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Rare-earth element-containing up-conversion luminescent temperature sensitive material as well as preparation method and application thereof

A technology of rare earth elements and sensitive materials, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of limited application and low luminous efficiency.

Inactive Publication Date: 2015-04-01
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to the report of Chinese patent CN102321575, this kind of perovskite structure oxide material is used as the up-conversion material of the matrix, and the luminous efficiency is low, which limits its application.

Method used

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  • Rare-earth element-containing up-conversion luminescent temperature sensitive material as well as preparation method and application thereof
  • Rare-earth element-containing up-conversion luminescent temperature sensitive material as well as preparation method and application thereof
  • Rare-earth element-containing up-conversion luminescent temperature sensitive material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] prepared by high energy ball milling (Na 0.5 Er 0.5 )TiO 3 Powder material, the preparation method is as follows:

[0068] Using high-purity sodium carbonate (99.8%), erbium oxide powder (99.9%), and titanium dioxide powder (99.9%) as raw materials, weigh the raw materials according to the stoichiometric ratio, put the weighed raw materials into a special ball mill tank, and then A certain amount of stearic acid is added thereto, and a small amount of n-amyl alcohol is added simultaneously. Finally, the PULVERISETTE 5 high-energy ball mill was used for high-speed ball milling for 4 hours, the speed was set at 350 rpm, and the ball milling was performed in forward and reverse mode. The milling time and intermittent interval were 20 minutes and 20 minutes, respectively. Then dilute the mixed material after ball milling with absolute ethanol, remove stearic acid after standing still, and then use a centrifuge to separate it, take out the pretreated powder, then heat tre...

Embodiment 2

[0070] Prepared by molten salt method (Na 0.5 Er 0.5 )TiO 3 Powder material, the preparation method is as follows:

[0071] According to the general chemical formula (Na 0.5 Er 0.5 )TiO 3 , the initial raw materials are high-purity sodium chloride (NaCl, 98%), erbium oxide powder (Er 2 o 3 , 99.9%), titanium dioxide powder (TiO 2 , 99.9%); and weigh each initial raw material according to its stoichiometric ratio, and add lithium chloride to it as a molten salt (the mass ratio of initial raw material to LiCl is 1:1.2), and put the mixed raw material in an agate mortar Grind for 3 hours to make it evenly mixed to make a precursor powder for molten salt reaction. Then transfer the precursor powder to a corundum crucible with a cover, and finally heat-treat at 750°C for 10 hours. After cooling in the furnace, soak it in deionized warm water (water temperature 80°C) for 36 hours to make it soft (you can add deionized water to prevent it from drying out). Then change t...

Embodiment 3

[0073] prepared by solvothermal method (Na 0.5 Er 0.5 )TiO 3 Powder material, the preparation method is as follows:

[0074] According to the chemical formula (Na 0.5 Er 0.5 )TiO 3 , where the initial raw materials are high-purity potassium hydroxide (NaOH, 99%), erbium nitrate [Er(NO 3 ) 3 ·5H 2 O, 99.9%], titanium tetra-n-butoxide (tetrabutyl titanate) liquid (C 16 h 36 o 4 Ti, 98%); each initial raw material was weighed according to its stoichiometric ratio. The solvent is deionized water, absolute ethanol, and ethylene glycol; after mixing the raw materials, add them to deethylene glycol and fully stir to dissolve them completely. Then add an appropriate amount of NaOH to the mixed solution and make it fully dissolved. Finally, the mixed solution is transferred to a hydrothermal kettle for solvothermal reaction, the reaction temperature is 180°C, and the reaction time is 24 hours; after the solvent heat treatment, the upper layer solution is poured out, and the...

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Abstract

The invention relates to a rare-earth element-containing up-conversion luminescent temperature sensitive material as well as a preparation method and application thereof. The luminescent material has a general chemical formula of (A0.5Re0.5)TiO3, wherein A is selected from one or more of Rb, K, Na, Li and Ag, and Re is selected from one or more of Er, Yb, Pr, Eu, Ho, Tm, Tb and Dy. The sensitive material can be used for preparing the material provided by the invention, and the luminescent material prepared by the method provided by the invention has excellent up-conversion luminescent performance and temperature sensitivity, high luminescent intensity, good temperature sensitivity, a wide application temperature range, stable chemical performance and a controllable physical size, is easy to prepare, is relatively low in cost, and has a wide application prospect in the fields of fluorescent temperature sensors, short-wave emission solid lasers, biological molecular fluorescence labeling, infrared detection and anti-counterfeiting, three-dimensional display, photoelectric integrated devices, solar batteries and the like.

Description

technical field [0001] The invention relates to a kind of up-conversion light-emitting temperature-sensitive material containing rare earth elements, a preparation method and application thereof, and belongs to the field of photoelectric multifunctional materials. Background technique [0002] Up-conversion materials refer to luminescent materials that can emit visible light when excited by infrared light, that is, materials that can convert infrared light into visible light. Because its luminescent process violates Stokes' law, it is also called anti-Stokes' law luminescent material. Since Auzel first reported Er in 1966 3+ and Yb 3+ Double-doped CaWO 4 Starting with up-conversion materials, the up-conversion luminescent process and its corresponding materials have attracted more and more scientists' attention. The first upconversion material with practical value is Er 3+ and Yb 3+ Co-doped LaF 3 , and has become a hotspot of related research for a certain period of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78C04B35/622
Inventor 王旭升李俊洪渲清柴晓娜李艳霞赵海峰冯晓敏刘茜
Owner TONGJI UNIV
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