A dual-phase glass-ceramic for fluorescent temperature probes and its preparation method

A glass-ceramic, crystal phase technology, applied in thermometers, thermometers with physical/chemical changes, instruments, etc., can solve the problems of high cost, easy scattering of phosphors, complex crystal preparation process, etc.

Active Publication Date: 2020-12-29
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the phosphor powder is easy to scatter, resulting in inaccurate temperature measurement; and the crystal preparation process is complicated, and it takes a lot of time and high cost

Method used

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  • A dual-phase glass-ceramic for fluorescent temperature probes and its preparation method
  • A dual-phase glass-ceramic for fluorescent temperature probes and its preparation method
  • A dual-phase glass-ceramic for fluorescent temperature probes and its preparation method

Examples

Experimental program
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Effect test

example 1

[0037] Example 1: The pure P 2 o 5 , SiO 2 、Al 2 o 3 、Cs 2 CO 3 , PbBr 2 , SrCO 3 , NaBr, EuCl 3 Powder, according to 30P 2 o 5 ;20SiO2 2 ;10Al 2 o 3 ;10Cs 2 CO 3 ;10PbBr 2 ;5SrCO 3 ; 5NaBr; 10EuCl 3 (molar ratio) is weighed, mixed in an agate ball mill jar and fully ground evenly, then placed in an alumina crucible, placed in a resistance furnace and heated to 1000 ° C, and kept for 2 hours to melt, and then The molten liquid is quickly poured into the mold to form, and the block glass ceramics is obtained by self-crystallization. Finally, the obtained glass ceramics are placed in a resistance furnace and annealed at 200°C to eliminate internal stress. After cooling with the furnace, cut into Lumpy, get CsPbBr 3 / EuPO 4 Twin phase glass ceramics.

[0038] X-ray diffraction data indicate precipitation of CsPbBr in the glass matrix 3 and EuPO 4 crystal phase (eg figure 1 shown). Scanning electron micrographs show that CsPbBr 3 and EuPO 4 The distribut...

example 2

[0039] Example 2: The pure P 2 o 5 , SiO 2 、Al 2 o 3 、Cs 2 CO 3 , PbBr 2 , EuCl 3 Powder, according to 20P 2 o 5 ;20SiO2 2 ;10Al 2 o 3 ;20Cs 2 CO 3 ;20PbBr 2 ;10EuCl 3 (molar ratio) is weighed, mixed in an agate ball mill jar and fully ground evenly, then placed in an alumina crucible, placed in a resistance furnace and heated to 1300 ° C, and kept for 2 hours to melt, then, the The molten liquid is quickly poured into the mold to form it, and the block glass ceramics is obtained by self-crystallization. Finally, the obtained glass ceramics are placed in a resistance furnace, annealed at 200°C to eliminate internal stress, cooled with the furnace, and cut into pieces. shape, get CsPbBr 3 / EuPO 4 Twin phase glass ceramics. Testing the temperature-variable emission spectra of bimorph glass-ceramics and using Eu 3+ at 611 nm and CsPbBr 3 The fluorescence intensity ratio of the two peaks at 516 nm is used as the temperature detection signal, and the highest ab...

example 3

[0040] Example 3: The pure P 2 o 5 、Al 2 o 3 、Cs 2 CO 3 , PbBr 2 , NaBr, EuCl 3 Powder, according to 40P 2 o 5 ;5Al 2 o 3 ;15Cs 2 CO 3 ;10PbBr 2 ; 10NaBr; 20EuCl 3 (molar ratio) is weighed, mixed in an agate ball mill jar and fully ground evenly, then placed in an alumina crucible, placed in an electric resistance furnace and heated to 900 ° C, and kept for 4 hours to melt, then, the The molten liquid is quickly poured into the mold to form, and the block glass ceramics is obtained by self-crystallization. Finally, the obtained glass ceramics are placed in a resistance furnace, and annealed at 300 ° C to eliminate internal stress. After cooling with the furnace, cut into Lumpy, get CsPbBr 3 / EuPO 4 Twin phase glass ceramics. Testing the temperature-variable emission spectra of bimorph glass-ceramics and using Eu 3+ at 611 nm and CsPbBr 3 The fluorescence intensity ratio of the two peaks at 516 nm is used as the temperature detection signal, and the highest a...

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Abstract

The invention provides a glass ceramic comprising a CsPbBr3 crystalline phase and a EuPO4 crystalline phase and a preparation technique of the glass ceramic, the glass ceramic can detect the temperature efficiently. The glass components in the glass ceramic are as follows by percent (mol%): 10-60 mol% of P2O5, 0-40 mol% of SiO2, 0-40 mol% of Al2O3, 0-30 mol% of Cs2CO3, 0-30 mol% of PbBr2, 0-30 mol% of SrCO3, 5-30 mol% of NaBr, 5-30 mol% of EuCl3, and the sum of the moles of the above components is 100 mol%. The invention further provides the preparation technique of the glass ceramic. The fluorescence intensity ratio of a red light emitting zone of Eu3<+> on 611 nm to a green light emitting zone of CsPbBr3 on 516 nm is obviously changed with the temperature, and the temperature is detectedwithin certain range of temperature. The highest absolute sensitivity of the CsPbBr3 / EuPO4 double-phase glass ceramic reaches 0.082 k<-1> within the temperature range of 303-483 K, and the highest relative sensitivity reaches 1.8%K<-1>. Moreover, the material is excellent in thermal stability, and can be repeatedly recycled. Therefore, the CsPbBr3 / EuPO4 double-phase glass ceramic is a fluorescenttemperature probe material capable of detecting the temperature efficiently.

Description

technical field [0001] The invention relates to the field of solid luminescent materials, in particular to a dual crystal phase glass ceramic that can be applied to a fluorescent temperature probe and a preparation process thereof. Background technique [0002] Temperature is the most fundamental thermodynamic parameter, which plays an important role in industrial and scientific applications. The traditional temperature measurement method needs to be in contact with the object to be measured, representatively there are thermometers, thermocouples and so on. However, this kind of contact temperature measurement will change the actual temperature of the object, which may easily cause inaccurate temperature measurement. In addition, the effect of testing small objects and fast-moving objects is not satisfactory. Recently, fluorescent intensity-ratio-based temperature probe materials have received widespread attention. This type of fluorescent material is non-contact, has high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/16C03C10/02C03B32/02G01K11/20
CPCC03B32/02C03C10/00G01K11/20
Inventor 王聪勇林航王元生
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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