High-sensitivity fluorescent powder applied to temperature sensor and preparation method thereof

A temperature sensor and phosphor technology, applied in chemical instruments and methods, thermometers, thermometers with physical/chemical changes, etc., can solve the problems of low laser penetration and limited application, and achieve high thermal sensitivity and simple preparation process. , the effect of increasing production

Pending Publication Date: 2021-03-30
XINYI XIYI ADVANCED MATERIALS RES INST OF IND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Halides and oxyhalides have lower phonon energies than oxide substrates, but these substrates have limited applications due to low laser penetration

Method used

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  • High-sensitivity fluorescent powder applied to temperature sensor and preparation method thereof
  • High-sensitivity fluorescent powder applied to temperature sensor and preparation method thereof
  • High-sensitivity fluorescent powder applied to temperature sensor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: CaTi 4 o 9 :0.005Er 3+ ,0.2Yb 3+

[0016] First, according to the stoichiometric ratio, the Er with a purity greater than 99.9% was weighed 2 o 3 , CaCl 2 and Yb 2 o 3 The raw materials were dissolved in a deionized aqueous solution of dilute nitric acid with a volume fraction of 8%, to prepare a solution with a metal ion concentration of 2 mol / L, and then heated the solution at 60° C. for 30 minutes. Then weigh the TiO that meets the stoichiometric ratio 2 , under magnetic stirring at 100rpm, the TiO 2 Soluble in absolute ethanol. After stirring at room temperature for about 30 min, the Ca(NO 3 ) 2 , Yb(NO 3 ) 3 , Er(NO 3 ) 3 The mixed solution of the above was slowly added dropwise to the ethanol solution of titanium dioxide. The temperature of the mixed solution was raised to 60° C., and the ethanol in the solution was heated and evaporated. Then the solution was kept at 80°C for about 10 h and then turned into a gel. Then the obtained g...

Embodiment 2

[0017] Example 2: CaTi 4 o 9 :0.1Er 3+ ,0.1Yb 3+

[0018] First, according to the stoichiometric ratio, the Er with a purity greater than 99.9% was weighed 2 o 3 , CaCl 2 and Yb 2 o 3 The raw material is dissolved in a deionized aqueous solution of dilute nitric acid with a volume fraction of 10%, to prepare a solution with a metal ion concentration of 0.5 mol / L, and then heat the solution at 80° C. for 10 minutes. Then weigh the TiO that meets the stoichiometric ratio 2 , under magnetic stirring at 200rpm, the TiO 2 Soluble in absolute ethanol. After stirring at room temperature for about 10 min, the Ca(NO 3 ) 2 , Yb(NO 3 ) 3 , Er(NO 3 ) 3 The mixed solution of the above was slowly added dropwise to the ethanol solution of titanium dioxide. The temperature of the mixed solution was raised to 80° C., and the ethanol in the solution was heated and evaporated. The solution was then kept at 70 °C for about 18 h and then turned into a gel. Then the obtained gel ...

Embodiment 3

[0019] Example 3: CaTi 4 o 9 :0.2Er 3+ ,0.005Yb 3+

[0020] First, according to the stoichiometric ratio, the Er with a purity greater than 99.9% was weighed 2 o 3 , CaCl 2 and Yb 2 o 3 The raw material is dissolved in a deionized aqueous solution of dilute nitric acid with a volume fraction of 9%, to prepare a solution with a metal ion concentration of 1 mol / L, and then heat the solution at 70° C. for 20 minutes. Then weigh the TiO that meets the stoichiometric ratio 2 , under magnetic stirring at 150rpm, the TiO 2 Soluble in absolute ethanol. After stirring at room temperature for about 20 min, the Ca(NO 3 ) 2 , Yb(NO 3 ) 3 , Er(NO 3 ) 3 The mixed solution of the above was slowly added dropwise to the ethanol solution of titanium dioxide. The temperature of the mixed solution was raised to 70° C., and the ethanol in the solution was heated and evaporated. The solution was then kept at 75 °C for about 12 h to become a gel. Then the obtained gel was calcined...

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Abstract

The invention discloses high-sensitivity fluorescent powder applied to a temperature sensor and a preparation method thereof, and belongs to the field of luminescent materials. The invention providesfluorescent powder, CaTi4O9:xEr<3+>, yYb<3+>, wherein x is greater than or equal to 0 and less than or equal to 0.02, and y is greater than or equal to 0 and less than or equal to 0.02. The inventionalso provides a preparation method. Pure fluorescent powder is prepared through a sol-gel method, and the co-doping of Er<3+> and Yb<3+> ions enhances the luminescence through an energy transfer process, the temperature induction capability is improved, and high sensitivity is realized. The finally prepared fluorescent powder reaches the maximum sensitivity of 4.9-5*10<-3>K<-1> at 323K. The preparation method provided by the invention is simple in process, stable in product performance and suitable for industrial production.

Description

technical field [0001] The invention provides a high-sensitivity fluorescent powder applied to a temperature sensor and a preparation method thereof, belonging to the technical field of preparation and application of luminescent materials. Background technique [0002] Compared to the excitation wavelength of laser light, up-converting phosphors can generate shorter wavelengths. Some doped with trivalent rare earth (RE 3+ )-ion upconversion materials have attracted much attention due to their application potential in solar cells, color displays, biolabels, optical fiber communications, temperature sensors, etc. So far, most of these applications are in the design stage, so further research is still needed in this area. The emission from the infrared to the visible band is the interaction between the matrix compound and the rare earth luminescent center. During the upconversion process, the interaction of ions induces the multiple electron conversion of rare earth ions. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/67G01K11/20
CPCC09K11/7769G01K11/20
Inventor 张乐甄方正康健陈东顺罗泽赵超陈浩
Owner XINYI XIYI ADVANCED MATERIALS RES INST OF IND TECH CO LTD
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