Unlock instant, AI-driven research and patent intelligence for your innovation.

Novel Yb<2+> doped long-lasting phosphor material and preparation method thereof

A long afterglow luminescence, yb2o3 technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of limited market application, high production cost, poor stability, etc., and achieve the effect of long afterglow time, good application value and cost reduction

Active Publication Date: 2013-10-02
HEBEI UNIVERSITY
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The long afterglow luminescent materials studied earlier are mainly sulfides, which have the disadvantages of easy hydrolysis, poor stability, and unsatisfactory luminous intensity and afterglow performance.
Since the late 1960s, long afterglow luminescent materials of alkaline earth metal aluminate system activated by rare earth ions with Eu2+ as the luminescent center have been widely studied. The time is acceptable, it does not contain radioactive elements, it is safe and reliable, but due to its high production cost, the market application of this type of material is limited

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
  • Novel Yb&lt;2+&gt; doped long-lasting phosphor material and preparation method thereof
  • Novel Yb&lt;2+&gt; doped long-lasting phosphor material and preparation method thereof
  • Novel Yb&lt;2+&gt; doped long-lasting phosphor material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In this example, a long-lasting luminescent material represented by formula (I) is prepared, wherein M=Ba, a=0.005, b=0, and the chemical formula is Ba 0.995 Al 2 o 4 :0.005Yb 2+ .

[0027] In order to obtain 0.01mol target product, according to Ba 0.995 Al 2 o 4 :0.005Yb 2+ The stoichiometric ratio of the three elements Ba, Al and Yb in the chemical formula is 0.995:2:0.005, respectively weigh 1.96015g (0.00995mol) BaCO 3 , 1.02g (0.01mol) Al 2 o 3 and 0.00985g (0.000025mol) Yb 2 o 3 Constitute the raw materials; then put the raw materials into the ball mill tank, and add an appropriate amount of absolute ethanol to the raw materials for ball milling and mixing, adjust the speed of the ball milling tank to 200r / min, and set the ball milling time to 6h; after the ball milling is evenly mixed, move the raw materials into Place the watch glass in a hot air disinfection box at 70°C to dry for 3 hours. After drying, take out the raw material and grind it into pow...

Embodiment 2

[0031] This example prepares the long-lasting luminescent material shown in formula (I), wherein M=Sr, a=0.005, b=0, and the chemical formula is Sr 0.995 Al 2 o 4 :0.005Yb 2+ .

[0032] In order to obtain 0.01mol target product, according to Sr 0.995 Al 2 o 4 :0.005Yb 2+ The stoichiometric ratio of the three elements of Sr, Al and Yb in the chemical formula is 0.995:2:0.005, and 1.46265g (0.00995mol) of SrCO is weighed respectively 3 , 1.02g (0.01mol) Al 2 o 3 and 0.00985g (0.000025mol) Yb 2 o 3 Constitute the raw materials; then put the raw materials into the ball mill tank, and add an appropriate amount of absolute ethanol to the raw materials for ball milling and mixing, adjust the speed of the ball milling tank to 200r / min, and set the ball milling time to 6h; after the ball milling is evenly mixed, move the raw materials into Place the watch glass in a hot air disinfection box at 70°C to dry for 3 hours. After drying, take out the raw material and grind it into...

Embodiment 3

[0034] Embodiment 3 (comparative embodiment)

[0035] This example prepares Eu-doped aluminate-based long-lasting luminescent material, the chemical formula is Sr 0.995 Al 2 o 4 :0.005Eu 2+ .

[0036] In order to obtain 0.01mol target product, according to Sr 0.995 Al 2 o 4 :0.005Eu 2+ The stoichiometric ratio of the three elements of Sr, Al and Eu in the chemical formula is 0.995:2:0.005, and 1.46265g (0.00995mol) of SrCO is weighed respectively 3 , 1.02g (0.01mol) Al 2 o 3 and 0.0088g (0.000025mol) Eu 2 o 3 Constitute the raw materials; then put the raw materials into the ball mill tank, and add an appropriate amount of absolute ethanol to the raw materials for ball milling and mixing, adjust the speed of the ball milling tank to 200r / min, and set the ball milling time to 6h; after the ball milling is evenly mixed, move the raw materials into Place the watch glass in a hot air disinfection box at 70°C to dry for 3 hours. After drying, take out the raw material an...

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
emission peakaaaaaaaaaa
Login to View More

Abstract

The invention provides a novel Yb<2+> doped long-lasting phosphor material and a preparation method thereof. The long-lasting phosphor material has the chemical general formula as follows: M(1-a-b)Al2O4:aYb<2+>, bDy<3+>, wherein M is one of Ca, Sr and Ba; 0.001<=a<=0.01, and 0<=b<=0.01. The novel long-lasting phosphor material provided by the invention takes Yb<2+> as a luminous center and not only is used for realizing the diversity of the long-lasting phosphor material selected by people, but also has longer afterglow time as comparison with an aluminate-based long-lasting phosphor material with Eu<2+> as the luminous center; meanwhile, the adopted raw material Yb2O3 is cheaper in price, and the cost of the long-lasting phosphor material can be effectively reduced, so that the long-lasting phosphor material has a higher application value.

Description

technical field [0001] The invention relates to a long afterglow luminescent material, specifically a Yb 2+ Doped novel long-lasting luminescent material and its preparation method. Background technique [0002] Long afterglow luminescent material has unique energy storage and luminescence characteristics. The material can store energy after being illuminated, and then release it slowly, and can continue to emit light for a long time. It is a pollution-free cold light source, which can be used in night vision or It acts as an indicator and a sign under no lighting conditions. [0003] As people pay more and more attention to environmental protection and energy saving, the application fields of long afterglow luminescent materials are also expanding, and are widely used in emergency displays, traffic signs, luminous watches, fabric printing and other fields. Driveway paint (transportation); it also has great application prospects in the fields of safety signs, anti-counterf...

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): C09K11/64
Inventor 杨艳民苏献园焦福运李自强李志强
Owner HEBEI UNIVERSITY