A kind of ceramic film and preparation method thereof

A technology of ceramic membrane and particle suspension, which is applied in the field of membrane materials, can solve the problems of insufficient wear resistance and high brittleness, and achieve the effects of good integrity, low permeability resistance, and continuous and uniform membrane layer

Active Publication Date: 2021-04-27
南京钛净流体技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the film has only one kind of ceramic powder, alumina, although its mechanical strength is high, it is brittle and has insufficient wear resistance.

Method used

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  • A kind of ceramic film and preparation method thereof
  • A kind of ceramic film and preparation method thereof
  • A kind of ceramic film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Preparation of mixed sols:

[0051] The nitrates of aluminum, zirconium, and yttrium were prepared as mixed sols according to the combination of aluminum nitrate + zirconium nitrate, yttrium nitrate + zirconium nitrate, and the mass ratio of aluminum to zirconium oxide was (4:1) (referring to the sol in the two sols zirconium oxide weight), the mass fraction of yttrium oxide is 4% of the zirconium oxide weight (referring to the zirconium oxide weight sum in the two sols) for the preparation of raw materials, the first sol is aluminum Zirconium sol, the second sol is yttrium-zirconium sol, which is hydrolyzed into sols with ammonia water respectively, and then mixed. The temperature of the hydrolysis process is controlled at 60 ° C, and the pH is controlled during the dripping of ammonia water to 9;

[0052] Preparation of sol of composite nanopowder:

[0053] After obtaining the mixed sol, adding the alumina powder with an average particle diameter of 200nm and the tit...

Embodiment 2

[0055] Preparation of mixed sols:

[0056] The nitrates of aluminum, zirconium, and cerium were prepared as mixed sols according to the combination of aluminum nitrate + zirconium nitrate, yttrium nitrate + zirconium nitrate, and the mass ratio of aluminum to zirconium oxide was (3:1) (referring to the sol in the two sols zirconium oxide weight), the mass fraction of yttrium oxide is 5% of the zirconium oxide weight (referring to the zirconium oxide weight sum in the two sols) for the preparation of raw materials, the first sol is aluminum Zirconium sol, the second sol is yttrium-zirconium sol, which is hydrolyzed into sols with ammonia water respectively, and then mixed. The temperature of the hydrolysis process is controlled at 60 ° C, and the pH is controlled during the dripping of ammonia water to 9.5;

[0057] Preparation of sol of composite nanopowder:

[0058] After obtaining the mixed sol, add alumina powder with an average particle size of 100nm and titanium oxide po...

Embodiment 3

[0060] Preparation of mixed sols:

[0061] The nitrates of aluminum, zirconium, and cerium were prepared as mixed sols according to the combination of aluminum nitrate + zirconium nitrate, yttrium nitrate + zirconium nitrate, and the mass ratio of aluminum to zirconium oxide was (1:1) (referring to the sol in the two sols zirconium oxide weight), the mass fraction of yttrium oxide is 6% of the zirconium oxide weight (referring to the zirconium oxide weight sum in the two sols) for the preparation of raw materials, the first sol is aluminum Zirconium sol, the second sol is yttrium-zirconium sol, which is hydrolyzed into sols with ammonia water respectively, and then mixed. The temperature of the hydrolysis process is controlled at 60 ° C, and the pH is controlled during the dripping of ammonia water to 9.5;

[0062] Preparation of sol of composite nanopowder:

[0063] After obtaining the mixed sol, add alumina powder with an average particle size of 100nm and titanium oxide po...

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Abstract

The invention relates to a method for preparing a wear-resistant ceramic membrane by a sol method, and belongs to the field of membrane materials. The steps are as follows: 1) The coating solution involved in the preparation method is a mother solution obtained by hydrolysis of aluminum, zirconium nitrate and one or more rare earth nitrates such as yttrium, cerium, lanthanum, etc. It is formed by suspending powder and organic additives. 2) The film layer formed by this coating liquid must be baked at 800~1350℃ for 0.5~3h. The ceramic film layer obtained by this process not only has good continuity and no defects, but also has high strength, excellent wear resistance and impact resistance, strong acid and alkali corrosion resistance, low production cost, simple process and easy control.

Description

technical field [0001] The invention relates to a method for preparing a wear-resistant ceramic film, in particular to a method for preparing a wear-resistant ceramic film by a sol method, and belongs to the field of film materials. Background technique [0002] In the process of ceramic membrane preparation, the quality of the membrane layer is the key to whether the ceramic membrane can achieve the purpose of separation. It not only requires the membrane layer to have high separation accuracy, narrow pore size distribution, continuous integrity without defects, good adhesion with the support layer or transition layer, and excellent acid and alkali resistance, but also requires the membrane layer to have high strength and wear resistance. In special material-liquid separation, especially in systems with high viscosity and high concentration, high membrane surface velocity or high degree of turbulence are often required to weaken the concentration polarization and membrane ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/02B01D67/00B01D61/00
CPCB01D61/00B01D67/0041B01D71/02B01D71/022B01D71/024B01D71/025
Inventor 唐礼升王志高吕承
Owner 南京钛净流体技术有限公司
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