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A tungstate-based photothermal conversion temperature measurement material and its preparation method and application

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: 2022-07-01
TONGJI UNIV
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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

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  • A tungstate-based photothermal conversion temperature measurement material and its preparation method and application
  • A tungstate-based photothermal conversion temperature measurement material and its preparation method and application
  • A tungstate-based photothermal conversion temperature measurement material and its preparation method and application

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Embodiment 1～6

[0037] Embodiments 1 to 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 steps of the above-mentioned embodiment include the following steps:

[0042] (1) Selection of raw materials: Li is selected during preparation 2 CO 3 (purity 99.99%), CaCO 3 (purity 99.99%), WO 3 (99% purity), Er 2 O 3 (purity 99.9%), La 2 O 3 (purity 99.99%), Yb 2 O 3 (99.99% purity), 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 the agate mortar, add an appropriate amount of anhydrous ethanol, stir, mix and grind for 1 to 2 hours until fully mixed;

[0043] (2) The uniformly ground powder was placed in a corundum crucible, gradually heated to 1000°C at a heating rate of 3°C / min in air, sintered at high temperature for 4 hours, and cooled ...

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Abstract

The invention relates to a tungstate-based photothermal conversion temperature measurement material and a preparation method and application thereof. The material is composed of rare earth ions Er 3+ is an activator, X is a sensitizer, and its chemical structure expression is LiCaX (WO 4 ) 3 : yEr, where X is La, Yb, Nd or Yb / Nd, 0≤y≤0.05, y is the molar content. Compared with the prior art, the present invention utilizes Er 3+ / Yb 3+ / Nd 3+ Tri-doped suitable tungstate host material with Er 3+ The fluorescence intensity ratio of the thermally coupled energy level is used for thermometry while binding Nd 3+ Under the excitation of near-infrared excitation light, micro-area heating and temperature self-measurement functions are realized. The synthesis process is very simple, the preparation cycle is short, and large-scale industrial production can be realized.

Description

technical field [0001] The invention belongs to the field of optical temperature sensing materials, and relates to a tungstate-based photothermal conversion temperature measurement 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 thermal motion of the molecules of an object, and can only be measured indirectly through certain properties of the object that change with temperature. Under the needs of technology and production and life, a large number of contact and non-contact temperature measurement modes have been developed and applied. In recent years, non-contact temperature measurement modes based on optical properties have shown 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 and can only rec...

Claims

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Application Information

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Patent Type & Authority Patents(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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