 , Weigh 100 g of the raw materials shown below and mix them. And using 5.0wt% porous aluminum fluoride (AlF 3 ) as a flux.

[0057]

[0058] After weighing the above raw materials, put the powder in a mortar and mix evenly in a glove box (oxygen content<1ppm, water content<1ppm).

[0059] The mortar is onyx or alumina ceramic. Put the mixed powder into the crucible, compact it lightly, then take it out from the glove box and place it in a high-temperature graphite furnace. The material of the crucible is molybdenum or boron nitride. After the graphite furnace is evacuated and filled with nitrogen, it starts to heat up at a rate of 10°C / min, and the pressure of nitrogen is 1 atmosphere. Heat up to 1750°C and keep warm for 6 hours. After the keep warm, turn off the power ...

Embodiment 13

[0062] Example 13 (Ca 0.40 Sr 0.59 )(Al 0.5 Si 0.5 ) 2 (N 0.9 f 0.1 ) 3 : Eu 0.01

[0063] The raw material that synthetic embodiment 13 materials adopt is Sr 3 N 2 , Ca 3 N 2 , Si 3 N 4 , AlN, EuN, weigh 100g of the raw materials shown below and mix them. And use 1.0wt% porous sodium fluoride (NaF) as a flux.

[0064]

[0065] After weighing the above raw materials, put the powder in a mortar and mix evenly in a glove box (oxygen content<1ppm, water content<1ppm).

[0066] The mortar is onyx or alumina ceramic. Put the mixed powder into the crucible, compact it lightly, then take it out from the glove box and place it in a high-temperature graphite furnace. The material of the crucible is molybdenum or boron nitride. After the graphite furnace is evacuated and filled with nitrogen, it starts to heat up at a rate of 10°C / min, and the pressure of nitrogen is 1 atmosphere. Heat up to 1750°C and keep warm for 6 hours. After the keep warm, turn off the power ...

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
The average particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to View More

Abstract

The present invention relates to a method for preparing high-efficiency phosphor powder, and belongs to the field of LED inorganic light-emitting materials. The phosphor powder material has the following chemical formula: (Ca, Q) 1-y (Al, Si) 2 (N, T) 3: Ay, wherein Q including Li, Mg, Sr, Ba, Zn and Be, T comprises C, O , F, Cl and Br, A is an emission center element, and 0 <y<=0.5. The phosphor powder uses a porous halide as a fluxing agent, and the formula is MRb, wherein M includes Li, Na, K, Mg, Ca, Sr, Ba, Al, Eu, and NH4 +, R comprises F, Cl and Br, and 1<= b<=3. The method is capable of reducing single-phase (Ca, Q) 1-y (Al, Si) 2 (N, T) 3: Ay nitride generation temperature, crystallinity and morphology are improved to facilitate light absorption and transmitting, and light conversion efficiency of nitride red powder is improved.

Description

technical field [0001] The invention relates to a preparation method of high-light-efficiency fluorescent powder, which belongs to the field of LED inorganic light-emitting materials. Background technique [0002] GaN-based light-emitting diode (Light-Emitting Diode), which has the advantages of energy saving, no pollution sources such as mercury, high efficiency, low maintenance cost, long life and small size, is a new type of light-emitting device known as the solid-state lighting in the 21st century. It is widely used in indoor lighting, signal lights, indicator lights, vehicle lights, display screens, advertising screens, outdoor large screens and other light-emitting devices. It has gradually replaced traditional light bulbs and fluorescent lamps. It is a new type of energy-saving and environmentally friendly green energy. The manufacturing technology of white LED mainly includes: (1) the combination of three kinds of single-color LEDs such as blue, green and red; (2) b...

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
IPC IPC(8): C09K11/64C09K11/65H01L33/50
Inventor 权恒道张琳
Owner 西安鸿宇光电技术有限公司
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