Optical temperature measurement material with high sensitivity and signal discrimination, preparation method and application

A high-sensitivity, optical temperature measurement technology, applied in the direction of luminescent materials, chemical instruments and methods, thermometers, etc., can solve the problems of temperature measurement sensitivity and poor signal discrimination, to avoid mutual interference, high signal discrimination, light conversion high efficiency effect

Active Publication Date: 2021-07-16
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

However, the temperature measurement sensitivity and signal discrimination obtained by the thermally coupled energy level temperature measurement material technology based on single-doped rare earth ions are relatively poor.

Method used

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  • Optical temperature measurement material with high sensitivity and signal discrimination, preparation method and application
  • Optical temperature measurement material with high sensitivity and signal discrimination, preparation method and application
  • Optical temperature measurement material with high sensitivity and signal discrimination, preparation method and application

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preparation example Construction

[0038] The preparation method of the above-mentioned optical temperature measuring material with high sensitivity and signal discrimination comprises the following steps: using a high-temperature solid-phase method, weighing the raw materials according to the atomic ratio composition represented by the general formula (I), grinding and mixing the mixture uniformly, and then mixing the mixture in The product obtained by roasting in an air atmosphere and grinding after cooling is the optical temperature measuring material with high sensitivity and signal discrimination.

[0039] Preferably, the raw materials are strontium-containing compounds, lanthanum-containing compounds, terbium-containing compounds, europium-containing compounds, sodium-containing compounds, fluorine-containing compounds and phosphates;

[0040] The strontium-containing compound is a mixture of one or more of strontium oxides, hydroxides or carbonates;

[0041] The lanthanum-containing compound, terbium-con...

Embodiment 1

[0052] Strontium carbonate (SrCO 3 ) 1.1072g, strontium fluoride (SrF 2 ) 0.1884g, sodium bicarbonate (NaHCO 3 ) 0.2520g, ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) 1.0352g, lanthanum oxide (La 2 o 3 )0.4814g, terbium oxide (Tb 4 o 7 )0.0056g and europium oxide (Eu 2 o 3 ) 0.0026g, the above-mentioned raw materials were fully ground and mixed in a mortar, then placed in a corundum crucible, baked in a high-temperature furnace at 1200 ° C for 2 hours, cooled to room temperature, taken out, and after grinding and dispersing, the composition of Sr 3 La 0.985 Na(PO 4 ) 3 F:Tb 0.01 , Eu 0.005 optical temperature measurement materials.

[0053] Carry out X-ray powder diffraction (XRD) to the fluorescent material prepared in this embodiment with Bruker D8Focus type diffractometer, test conditions are: Cu Kα radiation, λ=0.15405nm, accelerating voltage and emission current are respectively 40kV and 40mA, scan range: 2θ=10-80o; test results see image 3 , image 3...

Embodiment 2

[0056] Strontium carbonate (SrCO 3 ) 1.3287g, ammonium fluoride (NH 4 F) 0.1111g, sodium carbonate (NaCO 3 ) 0.1590g, diammonium hydrogen phosphate ((NH 4 ) 2 HPO 4 ) 1.1885g, lanthanum oxide (La 2 o 3 ) 0.4545g, terbium oxide (Tb 4 o 7 )0.0280g and europium oxide (Eu 2 o 3 ) 0.0106g, the above-mentioned raw materials were fully ground and mixed in a mortar, then placed in a corundum crucible, baked in a high-temperature furnace at 1100°C for 3 hours, cooled to room temperature, taken out, and after grinding and dispersing, the composition of Sr 3 La 0.93 Na(PO 4 ) 3 F:Tb 0.05 , Eu 0.02 optical temperature measurement materials. After characterization by X-ray powder diffraction technology, it is proved that the prepared target compound is a pure phase, as shown in the attached description Figure 4 shown.

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Abstract

The invention relates to an optical temperature measurement material with high sensitivity and signal discrimination, a preparation method and application thereof. The optical temperature measurement material has an atomic ratio composition represented by general formula (I): Sr 3 La (1‑x‑y) Na(PO 4 ) 3 F:Tb x , Eu y (I), wherein, 0.01≤x≤0.5, 0.005≤y≤0.5, 0.015≤x+y≤1, which is prepared by a high-temperature solid-phase method; under the effective excitation of ultraviolet light, the Tb 3+ with Eu 3+ As the dual luminescent centers simultaneously emit their respective characteristic spectra, by monitoring the two characteristic spectra, the temperature is calibrated by using the fluorescence intensity ratio of the dual luminescent centers. Compared with the prior art, the temperature measurement material of the present invention has a large signal discrimination (545nm / 700nm), high temperature measurement sensitivity (relative temperature measurement sensitivity is about 0.70% / K), and a wide temperature measurement range (303K-483K) .

Description

technical field [0001] The invention relates to the field of optical temperature measurement materials, in particular to an optical temperature measurement material with high sensitivity and signal discrimination, a preparation method and an application. Background technique [0002] In recent years, non-contact temperature detection based on the optical response of matter has become a hot spot of attention and research because of its unparalleled advantages. Within a certain temperature range, certain optical properties of rare earth phosphors, such as peak position, fluorescence intensity ratio, spectral linewidth, and fluorescence lifetime attenuation, change regularly with temperature. The variation of these optical properties with temperature is large enough, monotonous, and repeatable, that is, at a certain temperature, the optical response characteristics always show a specific value, so the changes in these optical properties can be used to calibrate the temperature...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/86G01K11/14
CPCC09K11/7796G01K11/14
Inventor 郭宁丁宇周慧涛潘颖宋悦悦梁启蒙欧阳瑞镯
Owner UNIV OF SHANGHAI FOR SCI & TECH
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