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High-sensitivity up-conversion temperature measurement material as well as preparation method and application thereof

A technology with high sensitivity and the environment to be tested is applied in the field of high-sensitivity up-conversion temperature measurement materials and their preparation. It can solve the problems of large errors in optical temperature measurement materials and low luminous intensity, and achieve improved measurement accuracy and signal-to-noise ratio, the effect of reduced dependence on

Active Publication Date: 2019-10-15
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a high-sensitivity up-conversion temperature-measuring material and its preparation method to solve the problems of large errors and low luminous intensity in existing optical temperature-measuring materials

Method used

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  • High-sensitivity up-conversion temperature measurement material as well as preparation method and application thereof
  • High-sensitivity up-conversion temperature measurement material as well as preparation method and application thereof
  • High-sensitivity up-conversion temperature measurement material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] 1) Weigh 1.4763g of solid powdered strontium carbonate, 3.9845g of solid powdered lutetium oxide, 0.3941g of solid powdered ytterbium oxide and 0.0956g of solid powdered erbium oxide, and place the above-mentioned raw materials in an agate mortar and thoroughly grind and mix them for 1 hour to obtain a mixture, It is then poured into a corundum crucible and covered;

[0034] 2) Place the corundum crucible in step 1) in a high-temperature furnace, heat it to 1300°C, and heat it at a constant temperature for 6 hours. After the reaction, cool it down to room temperature naturally, and then put the burnt sample into an agate mortar and grind it into powder. That is, the up-conversion phosphor SrLu is obtained 2 o 4 : 5% Er 3+ / 20%Yb 3+ .

[0035] The up-conversion phosphor SrLu prepared in this embodiment 2 o 4 : 5% Er 3+ / 20%Yb 3+ The X-ray diffraction technique was used to analyze the results as follows: figure 1 shown.

[0036] From figure 1 It can be seen tha...

Embodiment 2

[0038] 1) Weigh 1.0009g of solid powdered calcium carbonate, 3.9845g of solid powdered lutetium oxide, 0.3941g of solid powdered ytterbium oxide and 0.0956g of solid powdered erbium oxide, and place the above-mentioned raw materials in an agate mortar and thoroughly grind and mix them for 1 hour to obtain a mixture. It is then poured into a corundum crucible and covered;

[0039] 2) Place the corundum crucible in step 1) in a high-temperature furnace, heat it to 1300°C, and heat it at a constant temperature for 6 hours. After the reaction, cool it down to room temperature naturally, and then put the burnt sample into an agate mortar and grind it into powder. That is, the up-conversion phosphor CaLu 2 o 4 :5%Er 3+ / 20%Yb 3+ .

Embodiment 3

[0041] 1) Weigh 1.9734g of solid powdered barium carbonate, 3.9845g of solid powdered lutetium oxide, 0.3941g of solid powdered ytterbium oxide and 0.0956g of solid powdered erbium oxide, and place the above-mentioned raw materials in an agate mortar and thoroughly grind and mix them for 1 hour to obtain a mixture, It is then poured into a corundum crucible and covered;

[0042] 2) Place the corundum crucible in step 1) in a high-temperature furnace, heat it to 1300°C, and heat it at a constant temperature for 6 hours. After the reaction, cool it down to room temperature naturally, and then put the burnt sample into an agate mortar and grind it into powder. That is, the up-conversion phosphor BaLu 2 o 4 :5%Er 3+ / 20%Yb 3+ .

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Abstract

The invention discloses a high-sensitivity up-conversion temperature measurement material as well as a preparation method and application thereof. The general structural formula is MA2O4: xEr<3+> / yYb<3+>, wherein M is selected from Ca, Sr or Ba, and A is selected from La or Lu; x: y is equal to (1-15):20. The material adopts laser of 980nm as an excitation light source, and emits emission peaks ofthermally coupled energy levels at 540 nm and 552 nm respectively. By utilizing the fact that the number of particles on the thermally coupled energy levels of rare earth ions follows the Boltzmann distribution law, the layout of the number of particles and the temperature have a quantitative relationship, so that the measurement of actual temperature is realized. The method is extremely small inerror and high in sensitivity, effectively realizes fast response and real-time monitoring of subtle changes of the temperature, also has the advantages of simple preparation, ready availability of the raw materials, stability, reliability, low cost and the like, and is suitable for being widely applied and popularized.

Description

technical field [0001] The invention relates to the technical field of temperature measurement of rare earth up-conversion luminescent materials, in particular to a high-sensitivity up-conversion temperature-measuring material and its preparation method and application. Background technique [0002] Temperature is one of the important parameters to determine the state of matter, and its measurement and control play a very important role in national defense, military affairs, scientific experiments, and industrial and agricultural production. In particular, pyrometry plays an extremely important role in aerospace, materials, energy, metallurgy and other fields. At present, the most widely used temperature measurement components are thermocouples and thermal resistances, but the above-mentioned traditional methods are all contact temperature measurement methods, which are easily affected by the measurement environment, and their dynamic and real-time performance are poor, resu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78G01K11/20
CPCC09K11/7768G01K11/20
Inventor 金叶罗旭
Owner CHONGQING UNIV OF TECH
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