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

Cathode ray or X ray inspired long-lasting phosphor and preparing method thereof

A technology of long afterglow luminescence and cathode ray, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., and can solve problems such as unsuitable radar oscilloscopes and short afterglow time

Inactive Publication Date: 2009-10-07
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The long afterglow materials currently used are mainly zinc sulfate materials activated by Ag and Cu or transition group ions Mn 2+ Activated silicate and fluoride material systems, their afterglow time is short, usually 150 milliseconds to 1 second, not suitable for the requirements of radar oscilloscopes

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
  • Cathode ray or X ray inspired long-lasting phosphor and preparing method thereof
  • Cathode ray or X ray inspired long-lasting phosphor and preparing method thereof
  • Cathode ray or X ray inspired long-lasting phosphor and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: x=0.0015; n=3; M is Ce 3+ hour,

[0031] Weigh 0.5810g ​​KF, 4.3748g YF according to the stoichiometric ratio 3 and 0.0029g CeF 3 , fully grind and mix the weighed raw materials into a high-purity corundum crucible or platinum crucible, place in an oven, bake at 80°C for 12 hours, then put them into a tube furnace, and place them in a high-purity nitrogen protective atmosphere (100 % N 2 ) to burn. Pre-fire at 200°C for 2 hours, bake at 700°C for 8 hours, cool under nitrogen protection atmosphere, take out and grind to obtain white long-lasting phosphor. The obtained long afterglow phosphor produces purple long afterglow after cathode ray or X-ray irradiation, the wavelength range is 300nm-450nm, and the afterglow time is 11 seconds.

Embodiment 2

[0032] Embodiment 2: x=0.0015; r=3; M is Pr 3+ hour,

[0033] Weigh 0.5810g ​​KF, 4.3748g YF according to the stoichiometric ratio 3 and 0.0029g PrF 3 , fully grind and mix the weighed raw materials into a high-purity corundum crucible or platinum crucible, place in an oven, bake at 90°C for 12 hours, then put them into a tube furnace, and place them in a high-purity nitrogen protective atmosphere (100 % N 2 ) to burn. Pre-fire at 250°C for 2 hours, bake at 750°C for 9 hours, cool under nitrogen protection atmosphere, take out and grind to obtain white long-lasting phosphor. The obtained long afterglow phosphor produces blue-red long afterglow after being irradiated by cathode rays or X-rays, the wavelength range is 450nm-660nm, and the afterglow time is 61 seconds.

Embodiment 3

[0034] Embodiment 3: x=0.0015; n=3; M is Nd 3+ hour,

[0035] Weigh 0.5810g ​​KF, 4.3748g YF according to the stoichiometric ratio 3 and 0.003g NdF 3 , fully grind and mix the weighed raw materials into a high-purity corundum crucible or platinum crucible, place it in an oven, bake at 100°C for 12 hours, then put it into a tube furnace, and place it in a high-purity nitrogen protective atmosphere (100 % N 2 ) to burn. Pre-fire at 300°C for 2 hours, bake at 800°C for 10 hours, cool under nitrogen protection atmosphere, take out and grind to obtain white long-lasting phosphor. The obtained long afterglow phosphor produces blue long afterglow after being irradiated by cathode rays or X-rays, the wavelength range is 350nm-500nm, and the afterglow time is 51 seconds.

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 present invention relates to a cathode ray or X ray inspired long-lasting phosphor with a chemical formula of KF-(3-x)YF3-xMFn, wherein 0.0015< / =x< / =1.5; n=2 or 3. M is at least one component selected from rare earth ion. The preparing method comprises the following steps: weighting potassium fluoride, yttrium fluoride and trivalent rare earth fluoride according to a stoichiomtric ratio of material composition, after mixing to uniform, placing the mixture into a crucible, baking in a temperature of 80 DEG C to 100 DEG C for 12 hours, roasting in high-purity nitrogen gas or nitrogen-hydrogen protection atmosphere; pre-baking the mixture in the temperature of 200 DEG C to 300 DEG C for 2 hours, baking in the temperature of 700 DEG C to 800 DEG C for 8-10 hours, cooling in the nitrogen protection atmosphere, taking out and grinding. The long-lasting phosphor of the invention has the afterglows with different colors after irradiated by the cathode ray tube and X ray. The attenuation time of afterflow is longer than 1 second. The cathode ray or X ray inspired long-lasting phosphor according to the invention can be coated on a radar display for displaying the speed, direction and distance of target.

Description

technical field [0001] The present invention relates to a long afterglow luminescence material and its preparation method, in particular to a long afterglow luminescence material and its preparation method after being irradiated by cathode rays or X-rays. Background technique [0002] The concept of radar was formed in the early 20th century. Radar is the transliteration of English radar, which means radio detection and ranging. It is an electronic device that uses electromagnetic waves in the microwave band to search and detect targets. The information carrier of radar is radio wave, which has a certain penetrating ability. The application of radar to detect long-distance targets is not affected by the time conditions of day and night and atmospheric conditions such as rain, fog and clouds. Therefore, it can not only detect aircraft, ships, missiles and other military targets in the military, but also be widely used in weather forecasting, resource detection, environmental...

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): C09K11/85
Inventor 张家骅张金苏张霞
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI