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Preparation method of low-temperature sintered alumina ceramic membrane

An alumina ceramic membrane and low-temperature sintering technology, which is applied in the fields of inorganic ceramic porous materials and inorganic ceramic separation membrane materials, can solve the problems of high sintering temperature of alumina ceramic membrane, high manufacturing cost and investment cost, and achieves simplified sintering process and high production cost. The effect of low cost and investment cost and simple process method

Active Publication Date: 2020-03-27
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high sintering temperature, high manufacturing cost and investment cost of the current alumina ceramic film

Method used

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  • Preparation method of low-temperature sintered alumina ceramic membrane
  • Preparation method of low-temperature sintered alumina ceramic membrane
  • Preparation method of low-temperature sintered alumina ceramic membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0031] 85% α-Al with a medium particle size of 5 μm 2 o 3 powder, 15% sintering aids (35% kaolin, 20% magnesium oxide, 10% calcium carbonate, 20% silicon micropowder, 10% borosilicate glass powder and 5% water glass), 5.5% hydroxypropyl methylcellulose (Viscosity 100,000) 6% graphite powder (5000 mesh), 6% oleic acid and 22% water (including 2‰ polyacrylic acid dissolved in water), mixed in a strong mixer for 40 minutes; then kneaded in a kneader for 30 minutes ;After refining the mud on the rough mud machine for 1 to 3 times, practice the mud again under a vacuum degree of not less than -0.095MPa; stale for 24 hours at a temperature of 20-25°C and a humidity of 50-80%; and then again in a vacuum degree of not less than -0.095MPa; The mud is drilled once at 0.095MPa; the tubular alumina support with multiple channels is extruded on the extruder with a vacuum degree of not less than -0.095MPa, the outer diameter of the support is 30mm, 19 channels, and the channel diameter is ...

Embodiment 2

[0034] Only the firing temperature of the film layer was changed to 1100° C., and the other operation steps, addition amount and control parameters were the same as in Example 1.

Embodiment 3

[0036] Only the firing temperature of the film layer was changed to 1120° C., and the other operation steps, addition amount and control parameters were the same as in Example 1.

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Abstract

The invention relates to the technical field of porous ceramic materials, in particular to a preparation method of a low-temperature sintered alumina ceramic membrane. The method is mainly characterized in that a sintering aid for firing of alumina ceramic within the temperature range of 1200-1300DEG C is innovatively designed, adding of the sintering aid obviously lowers the firing temperature ofan alumina porous ceramic material, the sintering energy consumption and time are effectively saved, and a low-temperature sintered base material and a film layer are provided for manufacturing an alumina ceramic membrane used for the environmental protection field. The preparation method has the characteristics of low sintering temperature, low production energy consumption, simple process method, low equipment requirement, low production cost and investment cost, flexible control, easy forming, suitability for industrial customization and meeting of the large-scale production requirement. The alumina ceramic membrane produced by the method has the characteristics of good hydrophilicity, ultra-high permeation flux, high porosity, high yield, good acid and alkali resistance and long service life.

Description

technical field [0001] The patent of the invention relates to the technical field of inorganic ceramic porous materials, in particular to the technical field of inorganic ceramic separation membrane materials, specifically a method for preparing low-temperature sintered alumina ceramic membranes. Background technique [0002] Separation membrane materials are the core of membrane separation technology. Existing separation membrane materials are mainly divided into organic polymer membranes and inorganic ceramic membranes. Compared with organic polymer membrane materials, inorganic ceramic membrane materials have high mechanical strength, acid and alkali resistance, and High temperature, organic solvent resistance, biological corrosion resistance, oxidant oxidation resistance, narrow pore size distribution, high porosity, good pore concentration, good hydrophilicity, strong anti-pollution ability, long service life and wide application range. It is especially suitable for sea...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B35/10C04B35/622C04B35/64
CPCC04B38/0645C04B38/068C04B38/067C04B35/10C04B35/622C04B35/62218C04B35/64C04B2235/349C04B2235/3206C04B2235/3208C04B2235/3427C04B2235/425
Inventor 陈锋涛
Owner ZHEJIANG SCI-TECH UNIV
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