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

A technology of long afterglow luminescence and luminescent materials, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of short afterglow time and discomfort in radar oscilloscopes

Inactive Publication Date: 2012-04-11
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • 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

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  • 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] Example 1: x = 0.0015; n = 3; M is Ce 3+ Time,

[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, and then put it into a tube furnace, under a high-purity nitrogen atmosphere (100 %N 2 ) Pear roast. Pre-fire at 200°C for 2 hours, burn at 700°C for 8 hours, cool under a nitrogen atmosphere, and take out the white long afterglow phosphor powder that is ground and ground. The obtained long afterglow phosphor produces purple long afterglow after cathode ray or X-ray irradiation, the wavelength range is 300 nm to 450 nm, and the afterglow time is 11 seconds.

Embodiment 2

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

[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, and then put it into a tube furnace, under a high-purity nitrogen atmosphere (100 %N 2 ) Pear roast. Pre-fire at 250°C for 2 hours, burn at 750°C for 9 hours, cool under a nitrogen atmosphere, and take out the long afterglow phosphor with white color after being ground. The obtained long afterglow phosphor produces blue-red long afterglow after cathode ray or X-ray irradiation, with a wavelength range of 450 nm to 660 nm, and a afterglow time of 61 seconds.

Embodiment 3

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

[0035] Weigh 0.5810g ​​KF, 4.3748g YF according to the stoichiometric ratio 3 And 0.003g NdF 3 , The weighed raw materials are fully ground and mixed evenly and placed in a high-purity corundum crucible or platinum crucible, placed in an oven at 100 ℃ for 12 hours, and then placed in a tube furnace, under a high-purity nitrogen atmosphere (100 %N 2 ) Pear roast. Pre-fire at 300°C for 2 hours, burn at 800°C for 10 hours, cool under a nitrogen atmosphere, and take out the white long afterglow phosphor powder that is ground and ground. The obtained long afterglow phosphor produces blue long afterglow after cathode ray or X-ray irradiation, the wavelength range is from 350nm to 500nm, and the afterglow time is 51 seconds.

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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 invention relates to a long afterglow luminescent material and a preparation method thereof, in particular to a material with long afterglow luminescence after being irradiated by a cathode ray or X-ray and a preparation method thereof. Background technique [0002] The radar concept 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 transmits and receives microwave band electromagnetic waves to search and detect targets. The information carrier of the radar is radio waves, which have a certain penetration ability. The radar is used to detect long-distance targets, and 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 detectio...

Claims

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Application Information

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Patent Type & Authority Patents(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