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

Silicate red fluorescent powder and preparation method thereof

A technology of red fluorescent powder and silicate, which is applied in chemical instruments and methods, luminescent materials, sustainable buildings, etc., can solve the problems of affecting the use effect, reducing light efficiency, and difficulty in obtaining white light with high color rendering. Effects of reduction, optimization of crystal field, improvement of chemical stability

Active Publication Date: 2014-05-07
JIANGSU BREE OPTRONICS CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the silicate phosphors prepared in the above-mentioned publications can only achieve emission wavelengths less than 600nm, so although the phosphors are mixed with yellow-green phosphors, they can achieve high light efficiency and low color temperature (Tk≤4000K 》 Warm white light, but it is difficult to obtain white light with high color rendering
At the same time, the silicate phosphor in this system will be hydrolyzed when it encounters water, which will also reduce its light efficiency and affect the final 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
  • Silicate red fluorescent powder and preparation method thereof
  • Silicate red fluorescent powder and preparation method thereof
  • Silicate red fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh BaCO 3 13.16g, SrCO 3 134.15g, LiF0.2g, Si 3 N 4 13.09g, Eu 2 o 3 3.22g, CeO 2 0.57g, NH 4 F0.74g, mixed evenly and put into corundum crucible, in reducing atmosphere (N 2 and H 2 The volume ratio is 10:90), heated to 1364 ° C, and kept for 12 hours; the fired powder was crushed, sieved, washed with deionized water until neutral, dried, and finally vinyl three (β- Methoxyethoxy) silane for dry surface modification, the prepared composition is Sr 2.726 Ba 0.2 Li 0.023 Si 0.84 Ge 0.16 OF 0.083 :Eu 0.055 , Ce 0.01 Silicate red phosphor, its emission spectrum, excitation spectrum and X-ray diffraction spectrum are shown in figure 1 , figure 2 and Figure 4 . Depend on Figure 4 It can be seen from the color spectrum that the phosphor powder in Example 1 is pure in phase and has no impurity. The full spectrum of the positive white LED prepared by using this phosphor is shown in Figure 6 .

Embodiment 2

[0034] Weigh BaCO 3 9.21g, SrCO 3 137.79g, Si 3 N 4 15.43g, NaF0.168g, P 2 o 5 0.473g, Eu 2 o 3 4.34g, MnCO 3 0.3g, mixed evenly and put into corundum crucible, in reducing atmosphere (N 2 and H 2 The volume ratio is 20:80), heated to 1480°C, and kept warm for 6.5h; the fired powder was crushed, sieved, washed with deionized water until neutral, dried, and finally vinyl three (β -Methoxyethoxy)silane after dry surface modification, the prepared composition is Sr 2.8 Ba 0.14 Na 0.012 Si 0.99 P 0.01 o 4.96 f 0.012 :Eu 0.074 , Mn 0.0078 Silicate red phosphor, its emission spectrum see image 3 .

Embodiment 3

[0036] Weigh BaCO 3 13.16g, SrCO 3 130.65g, Si 3 N 4 13.87g, KF0.62g, P 2 o 5 2.6g, Eu 2 o 3 5.86g, Dy 2 o 3 0.8g, mixed evenly and put into corundum crucible, in reducing atmosphere (N 2 and H 2 The volume ratio is 40:60), heated to 1520°C, and kept for 6 hours; the fired powder was crushed, sieved, washed with deionized water until neutral, dried, and finally washed with 3-(2-ammonia After ethyl)-aminopropylmethyldimethoxysilane carries out dry method surface modification, the prepared composition is Sr 2.655 Ba 0.2 K 0.032 Si 0.89 P 0.11 o 5.3 f 0.04 :Eu 0.1 , Dy 0.013 Silicate red phosphor, its emission spectrum see image 3 .

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
luminous efficiencyaaaaaaaaaa
color rendering indexaaaaaaaaaa
Login to View More

Abstract

The invention relates to a silicate red fluorescent powder of which the chemical structural formula is Ba(3-a-b-d-k)SraA'bSi(1-c)A'cO(5-q)Fq:Eud,Mk, wherein A' is at least one of Li, Na and K; A' is one of Ge and P; M is at least one of Ce, Mn and Dy; and 0.01

Description

technical field [0001] The invention relates to a silicate red fluorescent powder and a preparation method thereof. Background technique [0002] White light-emitting diodes (referred to as white LEDs) have significant advantages over traditional light sources in terms of size, life, environmental protection, and energy saving. Therefore, they are expected to become the fourth-generation green lighting sources that replace compact energy-saving lamps. 3 al 5 o 12 : Ce 3+ (YAG:Ce) yellow light-emitting phosphor as a light conversion material to achieve white light technology has become the mainstream of white LED, and has increasingly attracted the attention of researchers all over the world. For example, US patents US5998925 and US6614179B1 adjusted and optimized the Y / Gd ratio, Al / Ga ratio, trace element doping and preparation methods. [0003] According to the latest technical reports, the luminous efficiency of white LEDs combined with blue LEDs and YAG phosphors 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 Patents(China)
IPC IPC(8): C09K11/66C09K11/73H01L33/50
CPCY02B20/181Y02B20/00
Inventor 梁超何锦华符义兵刘凯
Owner JIANGSU BREE OPTRONICS CO LTD
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