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a ti 2 alc porous material and preparation method thereof

A technology of porous materials and mixed powders, applied in separation methods, chemical instruments and methods, ceramic products, etc., can solve the problems of pore-forming agent residue and uneven pore distribution, and achieve high porosity and no pore-forming agent residue , Simple and convenient operation

Active Publication Date: 2021-08-13
WUHAN POLYTECHNIC UNIVERSITY
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Problems solved by technology

[0006] The invention provides a Ti 2 AlC porous material and preparation method thereof, aimed at improving Ti 2 In the preparation process of AlC porous materials, there are problems of pore-forming agent residue and uneven pore distribution, and at the same time, it provides a Ti material with excellent tensile strength and corrosion resistance suitable for filtration membrane separation. 2 AlC porous material

Method used

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  • a ti <sub>2</sub> alc porous material and preparation method thereof
  • a ti <sub>2</sub> alc porous material and preparation method thereof
  • a ti <sub>2</sub> alc porous material and preparation method thereof

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preparation example Construction

[0026] A kind of Ti 2 The preparation method of AlC porous material comprises:

[0027] S1. Mix titanium powder, aluminum powder and dry activated carbon powder evenly. The mass ratio of carbon powder to aluminum powder is 65-69:33. The ratio of dry activated carbon powder to the sum of the mass of carbon powder and aluminum powder 2~10:100.

[0028] Specifically, material preparation is performed first. Weigh titanium powder, aluminum powder, dry activated carbon powder and grinding balls so that the mass ratio of titanium powder to aluminum powder is 65-69:33, and the sum of the mass of dry activated carbon powder, carbon powder and aluminum powder The ratio is 2 to 10:100.

[0029] Then mix titanium powder, aluminum powder and dry activated carbon powder evenly. Preferably, in order to fully mix the titanium powder, aluminum powder and dry activated carbon powder to obtain a mixed powder, put the titanium powder, aluminum powder and dried activated carbon powder in a ba...

Embodiment 1

[0043] This embodiment provides a Ti 2 AlC porous material and its preparation method.

[0044] A kind of Ti 2 The preparation method of AlC porous material comprises: will weigh titanium powder 67g, aluminum powder 33g dry activated carbon powder 2g, titanium powder, aluminum powder and activated carbon powder are placed in ball mill and put into the grinding ball of 300g as medium, mix Mix the materials for 8 hours, and mix them evenly to obtain a mixed powder. The particle sizes of the selected titanium powder and aluminum powder are both -200 mesh to +325 mesh. The particle size of the dry activated carbon powder is -800 mesh.

[0045] The mixed powder was placed in a Φ25mm mold, and a pressure of 190MPa was applied to it to form a green body.

[0046] Place the green body under vacuum conditions for sintering, raise the temperature to 190°C in the first stage at a heating rate of 9°C / min, and keep it for 3.3h, then raise the temperature to 560°C in the second stage at ...

Embodiment 2

[0048] This embodiment provides a Ti 2 AlC porous material and its preparation method.

[0049] A kind of Ti 2 The preparation method of AlC porous material comprises: will weigh titanium powder 67g, aluminum powder 33g dry activated carbon powder 4g, titanium powder, aluminum powder and activated carbon powder are placed in ball mill and put into the grinding ball of 310g as medium, mix Mix the materials for 8 hours, and mix them evenly to obtain a mixed powder. The particle sizes of the selected titanium powder and aluminum powder are both -200 mesh to +325 mesh. The particle size of the dry activated carbon powder is -800 mesh.

[0050] The mixed powder is placed in a Φ25mm mold, and a pressure of 220MPa is applied to it to form a green body.

[0051] The green body was sintered under vacuum conditions, the temperature was raised to 200°C in the first stage at a heating rate of 10°C / min, and kept for 2 hours, and the temperature was raised to 600°C in the second stage at...

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Abstract

The invention relates to the field of preparation of porous materials and provides a Ti 2 AlC porous material and preparation method thereof, comprising: uniformly mixing titanium powder, aluminum powder and dry activated carbon powder, the mass ratio of carbon powder to aluminum powder is 65-69:33, dry activated carbon powder and carbon powder and The mass ratio of the aluminum powder is 2-10:100; the mixed powder is pre-pressed to obtain a green body; the green body is heated to 190-210°C and kept for 1.8-2.2h; the temperature rise is less than 25°C / min Warm at a rate of 560-640°C, keep warm for 2.8-3.3h; then raise the temperature to 1280-1350°C at a heating rate of less than 25°C / min, and keep warm for 1-2h; cool to room temperature at a cooling rate of less than 18°C / min Ti 2 AlC porous material. The method is simple, and the obtained porous material has uniform pores, high porosity, and no problems such as pore-forming agent residue and green body deformation.

Description

technical field [0001] The invention relates to the technical field of preparation of porous materials, in particular to a Ti 2 AlC porous materials and methods for their preparation. Background technique [0002] Porous materials are a kind of materials with a network structure composed of interpenetrating or closed pores. Because of their good permeability, low density, and large specific surface area, they are widely used in metallurgy, chemical industry, environmental protection, biology, medicine, and shipbuilding. Ships, aerospace and other fields. At present, the commonly used porous materials are mainly divided into three categories: metal porous materials, ceramic porous materials and organic polymer porous materials. Organic polymer porous materials have excellent acid and alkali resistance, oxygen, moisture and other harsh conditions and high mechanical properties, but poor high temperature resistance; metal porous materials have excellent mechanical properties,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/56C04B35/626C04B35/64C04B38/00B01D39/20
CPCB01D39/2034B01D39/2062C04B35/56C04B35/6261C04B35/64C04B38/00C04B2235/402C04B2235/404C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/661C04B38/0074C04B38/0058
Inventor 杨军胜刘羽祚阳学进李喜德熊烈强
Owner WUHAN POLYTECHNIC UNIVERSITY
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