Temperature detection method based on excitation intensity ratio of rare earth Dy < 3 + > ions

A detection method and intensity ratio technology, applied in the field of temperature detection, can solve problems such as different temperature sensing characteristics, and achieve the effect of high repeatability and good cycle stability

Pending Publication Date: 2022-07-08
DALIAN NATIONALITIES UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In addition, in the currently reported methods for temperature detection based on the excitation intensity ratio technology, there is a strong dependence on the two excited state intensities in the excitation intensity ratio, and choosing different excited state intensities will lead to different temperature sensing. characteristic

Method used

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  • Temperature detection method based on excitation intensity ratio of rare earth Dy &lt; 3 + &gt; ions
  • Temperature detection method based on excitation intensity ratio of rare earth Dy &lt; 3 + &gt; ions
  • Temperature detection method based on excitation intensity ratio of rare earth Dy &lt; 3 + &gt; ions

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Embodiment 1

[0039] image 3 Dy of the present invention is given 3+ Doped with CaWO 4 Phosphors at excitation wavelength λ 1 = 352nm 4 kinds of excitation peak intensity ratios versus temperature. in The variation of the three excitation peak intensity ratios R with the temperature T is obtained by the formula

[0040]

[0041] fit, and The variation of the intensity ratio R with temperature can be obtained by the formula

[0042]

[0043] Fitting is performed, and the fitting constants a, b, and c in equations (1) and (2) are obtained. It can be seen from the figure that in the temperature range of 300-650K, the four excitation peak intensity ratios have a good quantitative relationship with temperature, indicating that based on Dy 3+ The ratio of excitation intensity of ions to temperature can exhibit excellent temperature sensing characteristics in a wide temperature range.

[0044] According to the definition of absolute temperature sensing sensitivity S a =dR / dT, t...

Embodiment 2

[0058] Figure 7 a gives Dy of the present invention 3+ Doped with CaWO 4 Phosphors at excitation wavelength λ 2 = 326nm 4 kinds of excitation peak intensity ratios versus temperature. in The variation of the three excitation peak intensity ratios R with temperature can be fitted by empirical formula (1), The variation of intensity ratio R with temperature can be fitted by formula (2). It can be seen from the figure that in the temperature range of 300-650K, the four excitation peak intensity ratios have a good quantitative relationship with temperature, indicating that Dy 3+ The ratio of excitation intensity to temperature exhibits excellent temperature sensing properties in a wide temperature range.

[0059] Figure 7 b is calculated according to formula (3) and formula (4) based on Dy 3+ Doped with CaWO 4 phosphor Temperature sensing sensitivity curves for 4 excitation peak intensity ratios. It can be seen from the figure that in the whole experimental tem...

Embodiment 3

[0061] Figure 8 a gives Dy of the present invention 3+ Doped with CaWO 4 Phosphors at excitation wavelength λ 3 = 366nm 4 kinds of excitation peak intensity ratios versus temperature. in The variation of the three excitation peak intensity ratios R with temperature can be fitted by empirical formula (1), The variation of intensity ratio R with temperature can be fitted by formula (2). It can be seen from the figure that in the temperature range of 300-650K, the four excitation peak intensity ratios have a good quantitative relationship with temperature, indicating that Dy 3+ The ratio of excitation intensity to temperature exhibits excellent temperature sensing properties in a wide temperature range.

[0062] Figure 8 b is calculated according to formula (3) and formula (4) based on Dy 3+ Doped with CaWO 4 phosphor Temperature sensing sensitivity curves for 4 excitation peak intensity ratios. It can be seen from the figure that in the whole experimental tem...

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Abstract

The invention belongs to the technical field of temperature detection, and discloses a temperature detection method based on the excitation intensity ratio of rare earth Dy < 3 + > ions. Comprising the following steps: measuring excitation light peak intensity corresponding to two emission wavelengths A and B of the Dy < 3 + >-doped CaWO4 fluorescent powder at a certain temperature, calculating the ratio of the excitation light intensity sum at the temperature, changing the temperature of the Dy < 3 + >-doped CaWO4 fluorescent powder, repeating the steps, and fitting a curve obtained in the step S3 by adopting a formula to obtain the Dy < 3 + >-doped CaWO4 fluorescent powder. The novel temperature measurement method based on the rare earth Dy < 3 + > ion excitation intensity ratio technology is realized by adopting excitation peak intensity corresponding to two different emission wavelengths of the rare earth Dy < 3 + > ions and through the quantitative relation between the intensity ratio of the two excitation peak intensity and the temperature, and the novel temperature measurement method based on the rare earth Dy < 3 + > ion excitation intensity ratio technology is realized through the temperature measurement technology based on the rare earth Dy < 3 + > ion excitation intensity ratio. The material has good cycling stability, repeatability and high temperature detection sensitivity.

Description

technical field [0001] The invention belongs to the technical field of temperature detection, and in particular relates to a rare earth-based Dy 3+ A temperature detection method for ion excitation intensity ratios. Background technique [0002] Temperature is a very important parameter in the fields of chemical reactions, biological functions and various physical phenomena. Local temperature measurements at smaller scales often rely on non-contact thermometry techniques, the most common of which is infrared thermography, which measures the temperature of an object's surface based on the thermal radiation emitted by the object. Another non-contact temperature measurement technology that has received widespread attention is fluorescence temperature detection technology, which realizes temperature measurement by detecting various fluorescence spectroscopy parameters of fluorescent materials that change with temperature. Compared with traditional thermal imaging thermometry, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/00
CPCG01K11/00
Inventor 曹保胜廖志超李磊朋丛妍何洋洋张振翼冯志庆董斌
Owner DALIAN NATIONALITIES UNIVERSITY
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