Phosphate near-infrared luminescent temperature measurement material and preparation method thereof

A phosphate and near-infrared technology, used in luminescent materials, chemical instruments and methods, etc., can solve problems such as damage to samples and temperature changes, and achieve the effects of stable chemical properties, easy grinding, and high photoconversion efficiency.

Active Publication Date: 2021-12-07
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this case, they need to be in direct contact with the s

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  • Phosphate near-infrared luminescent temperature measurement material and preparation method thereof
  • Phosphate near-infrared luminescent temperature measurement material and preparation method thereof
  • Phosphate near-infrared luminescent temperature measurement material and preparation method thereof

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Embodiment 1

[0032] The raw material is SrCO 3 (analytical pure), Li 2 CO 3 (analytical pure), Cr 2 o 3 (99.99%) and NH 4 h 2 PO 4(Analytical pure), the molar ratio between them is 1.994:0.0015:0.0015:2, weigh the raw materials according to the above ratio, mix them and place them in a corundum crucible, pre-fire at 600°C for 5 hours, and cool to room temperature Grind it again, put it into a high-temperature furnace, bake it at 1100°C for 3 hours in a CO atmosphere, and cool it down to room temperature naturally to obtain a luminescent temperature-measuring powder. The obtained luminescent temperature measuring powder is a white powder with a molecular formula of Sr 1.994 Li 0.003 P 2 o 7 :0.003Cr 3+ , under the excitation of 488nm blue light, its emission spectrum consists of a broadband emission with a main peak at 840nm and a half-maximum width of 140nm, such as figure 1 As shown; with the increase of temperature, the peak intensity decreased sharply, as figure 2 Shown; T...

Embodiment 2

[0034] The raw material is SrCO 3 (analytical pure), Li 2 CO 3 (analytical pure), Cr 2 o 3 (99.99%) and NH 4 h 2 PO 4 (Analytical pure), the molar ratio between them is 1.994:0.0015:0.0015:2, weigh the raw materials according to the above ratio, mix them and place them in a corundum crucible, pre-fire at 700°C for 5 hours, and cool to room temperature Grind it again, put it into a high-temperature furnace, bake it at 1100°C for 3 hours in a CO atmosphere, and cool it down to room temperature naturally to obtain a luminescent temperature-measuring powder. The obtained luminescent temperature measuring powder is a white powder with a molecular formula of Sr 1.994 Li 0.003 P 2 o 7 :0.003Cr 3+ , under the excitation of 488nm blue light, its emission spectrum consists of a broadband emission with a main peak at 840nm and a half-maximum width of 140nm. The peak intensity decreased sharply with increasing temperature. The integral area of ​​the emission peak changes line...

Embodiment 3

[0036] The raw material is SrCO 3 (analytical pure), Li 2 CO 3 (analytical pure), Cr 2 o 3 (99.99%) and NH 4 h 2 PO 4 (analytical pure), the molar ratio between them is 1.994:0.0015:0.0015:2, weigh the raw materials according to the above ratio, mix them and place them in a corundum crucible, pre-fire at 900°C for 5 hours, and cool to room temperature Grind it again, put it into a high-temperature furnace, bake it at 1100°C for 3 hours in a CO atmosphere, and cool it down to room temperature naturally to obtain a luminescent temperature-measuring powder. The obtained luminescent temperature measuring powder is a white powder with a molecular formula of Sr 1.994 Li 0.003 P 2 o 7 :0.003Cr 3+ , under the excitation of 488nm blue light, its emission spectrum consists of a broadband emission with a main peak at 840nm and a half-maximum width of 140nm. The peak intensity decreased sharply with increasing temperature. The integral area of ​​the emission peak changes line...

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Abstract

The invention provides a phosphate near-infrared luminescent temperature measurement material. The molecular formula of the material is A2(1-x)DxP2O7:xCr<3+>; the A is selected from one or more of Mg, Zn, Ca, Sr and Ba; the D is selected from one or more of Li, Na and K; and 0.0005 <= x <= 0.05. The invention provides the monovalent metal ion co-doped light-emitting temperature measurement material which takes phosphate as a matrix and Cr<3+> ions as a light-emitting center. Compared with the prior art, the luminescent temperature measurement material provided by the invention can be effectively excited by blue light, has high light conversion efficiency and good luminescence detectability, and the temperature measurement precision can reach 1.29%/K in a range of 300K to 400K; and meanwhile, the luminescent temperature measurement material is simple in preparation process, low in raw material cost, stable in chemical property, fluffy, very easy to grind, free of radioactivity and free of harm to the environment.

Description

technical field [0001] The invention relates to the technical field of luminescent temperature-measuring materials, in particular to a phosphate near-infrared luminescent temperature-measuring material and a preparation method thereof. Background technique [0002] In recent years, due to the traditional contact thermometers, including thermal expansion, thermistors, thermocouples, and glass liquid thermometers, sufficient heat convection between the object and the thermometer is required for temperature measurement. In this case, they need to come into direct contact with the sample, which can damage the sample or alter its temperature. On the contrary, non-contact thermometers have the advantages of long-distance and stable use in electromagnetic, acid corrosion, and thermal environments, which makes non-contact temperature measurement technology based on fluorescent materials attract extensive attention. At present, fluorescent temperature sensing technology has become a...

Claims

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Application Information

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IPC IPC(8): C09K11/70
CPCC09K11/701
Inventor 李成宇焦升建庞然李达姜丽宏张粟
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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