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Method for preparing SrHfO3:Ce super-microsphere luminescent powder by adopting monohydric alcohol thermal method

A technology of luminescent powder and monohydric alcohol, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of uneven grain size distribution, difficult control of powder shape, uneven doping of activators, etc., and achieve the goal of preparing The effect of short cycle, wide application value and controllable process

Inactive Publication Date: 2015-04-01
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Co-precipitation method, due to the different conditions for the complete precipitation of various ions, it is difficult to precipitate at the same time, and it is easy to cause uneven doping of the activator
The powder prepared by combustion method has uneven grain size distribution
The morphology of powder obtained from sol-gel is not easy to control

Method used

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  • Method for preparing SrHfO3:Ce super-microsphere luminescent powder by adopting monohydric alcohol thermal method
  • Method for preparing SrHfO3:Ce super-microsphere luminescent powder by adopting monohydric alcohol thermal method
  • Method for preparing SrHfO3:Ce super-microsphere luminescent powder by adopting monohydric alcohol thermal method

Examples

Experimental program
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Effect test

Embodiment 1

[0020] According to the preparation process, the Sr(NO 3 ) 2 and HfOCl 2 8H 2 O was dissolved in 10ml of deionized water, stirred with a magnetic stirrer, and then 0.3mol% Ce(NO 3 ) 3 , under the situation of constant stirring, add 20ml absolute ethanol, namely solvent V (C 2 h 5 OH):V(H 2 O) is 2:1, add mineralizer KOH, adjust the pH value to 13.5, the solution becomes turbid, stir for a period of time, put it into a 50ml reaction kettle, the filling degree is 70%-80%, adjust the temperature at 140°C and keep it for 4 hours A white precipitate was obtained, which was filtered, washed several times with absolute ethanol, and then dried in a vacuum oven at 80°C for 24 hours to obtain a white powder, which was ground and sieved to obtain a sample. XRD analysis was carried out on samples obtained under different hydrothermal temperatures and different holding times. SEM analysis is carried out on the morphology of the obtained samples, and the powder morphology and partic...

Embodiment 2

[0022] Change the solvent volume content so that V(C 2 h 5 OH):V(H 2 O) is 3:1, that is, Sr(NO 3 ) 2 and HfOCl 2 8H 2 O is dissolved in the deionized water of 7.5ml, and other conditions are as embodiment 1, and the appearance of gained powder is as follows figure 2 As shown, the powder is nearly spherical, the agglomeration is not obvious, the particle size distribution is relatively uniform, and the particle size is reduced to about 1.0 μm.

Embodiment 3

[0024] Change the reaction solvent volume content V(C 2 h 5 OH):V(H 2 O) is 4:1, that is, Sr(NO 3 ) 2 and HfOCl 2 8H 2 O is dissolved in the deionized water of 6ml, other conditions are as embodiment 1, and the appearance of gained powder is as follows image 3 As shown, the powder morphology is uniform spherical, good dispersion, no agglomeration phenomenon, and the particle size is about 800nm.

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Abstract

The invention discloses a method for preparing SrHfO3:Ce super-microsphere luminescent powder by adopting a monohydric alcohol thermal method and relates to a method for preparing luminescent powder. The method is characterized in that high-purity Sr(NO3)2, HfOCl2.8H2O, Ce(NO3)3.6H2O are used as raw materials, KOH is used as a mineralizing agent, and alcohol / water mixed solution is used as a reaction solvent; the correlated conditions of the preparation process comprise: preparation of materials, adding and mixing of the mineralizing agent, hydrothermal reaction, filtering, washing and drying, wherein the content of Ce in the SrHfO3:Ce uminescent powder is between 0.1mol% and 1.5mol%. The method for preparing the SrHfO3:Ce uminescent powder is simple in process, and good in appearance and particle diameter controllability of the super-microsphere particles. Besides, the super-microsphere powder prepared by the method is an important raw material of a ceramic scintillator substrate material and can be burnt into sparkling transparent ceramic with excellent optical performances.

Description

technical field [0001] The invention relates to a method for preparing luminescent powder, in particular to a method for preparing SrHfO by monoalcohol thermal method 3 : The method of Ce ultramicrosphere luminescent powder. Background technique [0002] With the continuous development of modern nuclear electronics, detection technology and imaging technology, the application range of scintillators is expanding day by day. SrHfO 3 It has excellent characteristics such as strong X-ray stopping ability, fast attenuation, high light output and good energy resolution, and is one of the most promising scintillator matrix materials for fast response detectors. It has broad application prospects in nuclear medicine (X-CT, PET, etc.), high-energy physics, material non-destructive testing, safety inspection, geological exploration and other fields. However, studies at home and abroad have shown that how to fire it into transparent ceramics is still a difficult problem. Therefore,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/67
Inventor 马伟民李晓龙孙杨史树君韩锋
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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