Micropore alumina and mullite ceramic separation film supporting body and preparation method thereof

A ceramic separation membrane and mullite technology, applied in the field of ceramic materials, can solve the problems of high price, low mechanical strength and high firing temperature, and achieve the effects of low cost, high mechanical strength and low firing temperature

Active Publication Date: 2016-01-20
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a microporous corundum-mullite ceramic separation membrane support on the basis of the above research, which solves the problem of high firing temperature, low mechanical strength and high price of the existing porous alumina ceramic separation membrane support. And other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Get by weight percentage: 67wt% aluminum hydroxide fine powder (Al 2 o 3 content of 65wt%), 25wt% kyanite fine powder (Al 2 o 3 Content is 50wt%) and 7wt% of calcium aluminate cement, 0.7wt% of sodium carbonate and 0.3wt% of carboxymethyl cellulose as raw materials, mixed uniformly in a mixer; plus 60wt% of the sum of the weight percentages of the above raw materials water, stirred to make a uniform suspension slurry; pour the slurry into the mold, and let it stand at room temperature for 48 hours until it solidified and formed to obtain a green body; after the green body was demolded, put it into an electric blast drying oven at 80~110°C Dry in medium for 24 hours, put the dried sample into a sintering furnace, raise the temperature to 1550°C at 3.5°C / min and keep it warm for 3h to obtain the microporous corundum-mullite ceramic separation membrane support.

[0025] After testing, the apparent porosity of the microporous corundum-mullite ceramic separation membrane ...

Embodiment 2

[0027] Take by weight percentage: 10wt% fused white corundum powder (Al 2 o 3 content of 98.5wt%), 60wt% industrial alumina powder (Al 2 o 3 content of 98wt%), 14wt% kaolin powder (Al 2 o 3 content of 38wt%), 15wt% of ρ-Al 2 o 3 and 1wt% sodium carbonate as raw materials, mix evenly in a mixer; add 50wt% water of the sum of the weight percentages of the above raw materials, and stir to make a uniform suspension slurry; inject the slurry into the mold and let it stand at room temperature After 48 hours of solidification and molding, the green body was obtained; after the green body was demoulded, it was placed in an electric blast drying oven at 110°C to dry for 24 hours; Keep warm for 3 hours to obtain the microporous corundum-mullite ceramic separation membrane support body.

[0028] After testing, the apparent porosity of the microporous corundum-mullite ceramic separation membrane support obtained in this example is 45.3%, the compressive strength is 87.8MPa, the ave...

Embodiment 3

[0030] Take by weight percentage: 30wt% fused white corundum powder (Al 2 o 3 content of 98.5wt%), 44wt% industrial alumina powder (Al 2 o 3 content of 96wt%), 5wt% of α-Al 2 o 3 Micropowder (Al 2 o 3 Content is 98wt%, average particle size 2μm), 10wt% andalusite powder (Al 2 o 3 content is 56wt%), 10wt% silica sol, 0.5wt% acrylamide and 0.5wt% polyacrylamide as raw materials, and mix them evenly in a mixer; add 60wt% of the sum of the weight percentages of the above raw materials. Water, Stir to make a uniform suspension slurry; inject the slurry into the mold, and let it stand at room temperature for 24 hours until it is solidified and formed to obtain a green body; after the green body is demoulded, put it in an electric blast drying oven at 110°C to dry for 48 hours; The dried sample was put into a sintering furnace, and the temperature was raised to 1600°C at 4°C / min and kept for 3 hours to obtain a microporous corundum-mullite ceramic separation membrane support....

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Abstract

The invention discloses a micropore alumina and mullite ceramic separation film supporting body and a preparation method thereof. The supporting body is prepared through the grouting forming technology and the in-situ reaction sintering process and is prepared from, by weight, 52-80% of aluminum oxide materials, 1-38% of alumina-silica raw materials, 1-18% of binding materials and 0.05-10% of additives. The granularity of aluminum oxide materials and alumina-silica raw materials is smaller than or equal to 0.075 mm. The method has the main advantages that a small amount of mullite with binding and filling effects is generated in a sample in situ, the sintering temperature of a product is reduced, and the physical performance of the product is improved; the obtained micropore alumina and mullite ceramic separation film supporting body is low in sintering temperature, high in mechanical strength, high in permeability, capable of resisting acid, alkali and high temperature, high in reproductivity, low in preparation cost, capable of easily controlling the process and suitable for application and popularization and the like.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials, and in particular relates to a microporous corundum-mullite ceramic separation membrane support body, and also relates to a preparation method of a microporous corundum-mullite ceramic separation membrane support body. Background technique [0002] Since the porous ceramic separation membrane entered the field of industrial application in the 1980s, it has high filtration efficiency, good selectivity, high temperature resistance, strong acid and alkali resistance and strong biological erosion ability, high mechanical strength, long life, and easy cleaning. , Easy to regenerate and other advantages, it has gradually been widely accepted by the industry, and has been widely used in the fields of food and beverage, biomedicine, water treatment, and gas filtration and separation. [0003] The porous ceramic separation membrane can be regarded as a membrane layer with a thickness of tens of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B35/10C04B35/622
Inventor 郭会师叶方保李文凤宋信钊谢国锋叶航
Owner ZHENGZHOU UNIV
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