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

A kind of phosphate fluorescent powder and its preparation method and application

A phosphor and phosphate technology, applied in the field of phosphate phosphor and its preparation, can solve the problems of reduced luminous efficiency of phosphors, reduced luminous intensity of substances, quenching of phosphor concentration, etc., and achieves excellent anti-quenching performance, The preparation method is simple and the effect of meeting the lighting requirements

Active Publication Date: 2022-01-25
GUANGDONG UNIV OF TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most widely used yellow phosphors are aluminate Y 3 Al 5 o 12 : Ce 3+ Phosphor powder, oxynitride (α-SiAlON: Eu 2+ , α-CaSiAlON:Eu 2+ ) Phosphor powder, etc. This kind of yellow phosphor mainly causes the phosphor to emit light by doping a small amount of rare earth elements into the matrix. However, the doping concentration of its active ions is often low, and heavy doping will lead to a concentration Quenching, resulting in a substantial reduction in the luminous intensity of the substance or even no luminescence
In addition, ordinary commercial phosphors tend to be saturated at high excitation densities, and part of the absorbed energy will be converted into heat and cause heat generation, which will eventually lead to a decrease in the luminous efficiency of the phosphors.

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
  • A kind of phosphate fluorescent powder and its preparation method and application
  • A kind of phosphate fluorescent powder and its preparation method and application
  • A kind of phosphate fluorescent powder and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A phosphate phosphor with the chemical formula Eu 3 PO 7 , its preparation method is as follows:

[0042] Weigh Eu 2 o 3 and NH 4 h 2 PO 4Grind and mix with a mortar, the molar ratio of the two is 3:2, and grind to obtain a mixture; sinter the above mixture at 1250°C for 6h to obtain Eu 3 PO 7 Phosphor.

[0043] For the prepared Eu 3 PO 7 Phosphate fluorescent powder is used for X-ray diffraction detection, excitation spectrum detection and emission spectrum detection. The X-ray diffraction detection adopts Beijing Puyi XD-2 X-ray diffractometer, and the excitation spectrum detection and emission spectrum detection adopt Edinburgh FLS-980 fluorescence spectrometer. Test results such as Figure 1~4 shown.

[0044] figure 1 Eu of Example 1 3 PO 7 X-ray diffraction pattern of phosphor powder, figure 1 shows no obvious impurity peaks, indicating that the product Eu 3 PO 7 The phase purity is high.

[0045] figure 2 is the Eu of Example 1 3 PO 7 The ex...

Embodiment 2

[0049] A phosphate phosphor with the chemical formula Dy 3 PO 7 , its preparation method is as follows:

[0050] Weigh Dy respectively 2 o 3 and NH 4 h 2 PO 4 Grind and mix with a mortar, the molar ratio of the two is 3:2, and grind to obtain a mixture; sinter the above mixture at 1250°C for 6h to obtain Dy 3 PO 7 Phosphor.

[0051] For the prepared Dy 3 PO 7 Phosphate fluorescent powder is used for excitation spectrum detection and emission spectrum detection, and the detection results are as follows: Figure 5~6 shown.

[0052] Figure 5 is the Dy of Example 2 3 PO 7 The excitation spectrum obtained by the fluorescent powder under the detection of the wavelength of 490nm, such as Figure 5 As shown, there is an obvious excitation peak in the wavelength range of 320~370nm, indicating that the phosphor can be excited by ultraviolet light.

[0053] Figure 6 is the Dy of Example 2 3 PO 7 The emission spectrum obtained by exciting the phosphor at a wavelength ...

Embodiment 3

[0055] A kind of phosphate phosphor, chemical formula is Tb 3 PO 7 , its preparation method is as follows:

[0056] Weigh Tb respectively 4 o 7 and NH 4 h 2 PO 4 Grind and mix with a mortar, the molar ratio of the two is 3:4, and grind to obtain a mixture; sinter the above mixture at 1250°C for 6h to obtain Tb 3 PO 7 Phosphor.

[0057] For the prepared Tb 3 PO 7 Phosphate fluorescent powder is used for excitation spectrum detection and emission spectrum detection, and the detection results are as follows: Figure 7~8 shown.

[0058] Figure 7 is Tb of Example 3 3 PO 7 The excitation spectrum obtained by the fluorescent powder under the detection of the wavelength of 511nm, such as Figure 7 As shown, there is an obvious excitation peak in the wavelength range of 340~360nm, indicating that the phosphor can be excited by ultraviolet light.

[0059] Figure 8 is Tb of Example 3 3 PO 7 The emission spectrum obtained by exciting the phosphor at a wavelength of 35...

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
wavelengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a phosphate fluorescent powder, a preparation method and application thereof. The chemical formula of the phosphate phosphor is Re 3 PO 7 , where Re is a rare earth element. The phosphate fluorescent powder of the present invention exists in the form of matrix luminescence, and is prepared by a high-temperature solid-phase method according to different molar ratios of phosphate compound and rare earth element compound, and its rare earth element content is as high as 75% to 78%, which overcomes the phosphor powder Defects with low concentration of activated ions, and the quantum saturation absorption rate can reach 95%, with excellent anti-quenching performance and high quantum saturation absorption rate. The preparation method of the present invention is simple, has good repeatability, and is beneficial to industrial production. The prepared phosphate phosphor can be excited in the range from ultraviolet light to visible light, and the matrix can emit blue / blue-green / red light, and the chemical properties are stable. With high luminous intensity, it can be widely used in the fields of laser lighting and LED lighting.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a phosphate fluorescent powder and a preparation method and application thereof. Background technique [0002] Lighting technology is crucial to the development of human beings. Compared with LED lighting technology, laser lighting has a smaller light-emitting area, higher luminous efficiency, easier sensory focus and longer irradiation distance. It can be widely used in car headlights and other Special fields, such as projectors, digital cinemas, TVs, stage lights, large-screen splicing, etc. It can be seen that laser lighting technology has broader application prospects and will become a development trend of the future display industry. At present, the easiest and cheapest way to realize laser lighting is to use blue light to excite yellow phosphor powder to realize white light illumination. Yellow phosphor powder is the key part of converting blue light laser int...

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): C09K11/81H01L33/50
CPCH01L33/502C09K11/7709C09K11/7737C09K11/7752
Inventor 康茹李杨冯一张绍安
Owner GUANGDONG 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