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Ceramic based high temperature heat storage material and preparation method thereof

A heat storage material and a ceramic-based technology, which are applied in the field of ceramic-based high-temperature heat storage materials and their preparation, can solve the problems of stable operation without a high-temperature latent heat storage system, and achieve low production cost, high thermal conductivity and high refractoriness. Effect

Inactive Publication Date: 2017-10-20
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, there is still no mature high-temperature latent heat storage system that operates stably

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A ceramic-based high-temperature heat storage material and a preparation method thereof. The preparation method described in this embodiment is:

[0041] The first step is to mix 20-30wt% powdered quartz, 50-60wt% aluminum sulfate, 0.1-1wt% lanthanum oxide powder and 10-20wt% anhydrous oxalic acid, and grind for 0.5-2 hours to obtain the abrasive.

[0042]The second step, the aluminum sulfate of 20~30wt%, the potassium chloride of 30~40wt%, the iron powder of 20~30wt%, the manganese powder of 10~20wt% and the aluminum powder of 10~20wt% are mixed uniformly, in 50 Compression molding under ~100MPa, heat treatment in argon atmosphere and 600~800°C for 0.5~1.5 hours, crushing, ball milling, drying at 90°C for 12 hours, and sieving to obtain sieved material A with a particle size of 0.088~1mm And sieve material B with particle size less than 0.088mm.

[0043] The third step is to mix 20~30wt% of grinding material, 20~30wt% of sieving material A, 30~40wt% of sieving materi...

Embodiment 2

[0046] A ceramic-based high-temperature heat storage material and a preparation method thereof. The preparation method described in this embodiment is:

[0047] The first step is to mix 30-40wt% fused silica, 40-50wt% aluminum nitrate, 1-5wt% zirconia powder and 10-20wt% citric acid monohydrate, and grind for 0.5-2 hours to obtain ground material.

[0048] The second step, the aluminum nitrate of 30~40wt%, the sodium chloride of 30~40wt%, the iron powder of 10~20wt%, the manganese powder of 10~20wt% and the aluminum powder of 10~20wt% are mixed uniformly, at 50 Compression molding under ~100MPa, heat treatment in nitrogen atmosphere and 600~800°C for 1~2 hours, pulverization, ball milling, drying at 90°C for 12 hours, and sieving to obtain sieved material A and Sieve material B with particle size less than 0.088mm.

[0049] The third step is to mix 30~40wt% of the grinding material, 20~30wt% of the sieving material A, 20~30wt% of the sieving material B and 5~10wt% of sodium...

Embodiment 3

[0052] A ceramic-based high-temperature heat storage material and a preparation method thereof. The preparation method described in this embodiment is:

[0053] The first step is to mix 20~30wt% fused silica, 40~50wt% aluminum sulfate, 5~10wt% zirconia powder and 20~30wt% anhydrous oxalic acid, and grind for 0.5~2 hours to obtain the abrasive .

[0054] The second step, the aluminum nitrate of 20~30wt%, the sodium chloride of 30~40wt%, the iron powder of 10~20wt%, the manganese powder of 20~30wt% and the aluminum powder of 10~20wt% are mixed uniformly, at 50 Compression molding under ~100MPa, heat treatment in nitrogen atmosphere and 600~800°C for 2~3 hours, pulverize, ball mill, dry at 90°C for 12 hours, and sieve to obtain sieved material A with a particle size of 0.088~1mm And sieve material B with particle size less than 0.088mm.

[0055] The third step is to mix 30~40wt% of the grinding material, 10~20wt% of the sieving material A, 30~40wt% of the sieving material B an...

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Abstract

The invention relates to a ceramic based high temperature heat storage material and a preparation method thereof. The preparation method is as follows: mixing a silicon-containing material, an aluminum salt, a stabilizer and a complexing agent and grinding to obtain a ground material; mixing the aluminum salt, an inorganic salt, iron powder, manganese powder and aluminum powder, pressing under 50-100MPa for molding, thermally treating in a neutral atmosphere at 600-800 DEG C, ball-milling, drying and sieving to obtain a sieved material A with the size of 0.088-1mm and a sieved material B with the size less than 0.088mm; mixing 0-50wt% of the ground material, 10-30wt% the sieved material A, 20-40wt% of the sieved material B and 5-10wt% of the inorganic salt, pressing under 10-30 MPa for molding, thermally treating in the neutral atmosphere at 700 to 900 DEG C to obtain the ceramic based high temperature heat storage material. The preparation method has the advantages of wide raw material sources, simple process and low production cost, and the ceramic based high temperature heat storage material product has high heat storage density, large thermal conductivity, high compressive strength and high thermal shock stability.

Description

technical field [0001] The invention belongs to the technical field of high-temperature heat storage materials. In particular, it relates to a ceramic-based high-temperature heat storage material and a preparation method thereof. Background technique [0002] Heat storage material is a new type of functional material that is widely used at present, and it is mainly used in the fields of industrial waste heat / waste heat recovery and utilization, comprehensive solar energy development and high temperature energy saving. Heat storage materials mainly include sensible heat storage materials and latent heat storage materials. Sensible heat storage materials use refractory materials as the main body to absorb heat. Since the heat absorption only depends on the change of sensible heat capacity of refractory materials, this heat storage material has the advantages of large volume, high cost, large thermal inertia, and gradual decline in output power. shortcoming. Latent heat stor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/626C04B35/63C04B35/632
CPCC04B35/10C04B35/6261C04B35/6303C04B35/632C04B2235/3201C04B2235/3227C04B2235/3244C04B2235/3418C04B2235/40C04B2235/402C04B2235/405C04B2235/5427C04B2235/658C04B2235/96C04B2235/9607
Inventor 王周福李景磊刘浩王玺堂马妍
Owner WUHAN UNIV OF SCI & TECH
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