Novel core-shell structure light and temperature sensing material and preparation method thereof

A technology of core-shell structure and light-temperature sensing, which is applied in the field of light-temperature sensing, can solve the problems that fluoride materials are easily oxidized and cannot realize the detection of light-temperature performance, and achieve improved up-conversion efficiency, good optical properties, crystallization good sex effect

Inactive Publication Date: 2016-03-16
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fluoride materials are easily oxidized at high temperatures and cannot be tested for light-temperature performance

Method used

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  • Novel core-shell structure light and temperature sensing material and preparation method thereof
  • Novel core-shell structure light and temperature sensing material and preparation method thereof
  • Novel core-shell structure light and temperature sensing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of NaY by High Temperature Pyrolysis 0.78 Yb 0.2 Er 0.02 f 4 Fluorescent nano-nuclear material; the raw materials are selected as the following table

[0024] raw material

NaCF 3 COO

Y(CF 3 COO) 3

Yb(CF 3 COO) 3

Er(CF 3 COO)

g

0.136

0.338

0.1024

0.0101

[0025] Weigh the corresponding raw materials and place them in a container; add 16ml of oleic acid and 8ml of oleylamine, pass in argon to raise the temperature to 120°C, and keep it warm for 30min; then raise the temperature to 275°C, and keep it warm for 30min; Add excess ethanol, centrifuge, and dry at 70°C to get NaY 0.78 Yb 0.2 Er 0.02 f 4 Nano-nuclear material, its variable temperature fluorescence spectrum under 980nm excitation is as follows figure 1 shown.

[0026] Using high temperature pyrolysis method in NaY 0.78 Yb 0.2 Er 0.02 f 4 The surface of the fluorescent nano-nuclear material is coated with a layer of NaYF 4 ...

Embodiment 2

[0032] Preparation of NaY by High Temperature Pyrolysis 0.747 Yb 0.25 T m 0.003 f 4 Fluorescent nano-nuclear material; the raw materials are selected as the following table

[0033] raw material

NaCF 3 COO

Y(CF 3 COO) 3

Yb(CF 3 COO) 3

Tm(CF 3 COO)

g

0.1360

0.3197

0.1280

0.0016

[0034] Weigh the corresponding raw materials and place them in a container; add 16ml of oleic acid and 8ml of oleylamine, pass in argon to raise the temperature to 120°C, and keep it warm for 30min; then raise the temperature to 275°C, and keep it warm for 30min; Add excess ethanol, centrifuge, and dry at 70°C to get NaY 0.78 Yb 0.2 Er 0.02 f 4 Nano-nuclear material, its variable temperature fluorescence spectrum under 980nm excitation is as follows image 3 shown.

[0035] Using high temperature pyrolysis method in NaY 0.747 Yb 0.25 T m 0.003 f 4 The surface of the fluorescent nano-nuclear material is coated with a layer o...

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PUM

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Abstract

The invention discloses a novel core-shell structure material with light and temperature sensing property and a preparation method thereof. Firstly a high-temperature pyrolysis process is adopted for preparing spherical NaY0.78Yb0.2Er0.02 and NaY0.747Yb0.25Tm0.003 fluorescent core monodisperse nano particles, then the high-temperature pyrolysis process is adopted for coating a NaYF4 passivation shell on the surface of a NaY0.78Yb0.2Er0.02 or NaY0.747Yb0.25Tm0.003 fluorescent nano crystal nucleus material to obtain NaY0.747Yb0.25Tm0.003@NaYF4 core-shell structure nano particles, and finally a hydrolysis process is adopted for coating a SiO2 shell on NaY0.78Yb0.2Er0.02@NaYF4 or NaY0.747Yb0.25Tm0.003@NaYF4 core-shell structure nano particles to obtain a spherical NaY0.78Yb0.2Er0.02F4@NaYF4@SiO2 or NaY0.747Yb0.25Tm0.003F4@NaYF4@SiO2 three-layer nanofluoride composite material. The prepared composite material can avoid a three-layer nanofluoride composite material from being oxidized at high temperature, has efficient infrared-to-visible upconversion luminescence property and is applicable to being used as a good light and temperature sensing material. The novel core-shell structure material with the light and temperature sensing property can be applied to ink-jet printing and a printing technology and can be industrially produced in a large scale.

Description

technical field [0001] The invention relates to the technical field of light and temperature sensing, in particular to a preparation method of a novel core-shell structure light and temperature sensing material. Background technique [0002] The thermometers we generally use in life measure the temperature of the surface of an object through contact. However, in many special fields, such as: inside microelectronic devices, coal mines, voltage transformation places of high-voltage power stations, etc., contact temperature measurement is difficult to achieve. Therefore, research on non-contact temperature sensors is necessary. When the material is excited by light in the ultraviolet, visible or infrared region, it emits fluorescence. The mechanism of light-temperature sensing is based on detecting the change of fluorescence spectrum of light-emitting objects with temperature in high-temperature environment to realize temperature monitoring. The fluorescence emitted by adjace...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/86
Inventor 王祥夫刘青步妍妍孟岚颜晓红
Owner NANJING UNIV OF POSTS & TELECOMM
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