A method to improve the temperature measurement sensitivity of fluorescence intensity ratio technology in high temperature range by using double luminescence center strategy

A technology of fluorescence intensity ratio and luminescent center, which is applied in thermometers, measuring heat, measuring devices, etc., to achieve the effect of improving temperature measurement accuracy and relative sensitivity

Active Publication Date: 2019-10-08
黑龙江省工研院资产经营管理有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that it is difficult to achieve high-precision temperature measurement in a higher temperature range by using the traditional fluorescence intensity ratio temperature measurement technology, and to provide a method for improving the sensitivity of thulium ion near-infrared up-conversion fluorescence temperature measurement

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  • A method to improve the temperature measurement sensitivity of fluorescence intensity ratio technology in high temperature range by using double luminescence center strategy
  • A method to improve the temperature measurement sensitivity of fluorescence intensity ratio technology in high temperature range by using double luminescence center strategy
  • A method to improve the temperature measurement sensitivity of fluorescence intensity ratio technology in high temperature range by using double luminescence center strategy

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specific Embodiment approach 1

[0021] Specific implementation mode 1: In this implementation mode, a method for improving the temperature measurement sensitivity of the fluorescence intensity ratio technology in the high temperature range by using the double luminescence center strategy is carried out according to the following steps:

[0022] 1. Preparation of Yb 3+ -Tm 3+ -Er 3+ ion-codoped NaYF 4 Nano crystals are then pressed into tablets to obtain temperature measurement samples;

[0023]2. Put the temperature measurement sample into the hot and cold stage, use a 980nm near-infrared laser diode as the excitation light source, and use Er in the temperature range of 298 to 350K 3+ of 2 h 11 / 2 - 4 I 15 / 2 and 4 S 3 / 2 - 4 I 15 / 2 The fluorescent band is temperature-calibrated to obtain the temperature calibration curve A; in the high temperature range of 350K-448K, Er 3+ of 4 S 3 / 2 - 4 I 15 / 2 and Tm 3+ of 3 f 3 - 3 h 6 The fluorescent band generated by the transition is temperature-calib...

specific Embodiment approach 2

[0028] Specific embodiment two: the difference between this embodiment and specific embodiment one is: Yb in step one 3+ -Tm 3+ -Er 3 + ion-codoped NaYF 4 The preparation method of nanocrystals is solvothermal method. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0029] Specific implementation mode three: the difference between this implementation mode and specific implementation mode one or two is: Yb in step one 3+ -Tm 3 + -Er 3+ Ion-codoped nanocrystalline NaYF 4 The preparation method specifically comprises the following steps:

[0030] (1) Under the condition of continuous magnetic stirring and nitrogen protection gas in the whole process, 0.79mmol YbCl 3 ·6H 2 O, 0.2mmol YbCl 3 ·6H 2 O and, 0.005mmol TmCl 3 ·6H 2 O and 0.005 mmol ErCl 3 ·6H 2 O was added to a 50mL round-bottom three-necked flask, and 6mL of oleic acid and 10mL of octadecene solvent were added, then the three-necked flask was sealed and heated to 160°C for 1h;

[0031] (2) Mix 6mmol NaOH and 4mmol NH 4 Add F into a glass sample bottle containing 20mL of methanol solution, and continue magnetic stirring at a temperature of 50°C for 0.5h to obtain a mixed solution A;

[0032] (3) Cool the three-neck flask in step (1) to 50°C, and add the mixed solution ...

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Abstract

The invention relates to a method for improving the temperature measurement sensitivity of the fluorescence intensity ratio technology in the high temperature range by utilizing a double luminescence center strategy. The purpose of the present invention is to solve the problem that it is difficult to realize high-precision temperature measurement in a higher temperature range by using traditional fluorescence intensity ratio temperature measurement technology. Method: (1) prepare temperature measurement samples; (2) at low temperature Interval utilizes traditional Er 3+ of 2 h 11 / 2 - 4 I 15 / 2 and 4 S 3 / 2 - 4 I 15 / 2 The fluorescent band is used for temperature measurement, and the Er is used in the high temperature range 3+ of 4 S 3 / 2 - 4 I 15 / 2 and Tm 3+ of 3 f 3 - 3 h 6 The fluorescent band generated by the transition is used for temperature measurement; the present invention utilizes the dual luminescence center strategy to effectively improve the temperature measurement sensitivity of the fluorescence intensity ratio technology in a higher temperature range, and the present invention is applied to the field of rare earth fluorescence temperature measurement.

Description

technical field [0001] The invention relates to a method for improving the temperature measurement sensitivity of the fluorescence intensity ratio technology in the high temperature range by using a double luminescence center strategy. Background technique [0002] As the most basic physical quantity, temperature plays an important role in various fields. Traditional temperature sensors are limited in more and more fields, so non-contact optical sensors have emerged. Among them, fluorescence intensity ratio technology has attracted attention due to its strong anti-interference. [0003] The traditional fluorescence intensity ratio temperature measurement technology is based on the thermally coupled energy level pairs of rare earth ions. The relationship between the fluorescence intensity ratio and temperature can be described by the following Boltzmann thermal statistical distribution theory: Δ=Aexp(-ΔE / kT), where Δ is the integral intensity ratio of the two fluorescent be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/32
CPCG01K11/32
Inventor 张治国李磊朋秦峰赵华郑仰东
Owner 黑龙江省工研院资产经营管理有限公司
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