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Preparation method of alumina-based porous ceramic material

A technology of porous ceramics and alumina, applied in the field of preparation of porous ceramic materials, can solve the problems of complex preparation process, high sintering temperature and low porosity, etc., and achieve the effects of simple preparation process, lower sintering temperature and broad application prospects.

Pending Publication Date: 2021-04-09
罗焕焕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when preparing alumina porous ceramics, the sintering temperature is high, resulting in increased energy consumption and cost. When the porosity of alumina porous ceramic materials is high, the corresponding strength is low. It is difficult to have both, and the fracture toughness of alumina porous ceramics still needs to be improved
[0004] At present, in order to prepare low-cost, high-porosity ceramic materials, there is patent document 1 (CN103232228A) that uses diatomite as a pore-forming agent to produce ceramic materials with high porosity, but the sintering temperature does not decrease, and the overall performance is also low. not satisfactory
Although patent document 2 (CN104130004A) has good flexural strength, the preparation process is complicated, the porosity is not high, and the toughness is poor, there is still room for further improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1, a kind of preparation method of alumina-based porous ceramic material, comprises the following steps:

[0028] (1) Prepare raw materials: by mass percentage, in the raw materials, the content of alumina powder is 35%, the content of binder is 6%, the content of sintering aid is 2%, and the content of pore-forming agent is 2%. 57%, the sum of the mass percentages of the above components is 100%, wherein the binder is phenolic resin, and the sintering aid is composed of CaO and ZrO 2 Composition, CaO, ZrO in sintering aid 2 The mass ratio is 2:1; the pore-forming agent is ultrafine polymethyl methacrylate powder; the particle size of alumina powder is 200nm; the particle size of ultrafine polymethyl methacrylate powder is 10um;

[0029] (2) weighing the above-mentioned components by mass percentage, after mixing the alumina powder, sintering aid and binder, performing ball milling, and drying the first mixture obtained after ball milling to obtain the secon...

Embodiment 2

[0034] Embodiment 2, a kind of preparation method of alumina-based porous ceramic material, comprises the following steps:

[0035] (1) Prepare raw materials: by mass percentage, in the raw materials, the content of alumina powder is 50%, the content of binder is 2%, the content of sintering aid is 0.5%, and the content of pore-forming agent is 47.5%, the sum of the mass percentages of the above components is 100%, wherein the binder is phenolic resin, and the sintering aid is composed of CaO and ZrO 2 Composition, CaO, ZrO in sintering aid 2 The mass ratio is 1:3; the pore-forming agent is ultrafine polymethyl methacrylate powder; the particle size of alumina powder is 20nm; the particle size of ultrafine polymethyl methacrylate powder is 80um;

[0036] (2) weighing the above-mentioned components by mass percentage, after mixing the alumina powder, sintering aid and binder, performing ball milling, and drying the first mixture obtained after ball milling to obtain the second...

Embodiment 3

[0041] Embodiment 3, a kind of preparation method of alumina-based porous ceramic material, comprises the following steps:

[0042] (1) Prepare raw materials: by mass percentage, in the raw materials, the content of alumina powder is 45%, the content of binder is 6%, the content of sintering aid is 1%, and the content of pore-forming agent is 1%. 48%, the sum of the mass percentages of the above components is 100%, wherein the binder is phenolic resin, and the sintering aid is composed of CaO and ZrO 2 Composition, CaO, ZrO in sintering aid 2 The mass ratio is 2:1; the pore-forming agent is ultrafine polymethyl methacrylate powder; the particle size of alumina powder is 200nm; the particle size of ultrafine polymethyl methacrylate powder is 10um;

[0043] (2) weighing the above-mentioned components by mass percentage, after mixing the alumina powder, sintering aid and binder, performing ball milling, and drying the first mixture obtained after ball milling to obtain the secon...

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Abstract

The invention relates to a preparation method of a porous ceramic material, in particular to a preparation method of an alumina-based porous ceramic material, which comprises the following steps: preparing the following raw materials in percentage by weight: 35-50% of aluminum oxide powder, 2-6% of binder and 0.5-2% of sintering aid, wherein the content of the pore-forming agent is 42-65%, the sum of the mass percentages of the components is 100%, the binder is phenolic resin, the sintering aid is CaO and ZrO2, and the pore-forming agent is ultrafine polymethyl methacrylate powder; and carrying out ball milling and mixing, pressing the mixture into a blank, and sintering and cooling the blank to obtain the alumina-based porous ceramic material. By adopting a proper preparation process, the alumina-based porous ceramic material is low in sintering temperature, simple in process and low in cost, and also has high porosity and good toughness.

Description

technical field [0001] The invention relates to a preparation method of a porous ceramic material, in particular to a preparation method of an alumina-based porous ceramic material. Background technique [0002] Porous ceramic materials have the excellent properties of ceramic substrates, as well as large porosity, adjustable pore size, pore distribution, etc., and have excellent electrical, thermal, and magnetic properties. Due to their excellent properties, porous ceramic materials are widely used in In environmental protection, metallurgy, energy, cement and other fields, porous ceramic materials have also attracted more and more attention. [0003] Alumina-based porous ceramic materials are the most widely used porous ceramic materials. They have good heat resistance, excellent chemical stability, and high hardness. Alumina-based porous ceramic materials are often used to filter molten metal, and also It can be used as a sensor material, and can also be used as a sound-...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B35/10C04B35/622C04B35/634C04B35/64
CPCC04B38/067C04B35/10C04B35/622C04B35/63476C04B35/64C04B2235/6567C04B2235/96C04B38/0074
Inventor 不公告发明人
Owner 罗焕焕