Preparation method of aluminium oxide-silicon oxide-zirconium oxide ternary compound aerogel

A ternary composite and aerogel technology, which is applied in the field of preparation of heat-insulating alumina-silica-zirconia ternary composite airgel, can solve the problems of poor infrared blocking ability, unfavorable industrialization, cumbersome operation, etc. Achieve the effect of good high temperature resistance, good agglomeration and high specific surface area

Inactive Publication Date: 2015-04-29
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method technological process is complicated, and operation is loaded down with trivial details, is unfavorable for realizing industrialization, and the ability of this method to block infrared is relatively poor, can not bear very high temperature [Horiuchi T, Osaki T, Sugiyama T, et a1. Journal of Non-Crystalline Solids, 2001, 291: 187-198]

Method used

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  • Preparation method of aluminium oxide-silicon oxide-zirconium oxide ternary compound aerogel
  • Preparation method of aluminium oxide-silicon oxide-zirconium oxide ternary compound aerogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of alumina sol

[0031] Weigh 1.8g of anhydrous aluminum chloride as the precursor of alumina airgel, place it in a 100ml beaker, add 5ml of anhydrous methanol and 5ml of deionized water, and stir fully at 15°C to dissolve the aluminum salt until the formation of anhydrous color transparent solution.

[0032] (2) Preparation of silica and zirconia hybrid gel

[0033] Weigh 8ml of tetraethyl orthosilicate as the precursor of silica airgel and 0.4g of zirconium oxychloride as the precursor of zirconia, place them in a 100ml beaker, add 5ml of anhydrous methanol and 5ml of deionized water, at 15°C Stir well until a colorless and transparent solution is formed.

[0034] (3) Preparation of alumina, silica, zirconia ternary gel

[0035] Mix the prepared alumina sol with silica and zirconia sol, add 6ml of methyl propylene oxide, stir for 60 minutes to obtain a ternary sol, and let it stand to obtain a gel;

[0036] (4) Aging

[0037] The o...

Embodiment 2

[0042] (1) Preparation of alumina sol

[0043] Weigh 1.8g of anhydrous aluminum chloride as the precursor of alumina airgel, place it in a 100ml beaker, add 10ml of anhydrous methanol and 8ml of deionized water, and stir well at 15°C to dissolve the aluminum salt until the formation of anhydrous color transparent solution.

[0044] (2) Preparation of silica and zirconia hybrid gel

[0045] Weigh 0.4ml of methyl orthosilicate as the precursor of silica airgel and 0.54g of zirconia nitric acid as the precursor of zirconia, place them in a 100ml beaker, add 10ml of anhydrous methanol and 5ml of deionized water, at 15 Stir well at ℃ until a colorless transparent solution is formed.

[0046] (3) Preparation of alumina, silica, zirconia ternary gel

[0047]Mix the prepared alumina sol with silica and zirconia sol, add 8ml of methyl propylene oxide, stir for 70 minutes to obtain a ternary sol, and let stand to obtain a gel;

[0048] (4) Aging

[0049] The obtained te...

Embodiment 3

[0054] (1) Preparation of alumina sol

[0055] Weigh 2.5g of aluminum chloride hexahydrate as the precursor of alumina airgel, place it in a 100ml beaker, add 10ml of anhydrous methanol and 4ml of deionized water, stir well at 15°C to dissolve the aluminum salt until the formation of color transparent solution.

[0056] (2) Preparation of silica and zirconia hybrid gel

[0057] Weigh 0.8ml of methyl orthosilicate as the precursor of silica airgel and 0.63g of zirconia nitric acid as the precursor of zirconia, place them in a 100ml beaker, add 10ml of anhydrous methanol and 7ml of deionized water, at 15 Stir well at ℃ until a colorless transparent solution is formed.

[0058] (3) Preparation of alumina, silica, zirconia ternary gel

[0059] Mix the prepared alumina sol with silica and zirconia sol, add 9ml of methyl propylene oxide, stir for 80 minutes to obtain a ternary sol, and let it stand to obtain a gel;

[0060] (4) Aging

[0061] The obtained ternar...

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Abstract

The invention relates to a preparation method of heat-insulating aluminium oxide-silicon oxide-zirconium oxide ternary compound aerogel. The preparation method comprises the following steps: using inorganic aluminium salt, silicon salt, inorganic zirconium salt as precursors, an alcohol solvent and water as reaction solvents, and epoxide as a gel accelerator, performing supercritical fluid drying process to obtain the block-shaped ternary compound aerogel with excellent performance. The obtained ternary compound aerogel sample is low in density, good in elasticity and stable in performance; compared with single aluminium oxide aerogel, single silicon oxide aerogel and single zirconium oxide aerogel, the ternary compound aerogel can bear higher temperature and is more stable in quality; through excellent high temperature stability, the application range of the ternary compound aerogel is extended, so that the ternary compound aerogel can be used in the field of heat insulation.

Description

technical field [0001] The invention relates to a method for preparing a heat-insulating alumina-silicon oxide-zirconia ternary composite airgel, and specifically designs a method for preparing a ternary gel with excellent heat-insulating performance. Background technique [0002] Airgel is a highly dispersed solid-state material in which colloidal particles or polymer molecules are aggregated into a nanoporous network structure, and the pores are filled with a gaseous dispersion medium. This material with a sponge-like open-pore structure has a very large specific surface area, and the structure of the material can be controlled at the microscopic scale of nanometer scale, so that it has many unique properties. The unique structural characteristics of aerogels make aerogels have singular properties in thermal, electrical, acoustic, optical and other aspects. [0003] The pore size of airgel is smaller than the mean free path of air molecules, so there is no air convection ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B32/00
Inventor 陈晓红李智鹏宋怀河
Owner BEIJING UNIV OF CHEM TECH
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