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Porous ceramic composite thermal insulation material and preparation method thereof

A technology of thermal insulation material and porous ceramics, applied in the field of materials, can solve the problems of high requirements on raw materials, difficult to control process conditions, uncontrollable shape, density and pore size, etc., and achieve the effect of good thermal insulation effect.

Inactive Publication Date: 2016-09-21
陈昌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic foam impregnation is suitable for preparing materials with high porosity and large open porosity, but its disadvantage is that the shape, density and pore size cannot be controlled
Adding a pore-forming agent can be used to prepare materials with various shapes and adjustable porosity. The disadvantage is that the distribution of pores is poor, and materials with large porosity cannot be produced.
The foaming method is easier to control the final shape, composition and density of the material, and its disadvantage is that the raw material requirements are high and the process conditions are difficult to control

Method used

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  • Porous ceramic composite thermal insulation material and preparation method thereof

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Effect test

Embodiment 1

[0022] A porous ceramic composite heat insulation material prepared by weight parts of the following components: 15 parts of polycrystalline mullite fiber, 5 parts of nano silica, 4 parts of β-cyclodextrin, and methyl parahydroxybenzoate 0.1 part, 6 parts of boron carbide, 6 parts of silicon carbide, 0.2 part of polyacrylamide, 0.2 part of rosin, 1 part of water glass, 0.5 part of polyvinyl chloride, 0.1 part of vinyl bisstearamide, 1 part of silica sol, carboxymethyl 0.5 parts of base cellulose sodium, 10 parts of hydrochloric acid, 10 parts of isopropanol, and 60 parts of water.

[0023] The preparation method of the above porous ceramic composite heat insulation material is as follows: first cut the polycrystalline mullite fiber into a length of 1 mm, then mix it with hydrochloric acid, stir with a mixer for 3 minutes, rinse with water, repeat the operation 3 times, and wash away the fiber Then add the remaining components, stir with a mixer at 300r / min for 2 hours, pour it in...

Embodiment 2

[0025] A porous ceramic composite heat-insulating material prepared by the following components in parts by weight: 22 parts of polycrystalline mullite fiber, 7.5 parts of nano-silica, 5.5 parts of β-cyclodextrin, and methyl parahydroxybenzoate 0.2 parts, boron carbide 8 parts, silicon carbide 8 parts, polyacrylamide 0.35 parts, rosin 0.3 parts, water glass 1.5 parts, polyvinyl chloride 0.75 parts, vinyl bisstearamide 0.15 parts, silica sol 1.5 parts, carboxymethyl 0.75 parts of base cellulose sodium, 15 parts of hydrochloric acid, 20 parts of isopropanol, and 75 parts of water.

[0026] The method for preparing the above porous ceramic composite heat insulation material is as follows: first cut the polycrystalline mullite fiber into 2 mm length, mix it with hydrochloric acid, stir with a mixer for 4 minutes, rinse with water, repeat the operation 3 times, and wash away the fiber Then add the remaining components, stir for 2.5 hours with a mixer at a speed of 400r / min, pour it in...

Embodiment 3

[0028] A porous ceramic composite thermal insulation material prepared by weight parts of the following components: 30 parts of polycrystalline mullite fiber, 10 parts of nano-silica, 7 parts of β-cyclodextrin, and methyl parahydroxybenzoate 0.3 parts, 10 parts of boron carbide, 10 parts of silicon carbide, 0.5 parts of polyacrylamide, 0.4 parts of rosin, 2 parts of water glass, 1 part of polyvinyl chloride, 0.2 parts of vinyl bisstearamide, 2 parts of silica sol, carboxymethyl 1 part of base cellulose sodium, 20 parts of hydrochloric acid, 30 parts of isopropanol, and 90 parts of water.

[0029] The preparation method of the above porous ceramic composite heat insulation material is as follows: first cut the polycrystalline mullite fiber into a length of 3 mm, then mix with hydrochloric acid, stir with a mixer for 5 minutes, rinse with water, repeat the operation 3 times to wash away the fiber Then add the remaining components, stir with a mixer at a speed of 500r / min for 3 hour...

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Abstract

The invention provides a porous ceramic composite thermal insulation material and a preparation method thereof. The porous ceramic composite thermal insulation material is prepared from the following components: polycrystalline mullite fiber, nano silica, beta-cyclodextrin, methyl p-hydroxybenzoate, boron carbide, silicon carbide, polyacrylamide, rosin, water glass, polyvinyl chloride, ethylene bis stearamide, silica sol, sodium carboxymethylcellulose, hydrochloric acid, isopropanol and water. The preparation method includes: firstly cutting polycrystalline mullite fiber into a length of 1-3mm, then mixing the cut polycrystalline mullite fiber with hydrochloric acid, and performing rinsing with clean water, repeating the operation three times to wash off fiber balls in the fiber, then adding the remaining components and performing stirring, pouring the mixture into a mold, conducting pressing to drain water so as to obtain a wet blank; and drying the wet blank in an oven, then sintering the blank in a muffle furnace. The porous ceramic composite thermal insulation material provided by the invention has a density range of 0.77-0.81g / cm<3>, compressive strength up to 7.28MPa, and strong rigidity, and also has very good thermal insulation effect.

Description

technical field [0001] The invention relates to the field of materials, in particular to a porous ceramic composite heat insulating material and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of science and technology, the research and development of new materials has become more and more popular, and their performance has become more and more complex and superior. Ceramic porous materials are one of the relatively emerging functional materials. Its preparation process mainly includes organic foam impregnation, adding pore-forming agent, foaming and vacuum filtration. Organic foam impregnation is suitable for preparing materials with high porosity and large open porosity, but its disadvantage is that the shape, density and pore size cannot be controlled. Adding a pore-forming agent can be used to produce materials with various shapes and adjustable porosity. The disadvantage is that the distribution of pores is poor, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B35/80C04B35/185
CPCC04B38/00C04B35/185C04B35/80C04B2235/3418C04B2235/3427C04B2235/3821C04B2235/3826C04B2235/602C04B2235/6562C04B2235/6567C04B2235/74C04B2235/77C04B38/0067
Inventor 陈昌
Owner 陈昌