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Luminescent material, preparation method thereof and multiband optical temperature sensor

A technology of luminescent materials and ions, which is applied in the field of optical materials, can solve problems such as the absence of luminescent materials, achieve the effects of broadening the spectral range, broadening the spectral detection range, and reducing cross relaxation

Active Publication Date: 2022-03-08
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there is no luminescent material with multiple spectra and multi-segment sensitive temperature properties

Method used

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  • Luminescent material, preparation method thereof and multiband optical temperature sensor
  • Luminescent material, preparation method thereof and multiband optical temperature sensor
  • Luminescent material, preparation method thereof and multiband optical temperature sensor

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Embodiment 1

[0047] The embodiment of the present application provides the first luminescent material, and its preparation method includes the following steps:

[0048] 1. Mix ytterbium nitrate pentahydrate, erbium nitrate pentahydrate, niobium pentoxide, lithium hydroxide monohydrate with water, then add ethylene glycol to obtain the first mixed solution; the volume ratio of water and ethylene glycol is 1: 2;

[0049] 2. Transfer the first mixed solution to a reaction kettle, ball mill for 8 hours, react at 250°C for 12 hours, separate, and dry to obtain a white powder that is calcined at 950°C for 1 hour to obtain erbium ion-doped ytterbium niobate nanocrystals (core YbNbO 4 :Er 3+ );

[0050] 3. Mix ytterbium nitrate pentahydrate, thulium nitrate pentahydrate, niobium pentoxide, lithium hydroxide monohydrate and erbium ion-doped ytterbium niobate nanocrystals with water, and then add ethylene glycol to obtain a second mixed solution;

[0051] 4. Transfer the second mixed solution to ...

Embodiment 2

[0059] The embodiment of the present application provides a second luminescent material, the preparation method of which includes the following steps:

[0060] 1. The first luminescent material (YbNbO 4 :Er 3+ @YbNbO 4 :Tm 3+ ), ytterbium nitrate pentahydrate, europium nitrate pentahydrate, niobium pentoxide and lithium hydroxide monohydrate are dissolved in water, and then ethylene glycol is added to obtain the first mixed solution; the volume ratio of water and ethylene glycol is 1:2 ;

[0061] 2. Transfer the above-mentioned first mixed solution to a reaction kettle, ball mill for 8 hours, react at 250°C for 12 hours, separate and dry to obtain a white powder and calcinate at 950°C for 1 hour to obtain the second luminescent material, which is YbNbO 4 :Er 3+ @YbNbO 4 :Tm 3+ @YbNbO 4 :Eu 3+ Nanocrystals with three core-shell layers, respectively core YbNbO 4 :Er 3+ , the first shell is YbNbO 4 :Tm 3+ , the second shell is YbNbO 4 :Eu 3+ . Wherein, the molar r...

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Abstract

The invention belongs to the technical field of optical materials, and particularly relates to a luminescent material, a preparation method thereof and a multiband optical temperature sensor. The invention provides a luminescent material which comprises an inner core and a shell, and the shell wraps the periphery of the inner core; the inner core comprises a first rare earth ion doped MNbO4 nanocrystal (in the formula, M represents any one element selected from lanthanide elements); the shell comprises a nanocrystal of second rare earth ion doped MNbO4 (in the formula, M represents any one element selected from lanthanide elements); the first rare earth ions and the second rare earth ions are different rare earth ions respectively. According to the luminescent material, the preparation method thereof and the multi-band optical temperature sensor provided by the invention, the technical blank that a luminescent material with multiple spectrums and multi-band sensitive temperature performance does not exist at present can be effectively filled up.

Description

technical field [0001] The application belongs to the technical field of optical materials, and in particular relates to a luminescent material, a preparation method thereof, and a multi-band optical temperature sensor. Background technique [0002] In recent years, optical temperature sensors based on fluorescence intensity ratio (FIR) technology have attracted much attention due to their excellent sensitivity and accuracy. FIR techniques are usually implemented by comparing the fluorescence intensities of two thermally coupled energy levels of a rare earth (RE) ion. The technique is largely immune to spectral losses and fluctuations in excitation intensity, providing more precise temperature measurements. In addition, this optical temperature sensor can detect the temperature at a certain distance from an object by detecting the relationship between fluorescence intensity and temperature. Therefore, optical temperature sensors based on FIR technology have greater advanta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78C09K11/02G01K11/20B82Y30/00
CPCC09K11/7769C09K11/02G01K11/20B82Y30/00
Inventor 钱艳楠童翾吴思萦杨哲周凯张海燕
Owner GUANGDONG UNIV OF TECH
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