Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Ytterbium and thulium double-doped calcium tungstate polycrystalline powder blue upconversion material and preparation method thereof

A conversion material, calcium tungstate technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of single emitted light, difficult to obtain, and weak up-converted blue light intensity, and achieve simple preparation method, uniform luminescence, and high luminescence efficiency effect

Inactive Publication Date: 2011-09-14
HARBIN INST OF TECH
View PDF1 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of doping rare earth elements in the host material, which makes it difficult to obtain light with good uniformity, and the problem of doping Tm 3+ The intensity of the up-conversion blue light produced is weak, and a kind of ytterbium-thulium double-doped calcium tungstate polycrystalline powder blue-light up-conversion material and its preparation method are provided

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
  • Ytterbium and thulium double-doped calcium tungstate polycrystalline powder blue upconversion material and preparation method thereof
  • Ytterbium and thulium double-doped calcium tungstate polycrystalline powder blue upconversion material and preparation method thereof
  • Ytterbium and thulium double-doped calcium tungstate polycrystalline powder blue upconversion material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0017] Specific implementation mode 1: In this implementation mode, the chemical formula of the blue light up-conversion material is Ca 0.99-x WO 4 :Yb x / Tm 0.01 , where 0.01≤x≤0.08.

[0018] In this embodiment, the blue light up-conversion material of ytterbium-thulium double-doped calcium tungstate polycrystalline powder is doped with Yb 3+ and Tm 3+ CaWO 4 Polycrystalline powder.

specific Embodiment approach 2

[0019] Specific implementation mode 2: In this implementation mode, the chemical formula of the blue light up-conversion material is Ca 0.99-x WO 4 :Yb x / Tm 0.01 , where 0.03≤x≤0.06.

specific Embodiment approach 3

[0020] Specific embodiment three: In this embodiment, the chemical formula of the blue light up-conversion material is Ca 0.99-x WO 4 :Yb x / Tm 0.01 , where 0.04≤x≤0.05.

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 an ytterbium and thulium double-doped calcium tungstate polycrystalline powder blue upconversion material and a preparation method thereof, and relates to a rare earth element doped calcium tungstate polycrystalline powder blue upconversion material and a preparation method thereof. The problems that the emitted light with high oneness is difficult to obtain because rare earth elements are doped in a matrix material, and the intensity of upconversion blue light generated by doping Tm<3+> is low are solved. A chemical formula of the ytterbium and thulium double-doped calcium tungstate polycrystalline powder blue upconversion material is Ca0.99-xWO4:Ybx / Tm0.01, wherein x is more than or equal to 0.01 and is less than or equal to 0.08. The preparation method comprisesthe following steps of: 1, weighing according to the stoichiometric ratio of the chemical formula; 2, grinding and tabletting; and 3, sintering at high temperature. The ytterbium and thulium double-doped calcium tungstate polycrystalline powder blue upconversion material can emit bright upconversion blue light uniformly under the condition that the laser pumping length is 980nm and the exciting power is 300mW.

Description

technical field [0001] The invention relates to a rare earth element-doped calcium tungstate polycrystalline powder blue light up-conversion material and a preparation method thereof. Background technique [0002] Up-conversion luminescence, also known as anti-Stokes luminescence, refers to the phenomenon of converting two or more low-energy photons into one high-energy photon. Up-conversion luminescence materials need to be doped with rare earth elements in the matrix. Rare earth luminescent materials have strong energy absorption capacity and high conversion efficiency; they can emit a spectrum from ultraviolet light to infrared light, especially in the visible light region. The physical and chemical properties of rare earth elements are stable, and they can withstand the effects of high-power electron beams, high-energy rays and strong ultraviolet light. However, due to the complex energy level division of most rare earth elements, doping rare earth elements in the matrix...

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): C09K11/68
Inventor 徐衍岭王锐赵宏刘亮张春雨
Owner HARBIN INST OF TECH
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
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