Titanium dioxide matrix up-conversion luminescent material excited by multi-wavelength laser at low power

A technology of titanium dioxide and luminescent materials, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of high power and difficulty in reaching the practical application level, and achieve the effects of simple preparation process, good up-conversion performance and high chemical stability

Inactive Publication Date: 2013-04-03
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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Problems solved by technology

[0005]In the existing research, the wavelengths of laser excitation of titanium dioxide-based up-conversion luminescent materials are usually 808nm and 980nm, and there is no 1064nm wavelength
At the same time, the 980nm laser pump power is relatively high (about 50mw), which is difficult to reach the practical application level and is limited to theoretical research

Method used

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  • Titanium dioxide matrix up-conversion luminescent material excited by multi-wavelength laser at low power
  • Titanium dioxide matrix up-conversion luminescent material excited by multi-wavelength laser at low power

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preparation example Construction

[0027] (2) Preparation of titanium hydroxide - under the stirring condition of 200~220 rpm, add glacial acetic acid to absolute ethanol, then drop in butyl titanate at a speed of 25~30 drops / min, stir well and then add deionized Water, fully stirred to completely generate titanium oxide precursor;

[0028] (3) Prepare lanthanum nitrate, erbium nitrate, and ytterbium nitrate into aqueous solutions with a concentration of 20%~25%, and add the three kinds of rare earth ion solutions in turn to the reaction vessel in step (2), at 200~220 rpm Slowly drip the above ammonia water at a rate of 25-30 drops / min under stirring until a precipitate is formed; then under the alkaline condition of pH=8-8.5, stir for 10-15 minutes and then vacuum filter;

[0029] (4) Dry the filtered colloid in a vacuum oven at 90°C~100°C for 4~5 hours;

[0030] (5) Grind the dried material into 200~250 mesh powder, put it into a crucible, cover it and put it into a calciner, raise the temperature to 1300~13...

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Abstract

The invention discloses a titanium dioxide matrix up-conversion luminescent material excited by a multi-wavelength laser at low power, which is prepared by the steps of: uniformly mixing prepared titanium oxide, lanthanum oxide, ytterbium oxide and erbium oxide and then drying for 2-3h in a vacuum drying box; and then grinding dried materials into 200-250mu powder, loading in a crucible and covering to be placed into a calcining furnace, raising the temperature to 1300-1350 DEG C at a speed of 10-15 DEG C per minute, keeping the temperature for 1-1.5h and then cooling with the furnace to the room temperature, taking out calcined materials, and grinding the calcined materials into 250-280mu powder to obtain the titanium dioxide matrix up-conversion luminescent material. The titanium dioxide matrix up-conversion luminescent material has higher chemical stability and better mechanical strength as well as excellent up-conversion property, and can be excited by a 1064nm laser under the condition of 8mw low power.

Description

technical field [0001] The invention relates to an up-conversion luminescent material doped with alkene earth ions in a titanium dioxide matrix. The up-conversion luminescent material can be excited by a laser with a wavelength of 1064nm under the condition of 8mw low power, and belongs to the technical field of optical functional materials. Background technique [0002] The main application fields of up-conversion luminescent materials include all-solid-state compact laser devices, up-conversion phosphors, three-dimensional displays, optical storage materials, etc., so they have great application value in national economy and national defense construction. [0003] Up-conversion luminescent materials are composed of two parts, namely host and activator. Most of the activators are rare earth ions. This is inseparable from the special energy level structure of rare earth elements. The matrix is ​​an important part of the upconversion material. Although the host material ge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/67
Inventor 邓建国刘东亮金永中
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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