Charged ceramic membrane and preparation method thereof

A ceramic membrane and charging technology, applied in the field of ceramic materials, can solve the problems of harsh preparation process and high cost, and achieve the effect of reducing sintering temperature and energy consumption

Active Publication Date: 2019-03-29
萍乡市普天高科实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of charged ceramic membrane still has problems such as high cost and harsh preparation process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The invention provides a charged ceramic membrane, which composition includes the following components in parts by weight: 50 parts of cordierite (wherein 10 wt% is nano cordierite), 10 parts of silicon carbide, 3 parts of α-alumina, 1 part of neodymium oxide parts, 3 parts of titanium oxide, 5 parts of polyethyleneimine, 20 parts of polyvinyl alcohol, 0.1 part of chitosan, and the film thickness is 5 μm.

[0026] The preparation method of the above-mentioned charged ceramic membrane comprises the following steps:

[0027] S1. In addition to preparing all the film layer slurry of the charging agent, 90wt% (mass percentage) of the above raw materials is used to prepare the ceramic membrane support body slurry, and 10wt% is used to prepare the film layer slurry;

[0028] S2. Preparation of ceramic membrane support slurry: take cordierite, silicon carbide, α-alumina, neodymium oxide, and titanium oxide and mix them in proportion and put them into a ball mill for ball milli...

Embodiment 2

[0036] The invention provides a charged ceramic membrane, which composition includes the following components in parts by weight: 70 parts of cordierite (20 wt% of which is nano cordierite), 15 parts of silicon carbide, 6 parts of α-alumina, 3 parts of neodymium oxide 1 part, 5 parts of titanium oxide, 10 parts of polyethyleneimine, 30 parts of polyvinyl alcohol, 1 part of yeast dextran, and the thickness of the film layer is 8 μm.

[0037] The preparation method of the above-mentioned charged ceramic membrane comprises the following steps:

[0038] S1. In addition to preparing all the film layer slurry of the charging agent, 90wt% (mass percentage) of the above raw materials is used to prepare the ceramic membrane support body slurry, and 10wt% is used to prepare the film layer slurry;

[0039]S2. Preparation of ceramic membrane support slurry: take cordierite, silicon carbide, α-alumina, neodymium oxide, and titanium oxide and mix them in proportion, put them into a ball mil...

Embodiment 3

[0047] The invention provides a charged ceramic membrane, which composition includes the following components in parts by weight: 60 parts of cordierite (15 wt% of which is nano cordierite), 12 parts of silicon carbide, 5 parts of α-alumina, 2 parts of neodymium oxide parts, 4 parts of titanium oxide, 8 parts of polyethyleneimine, 25 parts of polyvinyl alcohol, 0.5 parts of zirconia, and the film thickness is 3 μm.

[0048] The preparation method of the above-mentioned charged ceramic membrane comprises the following steps:

[0049] S1. In addition to preparing all the film layer slurry of the charging agent, 90wt% (mass percentage) of the above raw materials is used to prepare the ceramic membrane support body slurry, and 10wt% is used to prepare the film layer slurry;

[0050] S2. Preparation of ceramic membrane support slurry: take cordierite, silicon carbide, α-alumina, neodymium oxide, and titanium oxide in proportion and mix them in a ball mill for 28 hours, then add pol...

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Abstract

The invention discloses a charged ceramic membrane. The ceramic membrane includes, by weight, 50-70 parts of cordierite, 10-15 parts of silicon carbide, 3-6 parts of alpha-aluminum oxide, 1-3 parts ofneodymium oxide, 3-5 parts of titanium oxide, 5-10 parts of polyethyleneimine, 20-30 parts of polyvinyl alcohol, and 0.1-1 part of a charge agent. The charged ceramic membrane can be prepared by adopting an isostatic compaction method and an immersion method. Through the proportion of each component and the temperature control of each phase during sintering, sintering temperatures can be reducedby adding the alpha-aluminum oxide, the neodymium oxide and the titanium oxide, and the bonding strength of the cordierite and the silicon carbide can be enhanced, so that a double-layer pore structure can be formed, and a high intensity support body and membrane can be obtained; and the porosity of the prepared charged ceramic membrane can reach 45%, and the intensity can reach 20 MPa.

Description

technical field [0001] The invention relates to a ceramic material, in particular to a charged ceramic membrane and a preparation method thereof. Background technique [0002] Ceramic membrane is a kind of inorganic membrane, which belongs to the solid membrane material in membrane separation technology. Fired. The ceramic membrane for separation usually has a three-layer structure: a support body (also known as a carrier layer), a transition layer (also known as an intermediate layer), and a membrane layer (also known as a separation layer). The function of the support layer is to increase the mechanical strength of the membrane; the intermediate layer The pore diameter of the layer is smaller than that of the support layer, and its function is to prevent the particles from penetrating into the porous support layer during the preparation of the membrane layer; the membrane layer has a separation function. The pore size distribution of the entire membrane gradually decreas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/195C04B35/622C04B35/64
CPCC04B35/195C04B35/62218C04B35/64C04B2235/3217C04B2235/3224C04B2235/3225C04B2235/3232C04B2235/3244C04B2235/3826C04B2235/6562C04B2235/6567C04B2235/661C04B2235/96
Inventor 刘绍辉黄乃乔袁明辉
Owner 萍乡市普天高科实业有限公司
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