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A highly sensitive temperature measurement method based on near-infrared fluorescence of different rare earth ions

A high-sensitivity, rare-earth ion technology, applied in the field of rare-earth element fluorescence temperature measurement, can solve the problems of difficult signal processing, difficult division of fluorescent bands, and large measurement errors

Active Publication Date: 2020-09-15
南京力通达电气技术有限公司
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Problems solved by technology

[0004] Usually the fluorescence intensity ratio thermometry method uses Er 3+ Ionic 2 h 11 / 2 and 4 S 3 / 2 The fluorescence intensity ratio of the two energy levels is used to measure the temperature. Since the two fluorescent bands partially overlap, the division of the two fluorescent bands becomes difficult.
Therefore, the signal processing is difficult and the measurement error is large
At the same time, the low luminous efficiency of up-conversion fluorescence thermometry further limits the development of fluorescence thermometry technology.
Therefore, it is a good idea to use the down-conversion fluorescence temperature measurement with two fluorescence bands that do not overlap.

Method used

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  • A highly sensitive temperature measurement method based on near-infrared fluorescence of different rare earth ions
  • A highly sensitive temperature measurement method based on near-infrared fluorescence of different rare earth ions
  • A highly sensitive temperature measurement method based on near-infrared fluorescence of different rare earth ions

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Embodiment 1

[0035] This embodiment discloses a high-sensitivity temperature measurement method based on near-infrared fluorescence of different rare earth ions, including the following steps:

[0036] Step 1. Accurately weigh Na on an electronic balance according to the molar ratio (mol%) of 100:400:88:10:2 2 CO 3 、WO 3 , Y 2 o 3 , Yb 2 o 3 and Nd 2 o 3 , and pour 5 kinds of drugs into the agate mortar body, mix and grind them evenly with a grinding rod (about 30min), then pour the mixed powder into a crucible and place it in a Si-C high-temperature furnace, and heat it at 1000°C for 4 After one hour, take out the crucible after the heating furnace is naturally cooled to room temperature, and NaY(WO 4 ) 2 : Yb 3+ / Nd 3+ Phosphor (Phosphor 1). At the same time, use the same method above to accurately weigh Na according to the ratio of 100:400:99:1. 2 CO 3 、WO 3 , Y 2 o 3 、Er 2 o 3 , accurately weigh Na according to the ratio of 100:400:87:10:2:1 2 CO 3 、WO 3 , Y 2 o ...

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Abstract

The invention discloses a high-sensitivity temperature measurement method based on near-infrared fluorescence of different rare earth ions. By measuring different temperatures, Nd 3+ ions around 710nm‑920nm and Er 3+ The near-infrared light of ions near 1400nm‑1700nm compares the fluorescence intensities of the two bands to obtain the functional relationship between FIR and temperature. When the sample is placed in the environment to be tested, the fluorescence intensity ratio is calculated, and the temperature of the environment to be tested is obtained by using the above functional relationship. The two temperature-measuring light bands used in the present invention come from non-thermally coupled energy levels without any overlap, which facilitates data processing. At the same time, Er 3+ The infrared light belongs to the down-conversion process, the quantum yield is high, the pumping power of the required laser is small, and higher fluorescence intensity can be obtained. At the same time, the two fluorescence intensities have opposite trends with temperature. Compared with the result that the intensities of the two fluorescence bands used in the current technology have the same or close variation with temperature, the temperature measurement sensitivity of the present invention is greater.

Description

technical field [0001] The invention relates to the field of rare earth element fluorescence temperature measurement, and specifically adopts a rare earth element near-infrared fluorescence intensity ratio method for temperature measurement. Background technique [0002] As one of the important parameters of thermodynamics, temperature not only occupies an important position in academic research, but also plays a vital role in industrial manufacturing, medical medicine and other aspects. Therefore, rapidity and accuracy have gradually become important technical indicators for measuring temperature measurement technology. At present, the temperature measurement methods are mainly divided into contact temperature measurement and non-contact temperature measurement. Contact temperature sensors represented by thermocouples and thermal resistances are limited by their temperature measurement methods. In the process of heat transfer to the sensor, the inevitable heat loss increas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/32
CPCG01K11/3213
Inventor 徐伟朱昕赵迪
Owner 南京力通达电气技术有限公司
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