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Process fo preparing cerium doped lutetium pyrosilicate submicron imaging fluorescent screen

A technology of lutetium pyrosilicate and fluorescent screen, which is applied in the field of submicron imaging, can solve the problem of low light output of flashing ceramic fluorescent screens, and achieve the effects of high quality single crystal film, good optical properties, and high X-ray absorption coefficient

Inactive Publication Date: 2007-12-26
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcomings of the powder fluorescent screen, the light output of the flashing ceramic fluorescent screen is low, which cannot meet the needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: (Ce 0.005 Lu 0.995 ) 2 Si 2 o 7 / Lu 2 Si 2 o 7 flicker screen

[0022] According to the above-mentioned preparation process step at room temperature, the mixed solution is prepared, according to tetraethyl orthosilicate (TEOS): ethanol: deionized water is 1: 4: 8 (volume ratio); according to process step with Lutetium nitrate and cerium nitrate with a purity greater than 99.99% are raw materials, according to the chemical formula (Ce 0.005 Lu 0.995 ) 2 Si 2 o 7The stoichiometric ratio in the formula is calculated and the formula is dissolved in the mixed solution of tetraethyl orthosilicate (TEOS), ethanol and water, and appropriate HCl is added to adjust the properties of the solution. In the obtained solution, Ce: Lu: Si = 0.005: 0.995: 2; according to the above step , the solution was fully stirred with a magnetic stirrer for 24 hours, so that it was mixed evenly and fully hydrolyzed, and then sealed and aged for more than three days , th...

Embodiment 2

[0024] Embodiment 2: (Ce 0.005 Gd 0.3 Lu 0.695 ) 2 Si 2 o 7 / (Gd 0.3 Lu 0.7 ) 2 Si 2 o 7 flicker screen

[0025] According to the preparation process step in the above-mentioned embodiment 1, at room temperature, the mixed solution is prepared, according to ethyl orthosilicate: ethanol: deionized water is 1: 5: 10 (volume ratio); according to process step with Lutetium nitrate, gadolinium nitrate and cerium nitrate with a purity greater than 99.99% are used as raw materials, according to the chemical formula (Ce 0.005 Gd 0.3 Lu 0.695 ) 2 Si 2 o 7 The stoichiometric ratio in the formula is calculated and the formula is dissolved in the mixed solution of tetraethyl orthosilicate (TEOS), ethanol and water, and appropriate HCl is added to adjust the properties of the solution. In the obtained solution, Ce: Gd: Lu: Si = 0.005: 0.3: 0.695: 2; According to the above step , the solution was fully stirred with a magnetic stirrer for 20 hours, so that it was mixed ev...

Embodiment 3

[0026] Embodiment 3: (Ce 0.01 Y 0.1 Lu 0.89 ) 2 Si 2 o 7 / (Y 0.1 Lu 0.9 ) 2 Si 2 o 7 flicker screen

[0027] According to step in the above-mentioned embodiment 2 at room temperature, prepare mixed solution, by ethyl orthosilicate: ethanol: deionized water is 1: 3: 7 (volume ratio); Press process step with purity greater than 99.99% of lutetium nitrate, yttrium nitrate and cerium nitrate are raw materials, according to the chemical formula (Ce 0.01 Y 0.1 Lu 0.89 ) 2 Si 2 o 7 The stoichiometric ratio in the formula is calculated and the formula is dissolved in the mixed solution of tetraethyl orthosilicate (TEOS), ethanol and water, and appropriate HCl is added to adjust the properties of the solution. Ce: Y: Lu: Si = 0.01: 0.1: 0.89: 2 in the obtained solution; According to the above step , the solution was fully stirred with a magnetic stirrer for 24 hours, so that it was mixed evenly and fully hydrolyzed, and then sealed and left to stand After 3 days, a ...

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Abstract

The invention is a Ce-doped lutetium bisilicate submicron imaging fluorescent screen and its preparing method, and its characteristic: its structure expression is (CexMzReyLu1-x-y)2Si2O7 / (Lu1-yRe)Si2O7, adopting sol-gel process to grow a layer of (CexMzReyLu1-x-y)2Si2O7 on a (Lu1-yRe)Si2o7 substrate with a special direction of crystal face (000), (100) or (001) to make it, where 0.001<=x<=0.01 and 0 <=y<=0.3. As compared with the fluorescent screen by existing process, it has higher X-ray absorption coefficient and resolution; the adopted substrate fits flicker monocrystalline membrane whose quality is high, so the optical property of a screen is good. Therefore, a flicker fluorescent screen that adopts the invention can be widely applied to various microscopic X-ray imaging fields.

Description

technical field [0001] The present invention relates to submicron imaging, in particular to a method for preparing a cerium-doped lutetium disilicate submicron imaging phosphor screen, in particular to the use of a sol-gel (Sol-Gel) method on undoped lutetium disilicate single crystal ( Lu 1-y Re y ) 2 Si 2 o 7 A layer of doped trivalent cerium ions (Ce 3+ ) lutetium disilicate single crystal thin film (Ce x Re y Lu 1-x-y ) 2 Si 2 o 7 , (0.001≤x≤0.01, 0≤y≤0.3, where Re represents other rare earth elements except Lu, such as: Y, Gd, Sc, In, etc. or a mixture of multiples), thus preparing a product that can be used for X Phosphor screen for submicron imaging of rays (Ce x Re y Lu 1-x-y ) 2 Si 2 o 7 / (Lu 1-y Re y ) 2 Si 2 o 7 , (0.001≤x≤0.01, 0≤y≤0.3). Background technique [0002] Microscopic imaging technology has the advantages of sub-micron resolution, high detection efficiency, high degree of digitalization, and online real-time detection. It plays a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J9/20
Inventor 赵广军严成锋徐军庞辉勇介明印何晓明夏长泰
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI