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Method for reducing Eu-doped strontium aluminate luminous material through bombardment of electronic beams

A technology of electron beam bombardment and luminous materials, applied in the field of materials, can solve the problems of inflammable, explosive, toxic and harmful, large energy consumption, etc., and achieve the effect of reducing energy consumption, saving energy and saving time

Active Publication Date: 2013-06-26
响水县东源橡塑制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] All of the above methods require long-term heat treatment at a high temperature of about 1300°C to obtain a good reduction effect, which not only consumes a lot of energy, but also uses or produces toxic, harmful, flammable and explosive gases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Step (1) put the Eu-doped strontium aluminate material to be reduced into a heat treatment furnace for sintering, sintering at 1200° C. for 1 hour, and cooling naturally.

[0017] Step (2) putting the sintered Eu-doped strontium aluminate material into the vacuum chamber where the electron gun is located.

[0018] Step (3) vacuumize the vacuum chamber so that the pressure of the vacuum chamber is 5×10 -2 Pa.

[0019] Step (4) Turn on the electron gun, and the electron beam sent by the electron gun hits the Eu-doped strontium aluminate material to be reduced; the energy of the electron beam is 5KeV, and the electron beam current density is 50mA / cm 2 .

[0020] Step (5) Use a fiber optic spectrometer to detect the Eu-doped strontium aluminate to be reduced through the observation window. When it is detected that the Eu-doped strontium aluminate to be reduced emits green light with a peak wavelength of 526nm, turn off the electron gun, and take out the Eu-doped strontium...

Embodiment 2

[0022] Step (1) put the Eu-doped strontium aluminate material to be reduced into a heat treatment furnace for sintering, sintering at 1300° C. for 0.5 hour, and cooling naturally.

[0023] Step (2) putting the sintered Eu-doped strontium aluminate material into the vacuum chamber where the electron gun is located.

[0024] Step (3) vacuumize the vacuum chamber so that the pressure of the vacuum chamber is 10 -1 Pa.

[0025] Step (4) Turn on the electron gun, and the electron beam sent by the electron gun hits the Eu-doped strontium aluminate material to be reduced; the energy of the electron beam is 1KeV, and the electron beam current density is 100mA / cm 2 .

[0026] Step (5) Use a fiber optic spectrometer to detect the Eu-doped strontium aluminate to be reduced through the observation window. When it is detected that the Eu-doped strontium aluminate to be reduced emits green light with a peak wavelength of 526nm, turn off the electron gun, and take out the Eu-doped strontiu...

Embodiment 3

[0028] Step (1) Put the Eu-doped strontium aluminate material to be reduced into a heat treatment furnace for sintering, sintering at 1000° C. for 5 hours, and cooling naturally.

[0029] Step (2) putting the sintered Eu-doped strontium aluminate material into the vacuum chamber where the electron gun is located.

[0030] Step (3) vacuumize the vacuum chamber so that the pressure of the vacuum chamber is 8×10 -2 Pa.

[0031] Step (4) Turn on the electron gun, and the electron beam sent by the electron gun hits the Eu-doped strontium aluminate material to be reduced; the energy of the electron beam is 10KeV, and the electron beam current density is 10mA / cm 2 .

[0032] Step (5) Use a fiber optic spectrometer to detect the Eu-doped strontium aluminate to be reduced through the observation window. When it is detected that the Eu-doped strontium aluminate to be reduced emits green light with a peak wavelength of 526nm, turn off the electron gun, and take out the Eu-doped stronti...

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Abstract

The invention relates to a method for reducing a Eu-doped strontium aluminate luminous material through the bombardment of electronic beams. In the conventional reduction method, energy consumption is high, and toxic and harmful gas is used or generated. The method comprises the following steps of: sintering a Eu-doped strontium aluminate material to be reduced, putting the sintered Eu-doped strontium aluminate material into a vacuum chamber, vacuumizing the vacuum chamber to ensure that the pressure in the vacuum chamber is less than or equal to 10<-1>Pa, starting an electron gun to make electronic beams emitted by the electron gun bombard on the Eu-doped strontium aluminate material to be reduced, detecting the Eu-doped strontium aluminate to be reduced through an observation window by a fiber spectrometer, closing the electron gun when the Eu-doped strontium aluminate to be reduced emits green light with the peak wavelength of 526nm, and taking Eu-doped strontium aluminate out, wherein the Eu-doped strontium aluminate is a reduced Eu-doped strontium aluminate luminous material. By the method, energy consumption can be greatly reduced, the time can be saved, gas or auxiliary materials are not required, and the requirements of energy conservation and low carbon emission of material processing and treatment are met.

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to a method for reducing Eu-doped strontium aluminate luminous materials by electron beam bombardment, which can be widely used in various night signs, warning devices and other occasions. Background technique [0002] Eu-doped strontium aluminate is a long afterglow luminous material. After being illuminated, it can continuously release high-brightness afterglow at night or in dark places, and the afterglow time can be as long as more than 10 hours. However, most of Eu in strontium aluminate materials obtained by common methods is Eu 3+ in the form of ions. In order to obtain a strontium aluminate luminous material with better luminescence performance, the Eu-doped strontium aluminate raw material must be reduced so that the Eu in it 3+ ion reduction to Eu 2+ ions, so as to obtain long-lasting and high-brightness luminescence. [0003] At present, the reduction of Eu-doped stro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80C09K11/64
Inventor 季振国吴家亮张尔攀席俊华
Owner 响水县东源橡塑制品有限公司