Tungstate-based photothermal conversion temperature measurement material and preparation method and application thereof

A photothermal conversion, tungstate technology, applied in luminescent materials, chemical instruments and methods, thermometers, etc., can solve the problems of difficult large-scale production and application, complicated preparation process, slow heating rate, etc., to achieve non-toxic raw materials, preparation Process cleaning and reduced energy consumption

Active Publication Date: 2021-04-30
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently studied up-conversion photothermal conversion temperature measurement materials have a slow heating rate and a narrow temperature range, such as KLu(WO 4 ) 2 :Ho 3+ / Tm 3+ Nanocrystal 20s raised 15K, Er 3+ / Yb 3+ :GdVO 4 @SiO 2 The core-shell nanostructure rises to 11K in 60s, and the core-shell structure has the disadvantage of complicated preparation process, which makes it difficult to realize large-scale production and application

Method used

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  • Tungstate-based photothermal conversion temperature measurement material and preparation method and application thereof
  • Tungstate-based photothermal conversion temperature measurement material and preparation method and application thereof
  • Tungstate-based photothermal conversion temperature measurement material and preparation method and application thereof

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Embodiment 1～6

[0037] Examples 1-6 in the present invention adopt the same preparation process steps, and the specific chemical equations are shown in Table 1.

[0038] Table 1

[0039]

[0040]

[0041]The preparation process step of above-mentioned embodiment comprises the following steps:

[0042] (1) Select raw materials: select Li during preparation 2 CO 3 (purity 99.99%), CaCO 3 (purity 99.99%), WO 3 (purity 99%), Er 2 o 3 (purity 99.9%), La 2 o 3 (purity 99.99%), Yb 2 o 3 (purity 99.99%), and Nd 2 o 3 (purity 99.9%) as the raw material, weigh the raw material strictly according to its chemical formula, then place all the raw materials in an agate mortar, add an appropriate amount of absolute ethanol, stir, mix and grind for 1 to 2 hours until fully mixed;

[0043] (2) Place the uniformly ground powder in a corundum crucible, gradually raise the temperature to 1000°C at a heating rate of 3°C / min in air, sinter at high temperature for 4 hours, and cool down to 600°C at...

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Abstract

The invention relates to a tungstate-based photo-thermal conversion temperature measurement material and a preparation method and application thereof, the tungstate-based photo-thermal conversion temperature measurement material takes rare earth ions Er < 3 + > as an activator and X as a sensitizer, the chemical structural expression is LiCaX (WO4) 3: yEr, X is La, Yb, Nd or Yb / Nd, 0 < = y < = 0.05, and y is molar content. Compared with the prior art, the Er < 3 + > / Yb < 3 + > / Nd < 3 + > tri-doped appropriate tungstate matrix material is utilized, the fluorescence intensity ratio of the thermal coupling energy level of Er < 3 + > is used for temperature measurement, meanwhile, the photothermal conversion effect of Nd < 3 + > is combined, micro-area heating and temperature self-measurement functions are achieved under excitation of near-infrared excitation light, and synthesis process operation is very simple; and large-scale industrial production can be achieved.

Description

technical field [0001] The invention belongs to the field of optical temperature sensing materials, and relates to a tungstate-based light-to-heat conversion temperature-measuring material and a preparation method and application thereof. Background technique [0002] As the most basic physical quantity in natural science, temperature reflects the intensity of the molecular thermal motion of an object, and can only be measured indirectly through certain characteristics of objects that change with temperature. Under the needs of science and technology and production and life, a large number of contact and non-contact temperature measurement modes have been developed and applied. In recent years, the non-contact temperature measurement mode based on optical properties has shown its unique advantages and flourished. For example, infrared detection technology has been widely used in industrial production, equipment maintenance and other fields, but its spatial resolution is low,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78G01K11/20
CPCC09K11/7756C09K11/7708C09K11/7776G01K11/20
Inventor 王旭升赵延胡锐李艳霞
Owner TONGJI UNIV
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