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Ceramic-based heat storage material and preparation method thereof

A heat storage material and ceramic-based technology, applied in the field of ceramic-based heat storage materials and their preparation, can solve the problems of high production cost, low performance such as mechanical strength, thermal conductivity coefficient thermal shock stability, complex process, etc., and achieve production cost. The effect of low thermal conductivity, high thermal conductivity and high thermal shock stability

Inactive Publication Date: 2017-11-07
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires the pre-preparation of porous ceramic bodies, and the content of phase change materials depends on the pore size and distribution state of the porous ceramic prefabricated body. The process is relatively complicated and the production cost is high.
Existing heat storage materials still have the problems of low mechanical strength, thermal conductivity and thermal shock stability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A ceramic-based heat storage material and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0039] In the first step, 20-30wt% of titanium dioxide, 10-20wt% of zinc oxide powder, 40-50wt% of aluminum nitrate and 5-10wt% of anhydrous oxalic acid are mixed and ground for 0.5-2 hours to obtain an abrasive.

[0040] In the second step, the natural graphite of 10-20wt%, the titanium dioxide of 10-20wt%, the anhydrous sodium nitrate of 20-30wt%, the aluminum powder of 30-40wt% and the zinc powder of 20-30wt% are mixed evenly, in Compressed under the condition of 50~100MPa, heat treated at 700~900℃ and nitrogen atmosphere for 0.5~1.5 hours, cooled to room temperature with the furnace, crushed, ball milled, dried at 90℃ for 12 hours, and sieved to obtain a particle size of 0.088~ 1mm sieve material A and sieve material B with particle size less than 0.088mm.

[0041]In the third step, mix 20~30wt% of the grinding material, 2...

Embodiment 2

[0044] A ceramic-based heat storage material and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0045] The first step is to mix 30~40wt% metatitanic acid, 10~20wt% zirconia powder, 40~50wt% aluminum sulfate and 0.1~1wt% citric acid monohydrate, and grind for 0.5~2 hours to obtain Abrasives.

[0046] In the second step, the artificial graphite of 20~30wt%, the metatitanic acid of 20~30wt%, the anhydrous sodium carbonate of 20~30wt%, the aluminum powder of 20~30wt% and the zinc powder of 10~20wt% are mixed evenly, Compressed under the condition of 50~100MPa, heat treated at 400~600°C and argon atmosphere for 1~2 hours, cooled to room temperature with the furnace, crushed, ball milled, dried at 90°C for 12 hours, and sieved to obtain a particle size of Screening material A with a particle size of 0.088~1mm and screening material B with a particle size of less than 0.088mm.

[0047] The third step is to mix 30~40wt% of the ...

Embodiment 3

[0050] A ceramic-based heat storage material and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0051] The first step is to mix 40~50wt% metatitanic acid, 10~20wt% zirconia powder, 30~40wt% aluminum nitrate and 1~5wt% anhydrous oxalic acid, and grind for 0.5~2 hours to obtain the ground material.

[0052] In the second step, the artificial graphite of 10-20wt%, the titanium dioxide of 10-20wt%, the anhydrous sodium sulfate of 30-40wt%, the aluminum powder of 20-30wt% and the zinc powder of 10-20wt% are mixed evenly, in Compressed under the condition of 50~100MPa, heat treated at 500~700℃ and argon atmosphere for 2~3 hours, cooled to room temperature with the furnace, crushed, ball milled, dried at 90℃ for 12 hours, and sieved to obtain a particle size of 0.088 Sieve A with a particle size of ~1 mm and Sieve B with a particle size of less than 0.088 mm.

[0053] The third step is to mix 40~50wt% of the grinding material,...

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Abstract

The invention relates to a ceramic-based heat storage material and a preparation method thereof. The ceramic-based heat storage material adopts the technical scheme with the following steps of mixing titanium-containing raw material, a stabilizing agent, aluminum salt and a complexing agent, and grinding, so as to obtain a ground material; mixing carbon-containing raw material, titanium-containing raw material, inorganic salt, aluminum powder and zinc powder, molding at pressure of 50 to 100MPa, performing heat treatment in the neutral atmosphere at the temperature of 400 to 900 DEG C, crushing, and performing ball milling and screening, so as to obtain a screened material A with granularity of 0.088 to 1mm and a screened material with granularity less than 0.088mm; mixing 20 to 50wt% of ground material, 10 to 30wt% of screened material A, 20 to 40wt% of screened material B and 5 to 10wt% of inorganic salt, molding at the pressure of 10 to 30MPa, performing heat treatment in the neutral atmosphere at the temperature of 500 to 900 DEG C, and cooling together with a furnace to room temperature, so as to obtain the ceramic-based heat storage material. The ceramic-based heat storage material has the advantages that the technology is simple, the production cost is low, the heat storage density is large, the heat conduction coefficient is large, the pressure-withstanding strength is high, and the heat vibration stability is high.

Description

technical field [0001] The invention belongs to the technical field of heat storage materials. In particular, it relates to a ceramic-based 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 heat absorption only depends on the change of sensible heat capacity of refractory materials, sensible heat storage materials have disadvantages such as large volume, high cost, large thermal inertia, and gradual decline in output power. . Latent heat storage materials use the heat absorption a...

Claims

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Application Information

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IPC IPC(8): C04B35/46C04B35/49C04B35/622C09K5/06
CPCC04B35/46C04B35/49C04B35/622C04B2235/3201C04B2235/3217C04B2235/3284C04B2235/40C04B2235/402C04B2235/425C04B2235/658C04B2235/96C04B2235/9607C09K5/063
Inventor 王周福熊鑫刘浩王玺堂马妍
Owner WUHAN UNIV OF SCI & TECH
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