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Temperature-sensitive fluorescent powder and preparation method and application thereof

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, large temperature measurement range and temperature measurement accuracy, and achieve large temperature measurement range and high temperature measurement accuracy , the effect of wide temperature measurement range

Active Publication Date: 2020-05-12
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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  • Temperature-sensitive fluorescent powder and preparation method and application thereof
  • Temperature-sensitive fluorescent powder and preparation method and application thereof
  • Temperature-sensitive fluorescent powder and preparation method and application thereof

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 phosphor powder is as follows:

[0060] 1. With 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 h, cool it down to room temperature, and grind it to get the primary fired powder with an average particle size of 0.5-15 μm body;

[0062] 3. Press the first-fired powder into a block at 40 MPa, put it into a platinum crucible, sinter at 1600°C for 6 h in a CO / Ar (volume ratio: 5:95) reducing atmosphere, cool down to room temperature, and grind. Get the final SrLu 2 o 4 : Pr (x=0.1 at.%) phosphor, the average particle size is 0.5-15μm.

[0063] The XRD pattern of the obtained phosphor powder i...

Embodiment 2

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

[0066] 1. With 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 for batching, each raw material is wet mixed with alcohol solution for 1 h, dried in a fume hood at room temperature, and ground 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 into a corundum crucible, sinter it in the air at 1100°C for 10 hours, cool it down to room temperature, and grind it to get the first-fired powder with an average particle size of 0.5-15 μm ;

[0068] 3. Press the first-fired powder into a block under 40 MPa, put it into a corundum crucible, and 2 / Ar (volume ratio 5:95) in a reducing atmosphere at 1550 °C for 5 h, cooled to room temperature, and ground to obtain the final SrGd 2 o 4: Pr (x=0.1 at.%) phosphor, the average particle size is 0.5-...

Embodiment 3

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

[0073] 1. With SrCO 3 , Y 2 o 3 and Pr 6 o 11 As the initial raw material, the molar ratio of Sr:Pr:Y is 1:0.002:1.998 for batching, each raw material is wet mixed with alcohol solution for 1 h, dried in a fume hood at room temperature, 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, cool it down to room temperature, and grind it to obtain the first-fired powder with an average particle size of 0.5-15 μm;

[0075] 3. Press the first-fired powder into a block under 40 MPa, put it into a corundum crucible, and 2 / Ar (volume ratio 5:95) in a reducing atmosphere at 1550 °C for 5 h, cooled down to room temperature, and ground to obtain the final SrY 2 o 4 : Pr (x=0.1 at.%) phosphor, the average particle size is ...

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Abstract

The invention discloses temperature-sensitive fluorescent powder and a preparation method and application thereof. The chemical formula of the temperature-sensitive fluorescent powder is Sr (PrxRe1-x)2O4, wherein x is 0.0001-0.1, and Re is at least one of Lu, Gd and Y. The temperature-sensitive fluorescent powder has good optical characteristics and chemical and thermal stability, the luminous intensity is obviously influenced by temperature, and the temperature-sensitive fluorescent powder is suitable for high-precision and wide-range optical temperature sensors. The temperature-sensitive fluorescent powder is prepared by adopting a solid-phase sintering method, and the whole preparation process is simplified in process, short in production period, high in production efficiency and convenient for industrial production.

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 thereof and an application in an optical temperature sensor, belonging to the technical field of fluorescent powder. Background technique [0002] The measurement of temperature is closely related to scientific research, production and life, and various physiological processes. We have many means and instruments for temperature measurement. According to different measurement principles, sensors (thermometers) for measuring temperature can be mainly divided into the following three categories: (1) Traditional packaged liquid thermometers, whose principle is that liquid thermal expansion The nature of cold shrinkage; (2) Thermocouple type temperature sensor using Seebeck effect; (3) Optical temperature sensor. The temperature measurement methods of the first two sensors have some disadvant...

Claims

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Application Information

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Patent Type & Authority Applications(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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