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A kind of up-conversion fluorescent material and preparation method thereof

A fluorescent material and calcination technology, which is applied in the direction of luminescent materials, chemical instruments and methods, electrical components, etc., can solve the problems of fluoride physical and chemical properties defects, low product phase purity, limited application, etc., and achieve simple preparation method, High-efficiency luminescence, good luminous effect

Inactive Publication Date: 2017-05-10
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these materials are prepared by hydrothermal method, which has the disadvantages of low yield and low purity of the product phase, and the application of fluoride is limited due to its own physical and chemical performance defects.

Method used

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  • A kind of up-conversion fluorescent material and preparation method thereof
  • A kind of up-conversion fluorescent material and preparation method thereof
  • A kind of up-conversion fluorescent material and preparation method thereof

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preparation example Construction

[0035] The present invention also provides a method for preparing the above-mentioned up-conversion fluorescent material, comprising:

[0036] According to (RE 1-x-y RE' x RE" y ) 2 TeO 6 In the middle atom molar ratio, the compound containing RE, the compound containing RE', the compound containing RE" and the compound containing tellurium are mixed and ground to obtain the mixture, which is then calcined to obtain an up-conversion fluorescent material; the RE, RE' and RE" are rare earth ions; x and y are doping moles, x is 0.01-0.3, and y is 0-0.2.

[0037] The RE, RE', RE", x, and y are the same as those described above, and will not be repeated here.

[0038] The compound containing RE is preferably one or more of oxides containing RE, carbonates containing RE, nitrates containing RE and hydroxides containing RE; the compound containing RE' is preferably One or more of oxides containing RE', carbonates containing RE', nitrates containing RE' and hydroxides containing...

Embodiment 1

[0046] Example 1: Up-conversion fluorescent material Lu 1.8 Yb 0.2 TeO 6 preparation and luminescence

[0047] According to the chemical formula Lu 1.8 Yb 0.2 TeO 6 The stoichiometric ratio of each element in the formula is weighed separately: lutetium oxide Lu 2 O 3 642.81mg, ytterbium oxide Yb 2 O 3 70.73mg with tellurium dioxide TeO 2 286.46 mg; Grind all the weighed raw materials in an agate mortar and mix them uniformly; select the air atmosphere, pre-sinter the obtained mixed raw materials in a muffle furnace at 750 ° C for 8 hours, cool to room temperature; grind again and After mixing evenly, calcinate at 850°C for 12 hours in a muffle furnace, and cool to room temperature to obtain the up-conversion fluorescent material Lu 1.8 Yb 0.2 TeO 6 .

[0048] The up-conversion fluorescent material Lu obtained in embodiment 1 was analyzed by X-ray diffraction. 1.8 Yb 0.2 TeO 6 Analyzed to obtain its X-ray diffraction pattern as figure 1 As shown, the results sh...

Embodiment 2

[0050] Example 2: Up-conversion fluorescent material Gd 1.88 Yb 0.10 Er 0.02 TeO 6 preparation and luminescence.

[0051] According to the chemical formula Gd 1.88 Yb 0.1 Er 0.02 TeO 6 The stoichiometric ratio of each element in is weighed separately: gadolinium oxide Gd 2 O 3 650.44mg, ytterbium oxide Yb 2 O 3 37.61 mg, erbium oxide Er 2 O 3 7.30mg and 304.65mg of tellurium dioxide; Grind all the weighed raw materials in an agate mortar and mix them evenly to obtain a mixture; choose an air atmosphere, pre-sinter the resulting mixture in a muffle furnace at 700°C for 8h, cool to room temperature; after grinding again and mixing uniformly, calcined at 900°C for 12 hours in a muffle furnace, and cooled to room temperature to obtain the up-conversion fluorescent material Gd 1.88 Yb 0.1 Er 0.02 TeO 6 .

[0052] The up-conversion fluorescent material Gd obtained in embodiment 2 is analyzed by X-ray diffraction 1.88 Yb 0.1 Er 0.02 TeO 6 Analyzed to obtain its X...

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Abstract

The invention provides an up-converting luminescence material and a preparation method thereof. According to the atom mole ratio of (RE1-x-yRE'xRE''y) 2TeO6, an RE-bearing compound, an RE'-bearing compound, an Re''-bearing compound and a Te-bearing compound are mixed and ground, so that a mixture is obtained; afterwards, the mixture is calcinated, so that the up-converting luminescence material is obtained. Compared with the prior art, the rare earth tellurite material is used as a host material, the maximum concentration of rare earth ions contained in each crystal lattice can reach 1,022 cm<-3> order of magnitude, high-concentration doping of other rare earth ions is easy to achieve, excitation energy absorption and energy transfer between the rare earth ions can be enhanced by increasing the doping concentration, and therefore high-efficiency luminescence is achieved. Meanwhile, the tellurite has good luminescence, heat stability and chemical stability, so the stability of physical and chemical properties of the up-converting luminescence material can be improved. Besides, the preparation method of the up-converting luminescence material is simple.

Description

technical field [0001] The invention belongs to the technical field of inorganic fluorescent materials, and in particular relates to an up-conversion fluorescent material and a preparation method thereof. Background technique [0002] Rare-earth up-conversion materials because of their relatively low light intensity (1-10 3 W / cm 2 ) excitation can achieve high-efficiency anti-Stokes luminescence and has attracted people's attention. Since the 1990s, with the maturity of high-power semiconductor laser technology, the use of rare earth erbium ions Er 3+ Activated crystalline materials have successfully achieved room temperature upconversion laser operation. In addition, up-conversion luminescent materials have broad application prospects in many fields such as white light lighting, three-dimensional display, infrared anti-counterfeiting, and data storage. The research on high-performance up-conversion materials has become a hot spot in material science research today. [...

Claims

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Application Information

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IPC IPC(8): C09K11/88H01L33/50
Inventor 唐剑锋杨川雒大豪何洪李春梅李元
Owner SOUTHWEST UNIVERSITY