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A tantalate-based up-conversion luminescent material and its preparation method

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

Active Publication Date: 2016-08-24
徐州博创建设发展集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A tantalate-based up-conversion luminescent material and its preparation method
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  • A tantalate-based up-conversion luminescent material and its preparation method

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 the yttrium oxide Y 2 o 3 : 3.387 g, tantalum oxide Ta 4 o 5 : 1.473 g, erbium oxide Er 2 o 3 : 0.191 g, ytterbium oxide Yb 2 o 3 : 0.460 g. After grinding and mixing uniformly in an agate mortar, choose the air atmosphere for the first pre-calcination, the pre-calcination temperature is 250 ° C, the pre-calcination time is 2 hours, then cool to room temperature, take out the sample, mix the mixture fully and grind it evenly, Carry out the second calcination at 650° C. for 10 hours in an air atmosphere, cool to room temperature, and take out the sample. Then the mixture is fully mixed and ground evenly, and the last calcination is carried out in air atmosphere at 750° C. for 20 hours, cooled to room temperature, and ground to obtain a powdery up-conversion luminescent material.

[0047] See attached figure...

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 the yttrium oxide Y 2 o 3 : 3.011 g, tantalum oxide Ta 4 o 5 : 1.473 g, erbium oxide Er 2 o 3 : 0.319 g, ytterbium oxide Yb 2 o 3 : 0.985g. After grinding and mixing uniformly in an agate mortar, choose the air atmosphere for the first pre-calcination, the pre-calcination temperature is 200 ° C, the pre-calcination time is 1 hour, then cool to room temperature, take out the sample, mix the mixture fully and grind evenly, In the air atmosphere, the second calcination was carried out at 700° C. for 20 hours, cooled to room temperature, and samples were taken out. Then fully mix and grind the mixture again, and perform final calcination in air atmosphere at 1000°C for 3 hours, cool to room temperature, and grind to obtain powdery up-conversion luminescent material.

[0052] See attached Figure 4 , is the up-...

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 the yttrium oxide Y 2 o 3 : 2.258 grams, tantalum oxide Ta 4 o 5 : 1.263 g, erbium oxide Er 2 o 3 : 0.273 g, ytterbium oxide Yb 2 o 3 : 1.407 g. After grinding and mixing uniformly in the agate mortar, select the air atmosphere for the first pre-calcination, the pre-calcination temperature is 300 ° C, the pre-calcination time is 3 hours, then cool to room temperature, take out the sample, mix the mixture fully and grind evenly, In the air atmosphere, the second calcination is carried out at 550°C, the calcination time is 9 hours, cooled to room temperature, and the sample is taken out; then the mixture is fully mixed and ground again, and the last time is carried out in the air atmosphere at 800°C Calcination, the calcination time is 19 hours, cooled to room temperature, and ground to obtain powdery up-conve...

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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, and belongs 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, but later people discovered that some materials can actually achieve a luminous effect that is exactly the opposite of the above-mentioned law, called anti-Stokes luminescence. Also known as up-conversion luminescence (Up-Conversion), it is an important class of rare earth luminescent materials. [0003] Generally, among photoluminescent materials, up-conversion luminescent materials can convert infrared / near-infrared long-wavelength excitation light into short-wavelength visible emission light through a multi-photon absorption mechanism. The up-conversion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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