Cordierite-aluminium borate whisker composite, preparation method and application thereof

A technology of aluminum borate whiskers and composite materials, applied in the field of modification of inorganic materials, can solve the problems of small specific surface area and poor adsorption performance, and achieve the effects of increasing specific surface area, large comparative area and good mechanical properties

Inactive Publication Date: 2019-06-07
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defects and deficiencies in the prior art, the present invention provides a cordierite-aluminum borate whisker composite material, a preparation method and its application, which overcomes the small specific surface area of ​​the existing cordierite honeycomb ceramic carrier and its modified materials, and the adsorption poor performance defect

Method used

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  • Cordierite-aluminium borate whisker composite, preparation method and application thereof
  • Cordierite-aluminium borate whisker composite, preparation method and application thereof
  • Cordierite-aluminium borate whisker composite, preparation method and application thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0050] The present embodiment provides a kind of preparation method of cordierite-aluminum borate whisker composite material, specifically comprises the following steps: step 1, respectively with 8g borax (Na 2 B 4 o 7 10H 2 O) and 8g ammonium aluminum sulfate (NH 4 Al(SO 4 ) 4 12H 2 O) be dissolved in 500ml of water respectively; Step 2, slowly drip the borax solution in the aluminum ammonium sulfate solution, immediately have white precipitation to form, let stand overnight, wash and filter several times, dry at 45 ℃; Step 3, dry the product Mix with 12g of sodium sulfate and grind evenly; step 4, bury the cordierite in the mixture and heat at 1050°C for 3 hours, then cool naturally; step 5, boil in a boiling water bath until the residual sodium sulfate on the surface is completely dissolved, then cool, Washing and drying to obtain the cordierite-aluminum borate whisker composite material.

Embodiment 2

[0052] This example presents a method for preparing a cordierite-aluminum borate whisker composite material. The difference between this example and Example 1 is that in step 3, the cordierite is buried in the mixture and kept at 1050°C for 4 hours. .

Embodiment 3

[0054] This example provides a preparation method of a cordierite-aluminum borate whisker composite material. The difference between this example and Example 1 is that in step 3, the cordierite is buried in the mixture and kept at 1050°C for 2 hours. .

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Abstract

The invention discloses a cordierite-aluminium borate whisker composite, a preparation method and application thereof. Raw materials of the method comprise borax, aluminium ammonium sulfate, sodium sulfate and cordierite. The method specifically includes: step one, preparing a borax solution and an aluminium ammonium sulfate solution under room temperature; step two, slowly dropwise adding the borax solution into the aluminium ammonium sulfate solution, conducting standing overnight, conducting water washing and filtering for multiple times, and conducting drying, so as to obtain a dried product; step three, mixing the dried product with sodium sulfate, and conducting uniform grinding, so as to obtain a mixture; step four, burying cordierite in the mixture, and conducting mixing, heating and natural cooling; and step five, boiling the product obtained in the step four in a boiling water bath until sodium sulfate remained on the surface is completely dissolved, and then conducting cooling, washing and drying. The cordierite-aluminium borate whisker composites of the invention have the advantages of big specific surface, good mechanical property and chemical stability, efficient filtering effect on particles in the automobile exhaust.

Description

technical field [0001] The invention belongs to the technical field of modification methods of inorganic materials, and in particular relates to a cordierite-aluminum borate whisker composite material, a preparation method and an application thereof. Background technique [0002] Cordierite (2Al 2 o 3 2MgO 5SiO 2 ) Honeycomb ceramics have excellent thermal shock resistance, low expansion, wear resistance, good adsorption performance and relatively high mechanical strength and are widely used in catalytic converters for automobile exhaust, but the specific surface area of ​​the honeycomb ceramic carrier is small (< 1m 2 / g). In order to improve the purification effect of automobile exhaust, the surface of cordierite matrix material must be modified to increase the specific surface area. At present, the most commonly used method is the coating method, and the commonly used coating materials include zeolite, silicon oxide, aluminum oxide, etc., among which γ-Al 2 o 3 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/08B01J21/02B01J32/00B01J35/02B01J20/10B01J19/18B01D45/04
Inventor 杜炜王伟
Owner CHANGAN UNIV
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