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Tantalate-based up-conversion luminescence material and preparation method thereof

A luminescent material, tantalate technology, applied in the field of luminescent materials in luminescent physics, can solve problems such as difficult preparation and unstable performance, and achieve the effects of environmental friendliness, enhanced luminous intensity, and low production cost

Active Publication Date: 2015-06-17
徐州博创建设发展集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used matrix materials mainly include fluoride, oxyfluoride, sulfur oxide, halide, etc. These matrixes are not stable in performance and difficult to prepare, which limits their practical application.

Method used

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  • Tantalate-based up-conversion luminescence material and preparation method thereof
  • Tantalate-based up-conversion luminescence material and preparation method thereof
  • Tantalate-based up-conversion luminescence material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Preparation Y 9 Er 0.3 Yb 0.7 Ta 4 O 25 , According to the chemical formula Y 9 Er 0.3 Yb 0.7 Ta 4 O 25 The stoichiometric ratio of each element in yttrium oxide Y 2 O 3 :3.387g, tantalum oxide Ta 4 O 5 :1.473 grams, Erbium oxide Er 2 O 3 :0.191g, Ytterbium oxide Yb 2 O 3 : 0.460 grams. After grinding and mixing uniformly in an agate mortar, select the air atmosphere for the first pre-calcination, the pre-calcination temperature is 250 ℃, the pre-calcination time is 2 hours, then cool to room temperature, take out the sample, mix the mixture thoroughly and grind it evenly. In an air atmosphere, the second calcination was carried out at 650°C, the calcination time was 10 hours, cooled to room temperature, and the sample was taken out. Then the mixture is fully mixed and ground uniformly again, and the final calcination is carried out at 750°C in an air atmosphere. The calcination time is 20 hours. After cooling to room temperature, the powdered upconversion luminescent mat...

Embodiment 2

[0051] Preparation Y 8 Er 0.5 Yb 1.5 Ta 4 O 25 , According to the chemical formula Y 8 Er 0.5 Yb 1.5 Ta 4 O 25 The stoichiometric ratio of each element in yttrium oxide Y 2 O 3 :3.011g, tantalum oxide Ta 4 O 5 :1.473 grams, Erbium oxide Er 2 O 3 :0.319g, Ytterbium oxide Yb 2 O 3 : 0.985 grams. After grinding and mixing uniformly in an agate mortar, select air atmosphere for the first pre-calcination, the pre-calcination temperature is 200 ℃, the pre-calcination time is 1 hour, then cool to room temperature, take out the sample, mix and grind the mixture well, In an air atmosphere, the second calcination was carried out at 700°C, the calcination time was 20 hours, cooled to room temperature, and the sample was taken out. Then, the mixture is thoroughly mixed and ground uniformly again, and the final calcination is performed at 1000°C in an air atmosphere. The calcination time is 3 hours. After cooling to room temperature, the powdered upconversion luminescent material is obtained...

Embodiment 3

[0054] Preparation Y 7 Er 0.5 Yb 2.5 Ta 4 O 25 , According to the chemical formula Y 7 Er 0.5 Yb 2.5 Ta 4 O 25 The stoichiometric ratio of each element in yttrium oxide Y 2 O 3 :2.258g, tantalum oxide Ta 4 O 5 :1.263g, Erbium oxide 2 O 3 :0.273g, Ytterbium oxide Yb 2 O 3 : 1.407 grams. After grinding and mixing uniformly in an agate mortar, select air atmosphere for the first pre-calcination, the pre-calcination temperature is 300 ℃, the pre-calcination time is 3 hours, then cool to room temperature, take out the sample, mix the mixture thoroughly and grind uniformly, In an air atmosphere, perform the second calcination at 550°C, the calcination time is 9 hours, cool to room temperature, and take out the sample; then mix and grind the mixture thoroughly again, and perform the last time at 800°C in an air atmosphere Calcining, the calcining time is 19 hours, cooling to room temperature, and grinding to obtain a powdered upconversion luminescent material.

[0055] See attached Fig...

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Abstract

The invention discloses a tantalate-based up-conversion luminescence material and a preparation method thereof. The chemical composition of the material is Y10-x-yErxYbyTa4O25, wherein x is the molar percentage of doped erbium ions Er<3+>, y is the molar percentage of doped ytterbium ions Yb<3+>, and the sum of x and y is not smaller than 0.001 and smaller than 10. The material has a green luminescence peak nearby 550nm under the excitation of 970nm infrared laser and has stable performances and high up-conversion efficiency, the luminous intensity of the material enhances with the increase of excitation diode energy, the matrix structure is stable, the concentration of doped rare earth is high, and the high concentration is in favor of enhancing the luminescence efficiency and realizing excitation under high power. The material is prepared through mixing compounds containing elements required by the synthesis of the luminescence material in proportion, and by adopting a high temperature calcining, chemical solution or coprecipitation technology. The method has the advantages of flexibility, abundant sources of raw materials, low price, simple preparation process, and low production cost.

Description

Technical field [0001] The invention relates to a fluorescent powder and a preparation method thereof, in particular to a tantalate-based up-conversion luminescent material and a preparation method thereof, belonging to the technical field of luminescent materials in luminescence physics. Background technique [0002] Stokes’ law believes that materials can only be excited by high-energy light and emit low-energy light. However, it was later discovered that some materials can actually achieve the opposite luminous effect to the above law, called anti-Stokes luminescence. Also known as Up-Conversion, it is an important type of rare earth luminescent material. [0003] Generally, among photoluminescent materials, up-conversion luminescent materials can convert long-wavelength infrared / near-infrared excitation light into short-wavelength visible emission light through a multiphoton absorption mechanism. The up-conversion material is mainly a solid compound doped with rare earth eleme...

Claims

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Application Information

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IPC IPC(8): C09K11/78
Inventor 乔学斌
Owner 徐州博创建设发展集团有限公司
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