A kind of preparation method of low-temperature sintered alumina ceramic film

An alumina ceramic membrane, low temperature sintering technology, applied in the fields of inorganic ceramic porous materials and inorganic ceramic separation membrane materials, can solve the problems of high manufacturing cost and investment cost, high sintering temperature of alumina ceramic membrane, and achieve production cost and investment cost. The effect of low, saving energy consumption and simple process method

Active Publication Date: 2022-06-21
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A kind of preparation method of low-temperature sintered alumina ceramic film
  • A kind of preparation method of low-temperature sintered alumina ceramic film
  • A kind of preparation method of low-temperature sintered alumina ceramic film

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% silica powder, 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 (containing 2‰ polyacrylic acid dissolved in water), mixed in a strong mixer for 40min; then kneaded in a kneader for 30min ; After 1 to 3 times of mud training on the coarse mud mill, the vacuum degree is not less than -0.095MPa; the mud is stale for 24 hours at a temperature of 20 to 25 ° C and a humidity of 50 to 80%; and then the vacuum degree is not less than - Sludge at 0.095MPa once; extrude a multi-channel alumina support on an 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 4mm; continuous microwave rapid setting, Microwave power 600w, conveyor speed 1....

Embodiment 2

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

Embodiment 3

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

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Abstract

The invention relates to the technical field of porous ceramic materials, in particular to a method for preparing a low-temperature sintered alumina ceramic membrane. Its main feature is the innovative design of a sintering aid that can sinter alumina ceramics in the range of 1200-1300 ° C. The addition of this sintering aid can significantly reduce the firing temperature of alumina porous ceramic materials, effectively saving sintering. Energy consumption and time, providing a low-temperature sintered substrate and film layer for the manufacture of alumina ceramic membranes used in the field of environmental protection. The preparation method has the characteristics of low sintering temperature, low production energy consumption, simple process method, low equipment requirements, low production cost and investment cost, flexible control, easy molding, suitable for industrial customization and large-scale production. The alumina ceramic ceramic membrane produced by the method has the characteristics of good hydrophilicity, super large permeation flux, high porosity, high yield, good acid and alkali resistance and long service life.

Description

technical field [0001] The patent of the present invention relates to the technical field of inorganic ceramic porous materials, in particular to the technical field of inorganic ceramic separation membrane materials, in particular to a preparation method of a low temperature sintered alumina ceramic membrane. 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 It has the advantages of 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 ra...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
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
OwnerZHEJIANG SCI-TECH UNIV