Large-particle high-brightness nitride red fluorescent powder as well as preparation method and application thereof

A red phosphor, nitride technology, applied in chemical instruments and methods, luminescent materials, electrical components, etc., can solve the problems of reducing the luminous efficiency of white light, low luminous intensity, harmful to human body, etc., to improve the luminous performance, and the preparation method is simple , easy to operate effect

Active Publication Date: 2021-11-02
烟台希尔德材料科技有限公司
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, red phosphor materials commonly used in this method such as Y2O3:Eu3+ and Y2O2S:Eu3+ has a lower luminous intensity, which will greatly reduce the luminous efficiency of white light
And the stability of Y2O2S:Eu3+ is low, and harmful gases will be produced during the preparation and use

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
  • Large-particle high-brightness nitride red fluorescent powder as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment provides a method for preparing a nitride red fluorescent powder, the structural formula of which is Sr 0.91 Ca 0.08 Eu 0.009 AlSiN 3 , including the following steps:

[0033] (1) Accurately weigh 121.6g Sr 3 N 2 , 5.448g Ca 3 N 2 , 64.444g Si 3 N 4 , 2.592g EuF 3 , 56.492gAlN, mixed evenly under the protective atmosphere of argon gas in the glove box, the materials mixed together were mixed by a high-speed crusher for 5 minutes, poured out of the crusher and passed through a 150-mesh nylon sieve, and then mixed twice by a high-speed crusher to obtain the first mixed material;

[0034](2) Get 200g of the first mixed material and loosely pack it into a molybdenum crucible, quickly move the molybdenum crucible filled with the first mixed material into the graphite carbon box of the sintering furnace, close the sintering furnace door, vacuumize, pour in argon, and again Vacuumize, repeat the operation three times to replace the gas in the sinteri...

Embodiment 2

[0039] This embodiment provides a method for preparing a nitride red fluorescent powder, the structural formula of which is Sr 0.92 Ca 0.08 Eu 0.02 AlSiN 3 , including the following steps:

[0040] (1) Accurately weigh 121.76g Sr 3 N 2 , 4.047g Ca 3 N 2 , 63.829g Si 3 N 4 , 5.705g EuF 3 , 55.953g AlN, mixed evenly under the protective atmosphere of argon in the glove box, mixed the mixed materials with a high-speed crusher for 5 minutes, poured out the crusher and passed through a 150-mesh nylon sieve, and then used the high-speed crusher to mix twice, obtaining the first mixed material;

[0041] (2) Get 200g of the first mixed material and loosely pack it into a molybdenum crucible, quickly move the molybdenum crucible filled with the first mixed material into the graphite carbon box of the sintering furnace, close the sintering furnace door, vacuumize, pour in argon, and again Vacuumize, repeat the operation three times to replace the gas in the sintering furnace;...

Embodiment 3

[0046] This embodiment provides a method for preparing a nitride red fluorescent powder, the structural formula of which is Sr 0.92 Ca 0.055 Eu 0.025 AlSiN 3 , including the following steps:

[0047] (1) Accurately weigh 121.391g Sr 3 N 2 , 3.699 g Ca 3 N 2 , 63.635g Si 3 N 4 , 7.109 g EuF 3 , 55.782g AlN, mixed evenly under the protective atmosphere of argon in the glove box, mixed the mixed materials with a high-speed crusher for 5 minutes, poured out the crusher and passed through a 150-mesh nylon sieve, and then used the high-speed crusher to mix twice, obtaining the first mixed material;

[0048] (2) Get 200g of the first mixed material and loosely pack it into a molybdenum crucible, quickly move the molybdenum crucible filled with the first mixed material into the graphite carbon box of the sintering furnace, close the sintering furnace door, vacuumize, pour in argon, and again Vacuumize, repeat the operation three times to replace the gas in the sintering fur...

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
diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses large-particle high-brightness nitride red fluorescent powder. The chemical structural formula of the large-particle high-brightness nitride red fluorescent powder is M<1-x>AlSiN3: xR, wherein M is one or more than two of Ca, Sr and Ba; R is one or any mixture of more than two of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and Eu is an essential element; and in the formula, 0.001 < = x < = 1. The invention further discloses a preparation method and application of the large-particle high-brightness nitride red fluorescent powder. The M<1-x>AlSiN3: xR luminescent material is synthesized by adopting a secondary sintering method, so that on the premise of improving the luminescent property of the luminescent material, the reaction sintering time is greatly shortened, and the energy consumption and the cost are reduced. The nitride red fluorescent powder with high brightness, regular morphology and large particles can be prepared, and the nitride red fluorescent powder is suitable for high-power LED packaging devices.

Description

technical field [0001] The invention relates to the field of inorganic luminescent materials, in particular to a large-grain high-brightness nitride red fluorescent powder and a preparation method and application thereof. Background technique [0002] Phosphor powder is widely used in fields such as flat panel displays, field emission displays, cathode ray tubes, and light emitting diodes (Light Emitting Diode, referred to as LEDs). Among them, LEDs have attracted extensive attention due to their advantages of high efficiency, energy saving, green environmental protection, simple structure, and strong designability, and are known as the green lighting source of the 21st century. [0003] So far, there are two mainstream schemes for using LEDs to obtain white light: one is to coat the surface of blue LEDs with yellow phosphor (Y 3 Al 5 o 12 : Ce 3+ ) way; the other is to combine ultraviolet LEDs chips with red, green and blue three primary color phosphors to obtain white ...

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): C09K11/64H01L33/50
CPCC09K11/0883C09K11/77347C09K11/77927H01L33/502
Inventor 王乖强豆帆颜俊雄朱洪维姜涛涛周小平刘海燕
Owner 烟台希尔德材料科技有限公司
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