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A kind of temperature-sensitive phosphor and its preparation method and application

A fluorescent powder and temperature-sensitive technology, applied in the field of fluorescent powder, can solve the problems of narrow temperature measurement range, low temperature measurement accuracy, and large temperature measurement range, achieving wide temperature measurement range, high temperature measurement accuracy, The effect of wide temperature range

Active Publication Date: 2022-07-08
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention provides a temperature-sensitive phosphor, which is sensitive to temperature, has a large temperature measurement range and high temperature measurement accuracy, and effectively solves the problem of the current optical temperature sensor phosphor. Existing problems of narrow temperature measurement range and low temperature measurement accuracy
[0005] The present invention also provides the application of the above-mentioned temperature-sensitive fluorescent powder in an optical temperature sensor. Narrow temperature measurement range and low temperature measurement accuracy caused by material performance limitations

Method used

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  • A kind of temperature-sensitive phosphor and its preparation method and application
  • A kind of temperature-sensitive phosphor and its preparation method and application
  • A kind of temperature-sensitive phosphor and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A Sr(Pr x Lu 1-x ) 2 O 4 (x=0.001) The preparation method of the phosphor is as follows:

[0060] 1. Take SrCO 3 , Lu 2 O 3 and Pr 6 O 11 As the initial raw material, the molar ratio of Sr:Pr:Lu is 1:0.002:1.998 for batching, and each raw material is ball-milled for 5 h to obtain a mixed powder with an average particle size of 0.5-5 μm;

[0061] 2. Press the mixed powder into a block at 40 MPa, put it into a platinum crucible, sinter it in the air at 1100°C for 10 hours, drop it to room temperature, and grind it to obtain a primary sintered powder with an average particle size of 0.5-15 μm. ;

[0062] 3. Press the initially fired powder into a block at 40 MPa, put it in a platinum crucible, sinter at 1600 °C for 6 h in a CO / Ar (volume ratio of 5:95) reducing atmosphere, and then drop to room temperature for grinding. get the final SrLu 2 O 4 : Pr (x=0.1 at.%) phosphor with an average particle size of 0.5-15μm.

[0063] The XRD pattern of the obtained phosph...

Embodiment 2

[0065] A Sr(Pr x Gd 1-x ) 2 O 4 (x=0.001) The preparation method of the phosphor is as follows:

[0066] 1. Take SrCO 3 , Gd 2 O 3 and Pr 6 O 11 As the initial raw material, the molar ratio of Sr:Pr:Gd is 1:0.002:1.998, and the ingredients are mixed with alcohol solution for 1 h. After drying in a fume hood at room temperature, grinding to obtain an average particle size of 0.5- 5 μm mixed powder;

[0067] 2. Press the mixed powder into a block at 40 MPa, put it in a corundum crucible, sinter it in the air at 1100 °C for 10 hours, then lower it to room temperature, and grind it to obtain a primary sintered powder with an average particle size of 0.5-15 μm. ;

[0068] 3. Press the initially fired powder into a block at 40 MPa, put it into a corundum crucible, and put it in a corundum crucible. 2 / Ar (volume ratio of 5:95) was sintered at 1550 °C for 5 h in a reducing atmosphere, cooled to room temperature, and ground to obtain the final SrGd 2 O 4: Pr (x=0.1 at.%) ...

Embodiment 3

[0072] A Sr(Pr x Y 1-x ) 2 O 4 (x=0.001) The preparation method of the phosphor is as follows:

[0073] 1. Take SrCO 3 , Y 2 O 3 and Pr 6 O 11 As the initial raw material, according to the molar ratio of Sr:Pr:Y is 1:0.002:1.998, the ingredients are mixed, and each raw material is wet-mixed with an alcohol solution for 1 h, dried at room temperature in a fume hood, and ground to obtain an average particle size of 0.5- 5 μm mixed powder;

[0074] 2. Press the mixed powder into a block at 40 MPa, put it into a corundum crucible, sinter it in the air at 1100 °C for 10 hours, lower it to room temperature, and grind it to obtain a primary sintered powder with an average particle size of 0.5-15 μm;

[0075] 3. Press the initially fired powder into a block at 40 MPa, put it into a corundum crucible, and put it in a corundum crucible under H 2 / Ar (volume ratio of 5:95) was sintered at 1550 °C for 5 h in a reducing atmosphere, cooled to room temperature, and ground to obtain...

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Abstract

The invention discloses a temperature-sensitive fluorescent powder and a preparation method and application thereof. The chemical formula of the temperature-sensitive fluorescent powder is Sr(Pr x Re 1‑x ) 2 O 4 , where x=0.0001‑0.1, and Re is at least one of Lu, Gd, and Y. The temperature-sensitive fluorescent powder body of the invention has good optical properties, chemical and thermal stability, and the luminous intensity is obviously affected by temperature, and is suitable for high-precision and wide-range optical temperature sensors. The temperature-sensitive phosphor is prepared by the solid-phase sintering method, and the whole preparation process is simplified, the production cycle is short, the production efficiency is high, and the industrial production is convenient.

Description

technical field [0001] The invention relates to a fluorescent powder, in particular to a temperature-sensitive fluorescent powder with temperature-sensitive properties, a preparation method and an application in an optical temperature sensor, and belongs to the technical field of fluorescent powders. Background technique [0002] The measurement of temperature is closely related to scientific research, production and life, and various physiological processes. There are many methods and instruments for temperature measurement. According to the different measurement principles, the sensors (thermometers) for measuring temperature can be mainly divided into the following three categories: (1) Traditional packaged liquid thermometers, the principle of which is the thermal expansion of liquids Properties of cold shrinkage; (2) Thermocouple-type temperature sensor utilizing the Seebeck effect; (3) Optical temperature sensor. The temperature measurement methods of the first two se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78G01K11/20
CPCC09K11/7769G01K11/20Y02B20/00
Inventor 王树贤叶正茂胡常庆马树伟王文波
Owner UNIV OF JINAN
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