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Yb<3+> activated boron tungstate up-conversion luminescent material and preparation method thereof

A technology of luminescent materials and borotungstate, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems such as the preparation method and application of borotungstate that have not been reported in the literature, and achieve low equipment requirements, convenient synthesis, and reduced The effect of production costs

Inactive Publication Date: 2013-05-22
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, the ytterbium ion Yb 3+ The up-conversion luminescent material, preparation method and application of activated borotungstate have not been reported in the literature

Method used

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  • Yb&lt;3+&gt; activated boron tungstate up-conversion luminescent material and preparation method thereof
  • Yb&lt;3+&gt; activated boron tungstate up-conversion luminescent material and preparation method thereof
  • Yb&lt;3+&gt; activated boron tungstate up-conversion luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] According to the chemical formula La 0.95 Yb 0.05 BWO 6 The stoichiometric ratio of each element in , respectively weigh lanthanum oxide La 2 o 3 : 0.5159 g, ytterbium oxide Yb 2 o 3 : 0.0328 g, boric acid H 3 BO 3 : 0.31 g, tungsten oxide WO 3 : 0.7883 g, after grinding and mixing uniformly in an agate mortar, select the air atmosphere for the first calcination, the temperature is 300 ℃, the calcination time is 4 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 then sintered for the second time at 1000°C in an air atmosphere for 8 hours, and then cooled to room temperature to obtain a powdery phosphor.

[0040] See attached figure 1 According to the comparison of the X-ray powder diffraction pattern of the sample prepared according to the technical scheme of this embodiment and the standard card PDF#35-0261, the prepared material is a single-phase m...

Embodiment 2

[0044] According to the chemical formula La 0.9 Yb 0.1 BWO 6 The stoichiometric ratio of each element in , weigh lanthanum nitrate La(NO 3 ) 3 ?6H 2 O: 1.299 g, ytterbium oxide Yb 2 o 3 : 0.0657 g, boric acid H 3 BO 3 : 0.31 g, tungsten oxide WO 3 : 0.7883 g, after grinding and mixing uniformly in an agate mortar, choose the air atmosphere for the first calcining, the temperature is 350 ° C, the calcining time is 2 hours, then cool to room temperature, and take out the sample. After the first calcination of the raw materials, the mixture is thoroughly mixed and ground evenly, and the second sintering is carried out at 800°C in an air atmosphere. The sintering time is 7 hours, and cooled to room temperature to obtain a powdery phosphor.

[0045] See attached Figure 4 , is the up-conversion luminescence spectrum obtained under the excitation of infrared light at 975 nm and excitation energy intensity of 0.46 watts by the sample prepared according to the technical sche...

Embodiment 3

[0047] According to the chemical formula Pr 0.8 Yb 0.2 BWO 6 The stoichiometric ratio of each element in , respectively weighed praseodymium oxide Pr 6 o 11 : 0.4540 g, ytterbium oxide Yb 2 o 3 : 0.1314 g, boron oxide B 2 o 3 : 0.1184 g, tungsten oxide WO 3 : 0.7883 g, after grinding and mixing uniformly in an agate mortar, select the air atmosphere for the first calcination, the temperature is 650 ° 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 thoroughly mixed and ground evenly, and the second sintering is carried out at 900°C in an air atmosphere. The sintering time is 6 hours, and cooled to room temperature to obtain powdery phosphor.

[0048] See attached Figure 5 , is the up-conversion luminescence spectrum obtained under the excitation of infrared light at 975 nm and excitation energy intensity of 0.60 watts by the sample prepared according to the tec...

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Abstract

The invention discloses a Yb<3+> activated boron tungstate up-conversion luminescent material and a preparation method thereof. Molecular formula of the luminescent material is expressed as R1-xYbxBWO6, wherein R represents one of La<3+>, Pr<3+> and Nd<3+>, X represents a mol percent of doped Yb<3+>, and x is not greater than 0.5 and greater than 0.0001. The preparation method adopts a solid-phase synthesis or chemical synthesis process, and is simple in preparation process; the up-conversion luminescent material is synthesized in the air without production of a reducing atmosphere, so that demand on the equipment is comparatively low and production cost is reduced. The prepared up-conversion luminescent material is stable in performance, and has advantages of high color purity, high brightness and the like; the up-conversion luminescent material, excited by a 975nm infrared laser, can realize up-conversion luminescence of blue and green; and the up-conversion luminescent material has application prospects in the fields of printing anti-counterfeiting, 3-dimensional display, laser medicine, high-density data storage, etc.

Description

technical field [0001] The invention relates to a kind of ytterbium ion Yb 3+ The activated borotungstate up-conversion luminescent material and its preparation method particularly relate to an up-conversion material that emits visible blue-green light under the excitation of infrared light, and belongs to the technical field of luminescent materials. Background technique [0002] The up-conversion effect of up-conversion luminescent materials turns invisible infrared light into visible light, also known as anti-Stokes law luminescent materials, mainly for the conversion of near-infrared light. Materials with this characteristic are used in printing anti-counterfeiting, three-dimensional Stereoscopic display, laser medical treatment and high-density data storage have good application prospects. [0003] Rare earth ytterbium ion Yb 3+ It is an active ion with very good luminescence performance, and its energy level structure is very simple, only 2 f 7 / 2 and 2 f 5 / 2 Two ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
Inventor 黄彦林韦之豪袁蓓玲徐传艳秦琳陶正旭关莹
Owner SUZHOU UNIV
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