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Porous ceramic material pore-forming agent and preparation method thereof

A technology of porous ceramics and pore-forming agent, which is applied in the field of porous ceramic material pore-forming agent and its preparation, can solve the problems of difficult removal of inorganic pore-forming agent, difficulty in maintaining pore shape, influence of ceramic main body, etc., and achieves low cost and acceptable shape. Control, no bad residue effect

Pending Publication Date: 2021-04-20
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the pore-forming agents of porous ceramics mainly include organic additives and inorganic additives. Organic pore-forming additives have the advantages of no residue after sintering, but there is an obvious problem that their gasification temperature is low during sintering. It is difficult to maintain the shape of the pores during the process. The inorganic pore-forming agent is just the opposite and can maintain the shape of the pores. However, the residues of the inorganic pore-forming agent are difficult to remove, which will have a greater impact on the ceramic body.

Method used

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  • Porous ceramic material pore-forming agent and preparation method thereof
  • Porous ceramic material pore-forming agent and preparation method thereof
  • Porous ceramic material pore-forming agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) heat-treat rice husks at 600° C. for 4 hours in an air atmosphere, and cool to room temperature with the furnace to obtain the first product;

[0034] (2) Put the first product into a planetary ball mill for crushing, then pass through a 5000-mesh sieve to obtain the second product;

[0035] (3) The second product is spray-dried and granulated, first passed through a 300-mesh sieve, and then passed through a 325-mesh material, and the obtained non-permeable material is the porous ceramic material with a particle size of 40-50 μm for pore making The agent is detected by X-ray photoelectron spectroscopy and consists of: carbon 27wt%, silicon dioxide 67.4wt%, calcium chloride 2.2wt%, ferric chloride 0.1wt% and potassium chloride 3.3wt%; the planetary formula The parameters of the ball mill are: the distribution balls are 6mm ceramic balls, the speed ratio: rotation:revolution is 2:1, the revolution speed is 200rpm, and the ball milling time is 12h; The feed speed is 5...

Embodiment 2

[0038] (1) heat-treat rice husks at 600°C for 2.5 hours in an air atmosphere, and cool to room temperature with the furnace to obtain the first product;

[0039] (2) Put the first product into a planetary ball mill for crushing, then pass through a 5000-mesh sieve to obtain the second product;

[0040] (3) The second product is spray-dried and granulated, first passed through a 300-mesh sieve, and then passed through a 325-mesh material, and the obtained non-permeable material is the porous ceramic material with a particle size of 40-50 μm for pore making The agent is detected by X-ray photoelectron spectroscopy and consists of: carbon 28wt%, silicon dioxide 66.4wt%, calcium chloride 2.18wt%, ferric chloride 0.12wt% and potassium chloride 3.3wt%; the above-mentioned planet The parameters of the type ball mill are: the matching balls are 6mm ceramic balls, the speed ratio: rotation:revolution is 2:1, the revolution speed is 200rpm, and the ball milling time is 12h; the process ...

Embodiment 3

[0043] (1) heat-treat rice husks at 600° C. for 1 hour in an air atmosphere, and cool to room temperature with the furnace to obtain the first product;

[0044] (2) Put the first product into a planetary ball mill for crushing, then pass through a 5000-mesh sieve to obtain the second product;

[0045] (3) The second product is spray-dried and granulated, first passed through a 300-mesh sieve, and then passed through a 325-mesh material, and the obtained non-permeable material is the porous ceramic material with a particle size of 40-50 μm for pore making Agent, which is composed of 28.5wt% carbon, 65.9wt% silicon dioxide, 2.18wt% calcium chloride, 0.12wt% iron trichloride and 3.3wt% potassium chloride by X-ray photoelectron spectroscopy; The parameters of the type ball mill are: the matching balls are 6mm ceramic balls, the speed ratio: rotation:revolution is 2:1, the revolution speed is 200rpm, and the ball milling time is 12h; the process parameters of the above spray drying...

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Abstract

The invention discloses a porous ceramic material pore-forming agent and a preparation method thereof, the raw material is rice husk, and the raw material contains 27-28.5 wt% of carbon, 65.9-67.5 wt% of silicon dioxide, 2.1-2.3 wt% of calcium chloride, 0.1-0.15 wt% of iron trichloride and 3.2-3.4 wt% of potassium chloride. According to the preparation method, natural substance rice husks are subjected to high-temperature treatment to form carbide, and the formed carbide is granulated after being crushed and sieved to form pore-forming agent particles. Compared with an organic pore-forming additive and an inorganic pore-forming additive, the pore-forming additive has the characteristics of controllable shape, no adverse residue after sintering and the like.

Description

technical field [0001] The invention belongs to the technical field of organic materials, and in particular relates to a pore-forming agent for porous ceramic materials and a preparation method thereof. Background technique [0002] Porous ceramics have the advantages of high porosity, good strength, stable physical and chemical properties, high filtration precision and good regeneration performance. Open porous ceramics have good functions of adsorption, filtration, and echo elimination, while closed porous ceramics have good barrier effects on the transmission of heat, sound, and solid and liquid particles. Porous ceramics have been widely used in carrier, filtration and separation, sound absorption, heat insulation, bioengineering and new energy materials, etc. The shape, size, distribution and porosity of pores in porous ceramic materials seriously affect the performance of porous materials. [0003] In the prior art, there are various pore-forming methods of porous cer...

Claims

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Application Information

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IPC IPC(8): C04B38/06
Inventor 陆静王艳辉马忠强
Owner HUAQIAO UNIVERSITY
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