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Fluorescent powder for non-contact fluorescence temperature measurement and preparation method thereof

A non-contact temperature measurement and phosphor technology, applied in chemical instruments and methods, thermometers, luminescent materials, etc., can solve the problems of complex process and difficult to completely remove organic matter.

Active Publication Date: 2021-05-18
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The good shape of the phosphor powder also has a great influence on the temperature measurement performance. Nanopowders with good size uniformity and dispersion often show better performance, but organic solvents are often added during the synthesis of nanopowders, which makes the process complicated. And organic matter is difficult to completely remove by simple calcination

Method used

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  • Fluorescent powder for non-contact fluorescence temperature measurement and preparation method thereof
  • Fluorescent powder for non-contact fluorescence temperature measurement and preparation method thereof
  • Fluorescent powder for non-contact fluorescence temperature measurement and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Prepare the solution

[0036] Lanthanum nitrate hexahydrate (La(NO 3 ) 3 ·6H 2 O) Mix well in deionized water to prepare La 3+ Lanthanum nitrate (La(NO) with a concentration of 0.20mol / L 3 ) 3 ) solution;

[0037] Ytterbium nitrate hexahydrate (Yb(NO 3 ) 3 ·5H 2 O) mix well in deionized water and prepare Yb 3+ Ytterbium nitrate (Yb(NO 3 ) 3 ) solution;

[0038] Erbium nitrate hexahydrate (Er(NO 3 ) 3 ·5H 2 O) Mix well in deionized water to prepare Er 3+ Erbium nitrate (Er(NO 3 ) 3 ) solution;

[0039] Sodium tungstate dihydrate (Na 2 WO 4 2H 2 O) Mix well in deionized water and prepare WO 4 2- Sodium tungstate (Na 2 WO 4 ) solution;

[0040] (2) The prepared lanthanum nitrate (La(NO 3 ) 3 ) solution, ytterbium nitrate (Yb(NO 3 ) 3 ) solution and erbium nitrate (Er(NO 3 ) 3 ) solutions are mixed to obtain a mixed solution of lanthanum nitrate, ytterbium nitrate and erbium nitrate; wherein, in molar ratio, lanthanum nitrate: ytterbium n...

Embodiment 2

[0046] (1) Prepare the solution

[0047] Lanthanum nitrate hexahydrate (La(NO 3 ) 3 ·6H 2 O) Mix well in deionized water to prepare La 3+ Lanthanum nitrate (La(NO) with a concentration of 0.02mol / L 3 ) 3 ) solution;

[0048] Ytterbium nitrate hexahydrate (Yb(NO 3 ) 3 ·5H 2 O) mix well in deionized water and prepare Yb 3+ Ytterbium nitrate (Yb(NO) with a concentration of 0.02mol / L 3 ) 3 ) solution;

[0049] Erbium nitrate hexahydrate (Er(NO 3 ) 3 ·5H 2 O) Mix well in deionized water to prepare Er 3+ Erbium nitrate (Er(NO) with a concentration of 0.02mol / L 3 ) 3 ) solution;

[0050] Sodium tungstate dihydrate (Na 2 WO 4 2H 2 O) Mix well in deionized water and prepare WO 4 2- Sodium tungstate (Na 2 WO 4 ) solution;

[0051] (2) The prepared lanthanum nitrate (La(NO 3 ) 3 ) solution, ytterbium nitrate (Yb(NO 3 ) 3 ) solution and erbium nitrate (Er(NO 3 ) 3 ) solutions are mixed to obtain a mixed solution of lanthanum nitrate, ytterbium nitrate and e...

Embodiment 3

[0057] (1) Prepare the solution

[0058] Lanthanum nitrate hexahydrate (La(NO 3 ) 3 ·6H 2 O) Mix well in deionized water to prepare La 3+ Lanthanum nitrate (La(NO) with a concentration of 0.40mol / L 3 ) 3 ) solution;

[0059] Ytterbium nitrate hexahydrate (Yb(NO 3 ) 3 ·5H 2O) mix well in deionized water and prepare Yb 3+ Ytterbium nitrate (Yb(NO) with a concentration of 0.40mol / L 3 ) 3 ) solution;

[0060] Erbium nitrate hexahydrate (Er(NO 3 ) 3 ·5H 2 O) Mix well in deionized water to prepare Er 3+ Erbium nitrate (Er(NO 3 ) 3 ) solution;

[0061] Sodium tungstate dihydrate (Na 2 WO 4 2H 2 O) Mix well in deionized water and prepare WO 4 2- Sodium tungstate (Na 2 WO 4 ) solution;

[0062] (2) The prepared lanthanum nitrate (La(NO 3 ) 3 ) solution, ytterbium nitrate (Yb(NO 3 ) 3 ) solution and erbium nitrate (Er(NO 3 ) 3 ) solutions are mixed to obtain a mixed solution of lanthanum nitrate, ytterbium nitrate and erbium nitrate; wherein, in molar rat...

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Abstract

The invention belongs to the field of material science and technology, and discloses fluorescent powder for non-contact fluorescence temperature measurement and a preparation method thereof. The component of the fluorescent powder for non-contact temperature measurement is (RE<1-x-y>Yb<x>Er<y>)<2>W<2>O<9>, and the fluorescent powder for non-contact temperature measurement has high absolute sensitivity (Sa=0.0253 K<-1>) and relative sensitivity (Sr=0.0105 K<-1>) by using the fluorescence intensity ratio of thermal coupling energy levels 2H11 / 2 to 4I15 / 2 and 4S3 / 2 to 4I15 / 2 of rare earth ions Er<3+> for temperature measurement. The preparation method is low in temperature, energy-saving, simple in synthesis process and easy to operate. The reaction is carried out at room temperature to 70 DEG C to obtain a precursor product, and the (RE<1-x-y>Yb<x>Er<y>)<2>W<2>O<9> fluorescent powder can be obtained through simple calcination. No organic matter or surfactant is added in the synthesis process, and nano powder with uniform size and good dispersity can be obtained through simple precipitation and subsequent calcination.

Description

technical field [0001] The invention belongs to the field of material science and technology, and relates to a fluorescent powder for non-contact fluorescent temperature measurement and a preparation method thereof. Background technique [0002] Temperature is an important thermodynamic parameter, which plays a crucial role in fields such as medicine, industrial production, scientific research and daily life. Traditional temperature measurement is contact measurement, based on the principle of thermal expansion and contraction of solids, liquids, and gases, such as thermocouple thermometers and mercury thermometers. Due to the disadvantages of low sensitivity and limited response time of this contact temperature measurement technology, it cannot be applied in some harsh conditions. In some current scientific research and technical applications, the precise control and measurement of rapid temperature response, high sensitivity, and high spatial resolution are extremely impo...

Claims

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Application Information

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IPC IPC(8): C09K11/78G01K11/20
CPCC09K11/7769G01K11/20Y02B20/00
Inventor 王雪娇孙萌付莹王秋实龚长帅王闯张帆赵昕睿
Owner BOHAI UNIV
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