Fluorescent material, preparation method thereof and method for measuring temperature

A fluorescent material and energy technology, which is applied in the direction of luminescent materials, thermometers, measuring devices, etc., can solve the problems of rare and unfavorable rapid temperature measurement and analysis, and achieve the effects of improved accuracy, scientific and reasonable preparation method, and good effect

Inactive Publication Date: 2018-08-28
NORTHEAST DIANLI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the fluorescence change of the currently developed fluorescence temperature measurement equipment may be affected by factors such as the excitation source and the detector, resulting in the need to correct each time it is used; at the same time, for temperature measurement that relies on the intensity ratio between fluorescence peak As far as the equipment is concerned, since the intensity ratio between the fluorescence peaks and the temperature change is nonlinear, it is not conducive to the rapid measurement and analysis of temperature; in addition, the working temperature range of these fluorescence temperature measurement equipment is mainly limited to above 273K, for 10-273K Measurements in the cryogenic range are less common
Therefore, providing a fluorescent temperature measurement material that can realize rapid and accurate temperature measurement in a wide temperature range and has self-calibration characteristics has become a difficult problem that those skilled in the art have been eager to solve, but have not yet solved.

Method used

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  • Fluorescent material, preparation method thereof and method for measuring temperature
  • Fluorescent material, preparation method thereof and method for measuring temperature
  • Fluorescent material, preparation method thereof and method for measuring temperature

Examples

Experimental program
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example 1

[0032] Example 1: The chemical formula is Nd 0.02 Gd 0.98 TaO 4 Preparation of fluorescent materials

[0033] Weigh 0.0418g of Nd 2 o 3 , 2.2096g of Gd 2 o 3 and 2.7485g of Ta 2 o 5 Mix the high-purity powder, dissolve in an appropriate amount of hot concentrated dilute nitric acid to form a nitrate solution; slowly drop the prepared solution together with ammonia water into an ammonia solution with a pH value of about 9.5 to form a precipitate, while stirring continuously, and Detect the pH value of the precipitate solution and make it stable at 8–10; continue to stir for 1 hour after the solution is completely precipitated, then use a centrifuge to separate the precipitate from the solution, then wash the precipitate with deionized water, and repeat multiple times until addition of Al to the separated filtrate 3+ After ionization, no white precipitate is produced; use an oven to dry the precipitate at a temperature of 120°C, and finally place the precipitate at a te...

example 2

[0034] Example 2: The chemical formula is Nd 0.02 Gd 0.98 TaO 4 Application of fluorescent materials

[0035] The chemical formula is Nd when irradiated with laser light with a wavelength of 532nm 0.02 Gd 0.98 TaO 4 Phosphor powder; use a spectrometer to observe the Nd 3+ ion 4 f 3 / 2 Two thermally coupled sublevels of the energy level (R 2 and R 1 )Towards 4 I 9 / 2 The highest energy sub-level of the energy level (Z 5 ) transition, such as figure 1 and figure 2 As shown, two fluorescent peaks are formed, and the intensity ratio of the two fluorescent peaks is calculated; then and image 3 Comparing the given linear graphs, the temperature of the environment where the fluorescent material is located can be obtained.

example 3

[0036] Example 3: The chemical formula is Nd 0.02 Gd 0.98 TaO 4 Application of fluorescent materials

[0037] The chemical formula is Nd when irradiated with laser light with a wavelength of 532nm 0.02 Gd 0.98 TaO 4 Fluorescent material; Utilize the method in the example 2 to determine the ambient temperature initial value T 0 ; Then measure the Nd in the material with a spectrometer 3+ ion 4 f 3 / 2 The lowest energy sublevel of the energy level (R 1 )Towards 4 I 9 / 2 The highest energy sub-level of the energy level (Z 5 ) transition, such as figure 1 and figure 2 The peak energy change △E of the fluorescence peak shown; then use △E to divide by Figure 5 The slope value shown in is 3.32μeV / K, and the temperature change △T can be obtained; in addition, △T+T can be used 0 Get the actual temperature of the environment.

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Abstract

The invention relates to a fluorescent material, a preparation method thereof and a method for measuring temperature. The chemical formula of the material is Nd0.02Gd0.98TaO4, wherein two thermal coupling sub energy levels of the Nd3+ ion 4F3/2 energy level jump to the highest energy sub energy level of the 4I9/2 energy level to form two independent fluorescent peaks, which is beneficial to the observation of fluorescence signals; the peak intensity ratio of the two fluorescent peaks changes significantly with temperature, and sensitivity is higher in a wider temperature range; blue shift occurs in the energy of the fluorescent peaks in which the the lowest sub energy level of the Nd3+ ion 4F3/2 energy level jumps to the highest energy sub energy level of the 4I9/2 energy level as the temperature increases, and peak position change and temperature change can maintain a very good linear relationship in the temperature range of 40-600K; the method has good temperature sensitivity and wide application prospects.

Description

technical field [0001] The invention relates to the technical field of luminescent materials and temperature measurement, and relates to a fluorescent material, a preparation method thereof and a method for measuring temperature. Background technique [0002] Temperature is an extremely important physical parameter. In order to measure temperature, people have invented various forms of temperature measuring devices. The more common temperature measuring devices are: thermocouple, thermal resistance, mercury and alcohol thermometers, etc. When using these devices to measure temperature, they need to be in contact with the object to be measured, which will limit their use and cannot meet the temperature measurement needs of some special occasions, such as high-voltage power stations, corrosive gas environments, fire sites or to be measured The case where the object is moving at high speed, etc. In contrast, non-contact temperature measurement is used in a wider range and can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78C01G35/00G01K11/32
CPCG01K11/32C09K11/7769C01G35/006
Inventor 周鹏宇刘鲍韩丹丹张宇董晓瑞郭振东赵磊迟凯粼
Owner NORTHEAST DIANLI UNIVERSITY
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