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Thermoluminescent color-changing temperature-measuring fluorescent material and preparation method thereof

A fluorescent material and thermoluminescence technology, applied in the field of fluorescent materials for temperature measurement, can solve the problems of low sensitivity and signal resolution, and achieve high luminous intensity, high temperature measurement sensitivity, signal recognizability, and fast temperature-sensitive response Effect

Pending Publication Date: 2022-07-05
CHENGDU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem of low relative sensitivity and low signal resolution ability of single-doped temperature-measuring fluorescent materials in the prior art, the present invention provides a thermoluminescent color-changing temperature-measuring fluorescent material and a preparation method thereof, that is, by single-doping Eu 3+ , the use of matrix self-luminescence and rare-earth activated ion luminescence to achieve different thermal responses of dual emission, optical temperature measurement, with high temperature measurement sensitivity and signal recognizability

Method used

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  • Thermoluminescent color-changing temperature-measuring fluorescent material and preparation method thereof
  • Thermoluminescent color-changing temperature-measuring fluorescent material and preparation method thereof
  • Thermoluminescent color-changing temperature-measuring fluorescent material and preparation method thereof

Examples

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Embodiment 1

[0025] Example 1: The thermoluminescent color-changing temperature-measuring fluorescent material of this example, the chemical formula is CaNb 2 O 6 ;

[0026] Thermoluminescent color changing temperature measurement fluorescent material and preparation method thereof, the specific steps are as follows:

[0027] (1) The CaCO 3 (99.99%) 0.2503g and Nb 2 O 5 (99.99%) 0.6645g was mixed, then 4g of absolute ethanol was added, and the mixed powder was obtained by fully grinding with an agate mortar for 0.5h;

[0028] (2) calcining the mixed powder in step (1) at a temperature of 1200° C. in an air atmosphere for 4 hours, cooling to room temperature, and grinding to obtain a fluorescent material;

[0029] This example CaNb 2 O 6 The XRD pattern of the sample is shown in figure 1 ,from figure 1 It can be seen that the sample is a single phase and no impurity phase is generated;

[0030] This example CaNb 2 O 6 See the crystal structure of figure 2 , the structure has o...

Embodiment 2

[0034] Embodiment 2: The thermoluminescent color-changing thermometric fluorescent material of this embodiment, the chemical formula is Ca 0.998 Nb 2 O 6 :0.002Eu 3+ ;

[0035] The preparation method of the thermoluminescent color changing temperature measurement fluorescent material, the specific steps are as follows:

[0036] (1) The CaCO 3 (99.99%) 0.2497g, Nb 2 O 5 (99.99%) 0.6645g and Eu 2 O 3 (99.99%) 0.0018g was mixed, then 4g of ethanol was added, and the mixed powder was obtained by fully grinding with an agate mortar for 0.5h;

[0037] (2) calcining the mixed powder in step (1) at a temperature of 1100° C. in an air atmosphere for 5 hours, cooling to room temperature, and grinding to obtain a thermoluminescent and discolored thermometric fluorescent material;

[0038] This example Ca 0.998 Nb 2 O 6 :0.002Eu 3+ The XRD pattern of the sample is shown in figure 1 ,from figure 1 It can be seen that the sample is a single phase and no impurity phase is gene...

Embodiment 3

[0042] Embodiment 3: The thermoluminescent color-changing thermometric fluorescent material of this embodiment, the chemical formula is Ca 0.99 Nb 2 O 6 :0.01Eu 3+ ;

[0043] The preparation method of the thermoluminescent color changing temperature measurement fluorescent material, the specific steps are as follows:

[0044] (1) The CaCO 3 (99.99%) 0.2477g, Nb 2 O 5 (99.99%) 0.6645g and Eu 2 O 3 (99.99%) 0.0088g mixing; then adding 4g ethanol, fully grinding with agate mortar for 0.4h to obtain mixed powder;

[0045] (2) calcining the mixed powder in step (1) at a temperature of 1300° C. in an air atmosphere for 3 hours, cooling to room temperature, and grinding to obtain a thermoluminescent and discolored thermometric fluorescent material;

[0046] This example Ca 0.99 Nb 2 O 6 :0.01Eu 3+ The XRD pattern of the sample is shown in figure 1 ,from figure 1 It can be seen that the sample is a pure phase, and there is no impurity phase;

[0047] This example Ca 0...

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Abstract

The invention relates to a thermoluminescent color-changing temperature-measuring fluorescent material and a preparation method thereof, and belongs to the technical field of temperature-measuring fluorescent materials. The thermoluminescent color-changing temperature-measuring fluorescent material disclosed by the invention has a chemical formula of Ca (1-x) Nb2O6: xEu < 3 + >, x is less than or equal to 0.04 and belongs to an orthorhombic system structure, and the cell parameter temperature measurement fluorescent material is changed from blue light to red light along with temperature rise at the temperature of 293-413K. The temperature-measuring fluorescent material Eu < 3 + > is activated, the thermal response behaviors of matrix luminescence and rare earth activated ion luminescence to different temperatures are utilized to realize dual-luminescence center fluorescence intensity ratio temperature measurement, and the temperature-sensitive fluorescent material has the characteristics of high temperature-sensitive response speed, reversible color change, cyclic and repeated color change and the like.

Description

technical field [0001] The invention relates to a thermoluminescent color changing temperature measuring fluorescent material and a preparation method thereof, and belongs to the technical field of temperature measuring fluorescent materials. Background technique [0002] Temperature sensing is widely used in control manufacturing, safety production systems, environmental monitoring, etc., while traditional physical temperature probes have certain limitations in dynamic and non-contact systems. Optical thermometry solves this problem by using temperature-dependent optical parameters to monitor temperature. Among them, the optical temperature measurement technology based on the fluorescence intensity ratio (FIR) has the advantages of high temperature resistance, fast response time, high temperature resolution, and high precision because it can reduce the influence of measurement conditions. favored. This optical thermometry technique requires two distinguishable emissions t...

Claims

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Application Information

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IPC IPC(8): C09K9/00C09K11/67C01G33/00G01K11/14G01K11/20
CPCC09K9/00C09K11/673C01G33/00G01K11/14G01K11/20C01P2002/72C01P2006/60
Inventor 余雪朱楠楠郭龙超李子洋段伯松何青山
Owner CHENGDU UNIV
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