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

Near-infrared-region mechanoluminescence fluorescent powder and preparation method thereof

A near-infrared region, luminescent technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems that luminescent phosphors have not been reported, and are limited to ultraviolet light, blue light, green light to red light, etc., to achieve the preparation process Simple, low cost, and easy for mass production

Active Publication Date: 2017-05-24
SOUTH CHINA UNIV OF TECH
View PDF2 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanoluminescence bands discovered so far are only limited to the visible light bands from ultraviolet light, blue light, green light to red light.
Near-infrared emitting mechanoluminescent phosphors have not been reported for a long time

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
  • Near-infrared-region mechanoluminescence fluorescent powder and preparation method thereof
  • Near-infrared-region mechanoluminescence fluorescent powder and preparation method thereof
  • Near-infrared-region mechanoluminescence fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Choose calcium carbonate, zinc sulfide, and neodymium oxide as raw materials, according to the molar ratio of each element Ca:Zn:S:Nd=1-x:1:1:x, respectively weigh three kinds of compound raw materials, a total of five groups, for example Down:

[0034] (1) Ca:Zn:S:Nd=0.999:1:1:0.001, corresponding to x=0.10%;

[0035] (2) Ca:Zn:S:Nd=0.998:1:1:0.002, corresponding to x=0.20%;

[0036] (3) Ca:Zn:S:Nd=0.997:1:1:0.003, corresponding to x=0.30%;

[0037] (4) Ca:Zn:S:Nd=0.995:1:1:0.005, corresponding to x=0.50%;

[0038] (5) Ca:Zn:S:Nd=0.990:1:1:0.010, corresponding to x=1.00%;

[0039] Control the total weight of the mixture to be 5g, grind 5g of mixed raw materials evenly, put them into a corundum crucible, then place the crucible in a corundum boat, push the corundum boat into a tube furnace, and roast at 1100°C for 3 hours under a nitrogen atmosphere. Cool naturally with the furnace to get a series of near-infrared mechanoluminescent phosphors with doping concentrati...

Embodiment 2

[0045] Select calcium oxide, zinc sulfide and neodymium nitrate as raw materials, weigh a certain amount of the above raw materials according to the molar ratio Ca:Zn:S:Nd=0.995:1:1:0.005, and after the raw materials are ground and mixed, take a part and add PVA Carry out granulation, take 5g of the raw material after granulation and carry out tabletting, adopt semi-automatic tabletting machine to keep 2min under 10Mpa, obtain the cylindrical flake of 25 * 10mm. The flakes were placed in a corundum boat and baked at 1100°C for 4 hours in a vacuum atmosphere; powder X-ray diffraction analysis showed that it was a CaZnOS crystal phase.

[0046] Calcined CaZnOS:0.5%Nd 3+ The sample is fixed on the sample stage, rubbed with a corundum rod with a sharp tip, and a spectrometer is used to collect the luminescent signal of the sample under friction excitation. Keep the distance between the rubbing tip and the fiber optic probe at 8mm. When performing triboluminescence experiments in...

Embodiment 3

[0048] Select calcium hydroxide, zinc sulfide, and neodymium hydroxide as raw materials, and weigh a certain amount of the above raw materials according to the molar ratio Ca:Zn:S:Nd=0.995:1:1:0.005. After the raw materials are ground and mixed, take an appropriate amount into a corundum crucible, then place the crucible in a corundum boat, push the corundum boat into a tube furnace, bake at 1000 ° C for 8 hours in an argon atmosphere, and cool naturally with the furnace. The obtained sample can be ground evenly to obtain near-infrared region mechanoluminescent phosphor CaZnOS:0.5%Nd 3+ . The obtained phosphor powder and transparent epoxy resin were mixed evenly at a mass ratio of 5:1, and cured at room temperature for 8 hours to obtain a cylindrical phosphor resin composite material with a size of 25×15 mm. The WEW-600 microcomputer-controlled universal testing machine was used to carry out the pressure luminescence test, and the pressure range was controlled from 0N to 5000...

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 near-infrared-region mechanoluminescence fluorescent powder of which the general formula is Ca(1-x)ZnOS:xNd<3+>, wherein 0.05%<=x<=1.0%. The invention also discloses a preparation method of the near-infrared-region mechanoluminescence fluorescent powder. The method comprises the following steps: (1) respectively weighing a calcium-containing compound, a sulfur-containing compound, a zinc-containing compound and a neodymium-containing compound according to the mol percents of the elements as raw materials; (2) uniformly grinding the raw materials in the step (1), and roasting in a protective atmosphere or in vacuum; and (3) taking out the roasted sample, and grinding to obtain the near-infrared-region mechanoluminescence fluorescent powder. The mechanoluminescence peak of the fluorescent powder under the action of friction force and pressure is in the 900-1400nm near-infrared spectral region; and the near-infrared luminescence can also be effectively excited by 500-550nm yellow light in the ultraviolet region, 600nm-around orange red light and 808nm laser.

Description

technical field [0001] The invention relates to luminescent materials, in particular to a near-infrared mechanoluminescent fluorescent powder and a preparation method thereof. Background technique [0002] Luminescence is a process in which an object absorbs energy in a certain way and converts it into non-equilibrium radiation. Luminescence can be excited in many ways, such as photoluminescence excited by ultraviolet light, cathodoluminescence excited by electron beams, and electric excitation. electroluminescence, thermally excited thermoluminescence, etc. However, there are relatively few studies on mechanoluminescence, that is, the luminescence phenomenon of materials under the action of mechanical external forces. With continuous exploration for more than 20 years, researchers have discovered and prepared a variety of phosphors with mechanoluminescent properties. It has the advantages of low cost, stable luminous performance, and proportional luminous intensity to the ...

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): C09K11/77
CPCC09K11/7756
Inventor 彭明营李乐京
Owner SOUTH CHINA 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