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Up conversion phosphor with adjustable light color and its preparation process

An adjustable and fluorescent powder technology, applied in the field of fluorescent powder, can solve the problems of low luminous efficiency and complicated process, and achieve the effect of simple production process, good luminous performance and low cost

Inactive Publication Date: 2010-12-29
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, phosphors using this kind of rare earth composite fluoride as a matrix are generally prepared by liquid phase method, the process is complicated, and the size of the prepared powder is in the nanoscale range, and the luminous efficiency is not high

Method used

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  • Up conversion phosphor with adjustable light color and its preparation process
  • Up conversion phosphor with adjustable light color and its preparation process
  • Up conversion phosphor with adjustable light color and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] NaY 0.78 (Yb 0.2 Er 0.2 ) F 4 The preparation of fluorescent powder, the specific preparation process is as follows:

[0043] 1) Take Y by weighing the molar ratio of the above-mentioned stoichiometric formula 2 o 3 (4N)0.4404g, Yb 2 o 3 (4N)0.1970g and Er 2 o 3 (4N) 0.0191 g. Mix the prepared raw materials, use ethanol or distilled water as the medium, stir under a magnetic stirrer for 1-2 hours, then filter the slurry with suction and dry at 70°C.

[0044] 2) Weigh 0.2625g of NaF(AR) and NH 4 F(AR) 1.1100g is mixed with the dried powder in the previous step and ground in an agate grinder, and absolute ethanol is added dropwise during grinding to make the mix more uniform.

[0045] 3) The mixed powder is heat-treated in an air atmosphere in an electric furnace, and the heat-treatment process mainly goes through two steps. The sample was raised from room temperature to 450°C and kept at this temperature for 6 hours, then the temperature was raised to 575°C f...

Embodiment 2

[0050] NaYb 0.97 Er 0.03 f 4 The preparation of fluorescent powder, the specific preparation process is as follows:

[0051] 1) take Yb by weighing the mol ratio of above-mentioned stoichiometric formula 2 o 3 (4N)0.9556g and Er 2 o 3 (4N) 0.0287g. Mix the prepared raw materials, use ethanol or distilled water as the medium, stir under a magnetic stirrer for 1-2 hours, then filter the slurry with suction and dry at 70°C.

[0052] 2) Weigh 0.2625g of NaF(AR) and NH 4 F(AR) 1.1100g is mixed with the dried powder in the previous step and ground in an agate grinder, and absolute ethanol is added dropwise during grinding to make the mix more uniform.

[0053] 3) The mixed powder is heat-treated in an air atmosphere in an electric furnace, and the heat-treatment process mainly goes through two steps. The sample was raised from room temperature to 450°C and kept at this temperature for 6 hours, then the temperature was raised to 550°C for 6 hours, and finally cooled to room ...

Embodiment 3

[0056] NaY 0.598 (Yb 0.4 T m 0.002 )F 4 The preparation of fluorescent powder, the specific preparation process is as follows:

[0057] 1) Take Y by weighing the molar ratio of the above-mentioned stoichiometric formula 2 o 3 (4N)0.3376g, Yb 2 o 3 (4N)0.3941g and Tm 2 o 3 (4N) 0.0019 g. Mix the prepared raw materials, use ethanol or distilled water as the medium, stir under a magnetic stirrer for 1-2 hours, then filter the slurry with suction and dry at 70°C.

[0058] 2) Weigh 0.2625g of NaF(AR) and NH 4 F(AR) 1.1100g is mixed with the dried powder in the previous step and ground in an agate grinder, and absolute ethanol is added dropwise during grinding to make the mix more uniform.

[0059] 3) The mixed powder is heat-treated in an air atmosphere in an electric furnace, and the heat-treatment process mainly goes through two steps. The sample was raised from room temperature to 450°C and kept at this temperature for 6 hours, then the temperature was raised to 565°...

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Abstract

The present invention is up conversion phosphor with adjustable light color and its preparation process. The phosphor has stable chemical property, good light emitting performance, and capacity of emitting red, green and blue light in adjustable light color effectively under the excitation of 980 nm laser. It has the structural formula of NaY1-x-y(YbxEry)F4 or NaY1-x-z(YbxTm2)F4. Its preparation process includes the steps of: mixing the materials including Y2O3, Yb2O3, Er2O3 and Tm2O3 in certain weight proportion in alcohol or distilled water as medium to obtain slurry, suction filtering and stoving to obtain powder, mixing NaF, NH4F and the powder, grinding the mixture, heat treatment, heating to 450 deg.c and maintaining for 6 hr for reaction to generate (Y1-x-yYbxEry)F3, heat treatmentat 550-575 deg.c, cooling and post-treatment.

Description

technical field [0001] The invention relates to a fluorescent powder, in particular to a rare earth fluorescent material that can be effectively excited by a 980nm laser to emit strong red light, green light and blue light, and the light color of the fluorescent powder can be adjusted by adjusting the sample formula and its preparation method. Background technique [0002] Up-conversion luminescent materials refer to materials that can emit fluorescence shorter than the excitation wavelength when excited by light (Zhang Zhongtai Zhang Junying. Inorganic photoluminescent materials and their applications, Chemical Industry Press, 2005). In recent years, the emergence and maturity of high-power infrared laser diodes have made them a very effective pump source for upconversion luminescent materials. This kind of up-conversion material is excited by infrared light or near-infrared light source, and fluorescence in red, blue, green and even ultraviolet bands can be obtained witho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/85
Inventor 熊兆贤吴尤娜
Owner XIAMEN UNIV