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Up-conversion fluorescent material and preparation method thereof

A technology of luminescent materials and compounds, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of few researches on conversion luminescent materials, low anti-laser damage threshold, poor chemical stability, etc., achieving low equipment requirements and reducing production. Cost, stable performance

Inactive Publication Date: 2012-07-25
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fluoride or oxyfluoride substrates have limited their practical applications due to their strong hygroscopicity, poor chemical stability, poor mechanical strength, low threshold of resistance to laser damage, poor thermal stability, and difficult preparation.
However, there are few studies on rare earth ion-doped niobate and tantalate upconversion luminescent materials

Method used

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  • Up-conversion fluorescent material and preparation method thereof
  • Up-conversion fluorescent material and preparation method thereof
  • Up-conversion fluorescent material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] According to the chemical formula La 0.995 Er 0.005 CaNb 3 o 10 The stoichiometric ratio of each element in the formula is weighed separately for calcium carbonate CaCO 3 : 0.1667 g, lanthanum oxide La 2 o 3 : 0.5403 g, erbium oxide Er 2 o 3 : 0.032 g, niobium oxide Nb 2 o 5 : 1.3291 g, ground in an agate mortar and mixed evenly, select the air atmosphere for the first pre-sintering, the temperature is 350 ° C, the pre-sintering time is 8 hours, then cool to room temperature, take out the sample. After the first pre-sintering, the mixture is fully mixed and ground evenly, and the second sintering is performed at 950°C in an air atmosphere. The sintering time is 8 hours, cooled to room temperature, and the sample is taken out. After the raw material is calcined for the second time, the mixture is fully mixed and ground evenly, and the final sintering is carried out at 1380°C in the air atmosphere for the third time. The sintering time is 6 hours, and the powder ...

Embodiment 2

[0037] According to the chemical formula Gd 0.95 Er 0.05 CaNb 3 o 10 The stoichiometric ratio of each element in the formula is weighed to take calcium hydroxide Ca(OH) 2 : 0.1234 g, gadolinium oxide Gd 2 o 3 : 0.574 g, erbium oxide Er 2 o 3 : 0.0319 g, niobium oxide Nb 2 o 5 : 1.3291 g, after grinding and mixing uniformly in an agate mortar, select the air atmosphere for the first calcination, the temperature is 400 ° C, the calcination time is 6 hours, then cool to room temperature, and take out the sample. After the first calcination of the raw materials, the mixture is fully mixed and ground again, and the second sintering is carried out at 1000°C in an air atmosphere. The sintering time is 7 hours, cooled to room temperature, and the sample is taken out. After the raw materials calcined for the second time, the mixture is fully mixed and ground evenly again, and then sintered for the third time at 1350°C in an air atmosphere. complex up-conversion phosphors.

...

Embodiment 3

[0040] According to chemical formula Y 0.8 Er 0.2 CaNb 3 o 10 The stoichiometric ratio of each element in the formula is weighed separately for calcium carbonate CaCO 3 : 0.1667 g, yttrium oxide Y 2 o 3 : 0.3011 g, erbium oxide Er 2 o 3 : 0.1275 g, niobium oxide Nb 2 o 5 : 1.3291 grams, ground in an agate mortar and mixed evenly, select the air atmosphere for the first calcining, the temperature is 950 ℃, the calcining time is 5 hours, then cool to room temperature, take out the sample. After the first calcination of the raw materials, the mixture is fully mixed and ground again, and the second sintering is performed at 1200°C in an air atmosphere. The sintering time is 5 hours, cooled to room temperature, and the sample is taken out. After the raw material is calcined for the second time, the mixture is fully mixed and ground again, and then sintered for the third time in an air atmosphere at 1500°C. The sintering time is 5 hours, and cooled to room temperature to ob...

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Abstract

The present invention relates to an up-conversion fluorescent material and a preparation method thereof. The molecular formula of the fluorescent material is R1-xErxCaM3O10, wherein R is at least one of La<3+>, Gd<3+> and Y<3+>, M is at least one of Nb<5+> and Ta<5+>, and x is the mole percentage of the doped Er<3+> and 0.00001<= x<=1.0. The preparation method comprises the following steps: weighing raw materials in proportions, mixing the materials evenly, performing first pre-burning at 300-950 DEG C, cooling, performing second sintering at 950-1300 DEG C, grinding the materials, performingfinal sintering the mixed raw materials at 1300-1500 DEG C, cooling and grinding the materials to obtain the up-conversion fluorescent material. The preparation method provided by the invention adopts a high-temperature solid-phase sintering method and is simple; and the obtained up-conversion fluorescent material has the advantages of steady properties, high brightness and high color purity of the green up-conversion light under an infrared laser pumping light source, and has good application prospects in the fields of up-conversion lasers, fiber amplifiers, three-dimensional display and anti-counterfeit.

Description

technical field [0001] The invention relates to a luminescent material, in particular to an up-conversion luminescent material and its preparation, and belongs to the technical field of inorganic luminescent materials. Background technique [0002] The characteristic of up-conversion materials is that the absorbed photon energy is lower than the emitted photon energy. This phenomenon violates Stokes' law, so it is also called anti-Stokes' law luminescent material. [0003] The most common up-conversion material is a fluorescent material that can emit visible light under the excitation of infrared light, that is, a material that converts infrared light into visible light. Light conversion, this characteristic is of great significance to the development of infrared detection technology. With the rapid development of information processing, high-density data storage, submarine communication, large-screen video display, detection and laser medical treatment, there is an increas...

Claims

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Application Information

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IPC IPC(8): C09K11/78C09K11/67
Inventor 黄彦林韦之豪袁蓓玲徐传艳朱睿杜福平
Owner SUZHOU UNIV
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