Spinel structural infrared radiation material doped with rare-earth element and preparation method

A spinel structure and infrared radiation technology, which is applied in the field of infrared radiation materials, can solve the problems of large energy consumption, long preparation cycle, and application limitations of infrared radiation materials, achieve low sintering temperature, short preparation cycle, and facilitate popularization and application Effect

Inactive Publication Date: 2014-05-07
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, although the method is simple to operate, it has the disadvantages of long preparation period and large energy consumption.
At present, the application of infrared radiation materials is limited due to the constraints of the use of wave bands and preparation methods.

Method used

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  • Spinel structural infrared radiation material doped with rare-earth element and preparation method
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  • Spinel structural infrared radiation material doped with rare-earth element and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A preparation method of a spinel structure infrared radiation material doped with rare earth elements, the chemical composition formula of which is CoFe 1.7 Y 0.2 La 0.1 o 4 ,Proceed as follows:

[0025] 1) Put 2.910g of cobalt nitrate, 6.868g of iron nitrate, 0.766g of yttrium nitrate and 0.433g of lanthanum nitrate in a container, add 30ml of deionized water, and stir at room temperature for 5 minutes to fully dissolve the raw materials in deionized water;

[0026] 2) Add 6.3g of analytically pure citric acid as a complexing agent, and continue stirring at room temperature until the citric acid is completely dissolved;

[0027] 3) Add dropwise ammonia water with a concentration of 30 wt% to adjust the pH value of the solution to 5;

[0028] 4) Stir in a water bath at 80°C until a gel is formed;

[0029] 5) Dry the gel in an oven at 100°C for 5 hours to obtain a xerogel;

[0030] 6) Ignite at any point of the xerogel to produce self-propagating combustion until a...

Embodiment 2

[0036] A preparation method of a spinel structure infrared radiation material doped with rare earth elements, its chemical composition formula is Co 0.4 Cu 0.6 Fe 1.8 Y 0.2 o 4 ,Proceed as follows:

[0037] 1) Put 1.164g of cobalt nitrate, 1.128g of copper nitrate, 7.272g of ferric nitrate and 0.766g of yttrium nitrate in a container, add 30ml of deionized water, and stir at room temperature for 5 minutes to fully dissolve the raw materials in deionized water;

[0038] 2) Add 6.3g of analytically pure citric acid as a complexing agent, and continue stirring at room temperature until the citric acid is completely dissolved;

[0039] 3) Ammonia water with a concentration of 30 wt% was added dropwise to adjust the pH value of the solution to 6;

[0040] 4) Stir in a water bath at 80°C until a gel is formed;

[0041] 5) Dry the gel in an oven at 110°C for 4 hours to obtain a xerogel;

[0042] 6) Ignite at any point of the xerogel to produce self-propagating combustion until...

Embodiment 3

[0048] A preparation method of a spinel structure infrared radiation material doped with rare earth elements, the chemical composition formula of which is CoFe 1.8 Y 0.2 o 4 ,Proceed as follows:

[0049] 1) Put 2.91g of cobalt nitrate, 7.272g of iron nitrate and 0.766g of yttrium nitrate in a container, add 30ml of deionized water, and stir at room temperature for 5min to fully dissolve the raw materials in deionized water;

[0050] 2) Add 6.3g of analytically pure citric acid as a complexing agent, and continue stirring at room temperature until the citric acid is completely dissolved;

[0051] 3) Ammonia water with a concentration of 30 wt% was added dropwise to adjust the pH value of the solution to 7;

[0052] 4) Stir in a water bath at 80°C until a gel is formed;

[0053]5) Dry the gel in an oven at 120°C for 3 hours to obtain a xerogel;

[0054] 6) Ignite at any point of the xerogel to produce self-propagating combustion until all the xerogel is burned to obtain a f...

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Abstract

The invention relates to a spinel structural infrared radiation material doped with a rare-earth element. The general chemical formula of the material is AFe[2-x]RExO4, wherein A is the mixture of Co, Cu or Co and Cu in any ratio; RE is the rare earth element such as Ce, La, Y or Nd. The preparation method comprises the following steps of dissolving metal nitrate of A, Fe AND Re into deionized water; adding citric acid until the metal nitrate is completely dissolved; dropwise adding ammonia water to adjust the pH value of the solution to 5 to 7, and stirring the solution to form gel under the water-bath condition; placing the mixture into a drying oven to be dried to obtain dry gel, igniting the dry gel to be completely burned, grinding the obtained powder, and sintering, thermally preserving and cooling the powder to obtain a target object. The spinel structural infrared radiation material has the advantages that the infrared transmitting rate at the wave band of 8 to 14 micrometers is high, and the material is applicable to the infrared heating; the preparation method is wide in raw material source, short in preparation period, low in sintering temperature, energy-saving, high-efficient and favorable of being popularized to use.

Description

technical field [0001] The invention relates to the technical field of infrared radiation materials, in particular to a spinel structure infrared radiation material doped with rare earth elements and a preparation method thereof. Background technique [0002] Infrared radiation, also known as infrared, can promote thermal motion such as particle vibration and rotation inside the material after it is absorbed by the material, and has a strong thermal effect. Therefore, infrared radiation is regarded as a way of energy transfer and heat source. Infrared radiation materials refer to a class of materials that can absorb heat and emit a large amount of infrared rays, and their infrared radiation performance can be characterized by the infrared emissivity of a certain band. Research has found that different substances have different infrared absorption spectra. When various substances are irradiated with infrared rays, the extent to which the substances absorb radiation at differ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00C01G51/00C09K3/00
CPCY02P20/10
Inventor 于宏兵武晓燕董恒于晗
Owner NANKAI UNIV
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