Three-dimensional reticular high-porosity metal fiber sintered felt

Abstract

The utility model relates to the technical field of filtering materials, and discloses a three-dimensional net-shaped high-porosity metal fiber sintered felt which comprises a metal sintered felt body, the metal sintered felt body comprises a protective layer, a metal crude fiber layer is sintered at the bottom end of the protective layer, a metal fine fiber layer is sintered at the bottom end of the metal crude fiber layer, and a nanometer layer is sintered at the bottom end of the metal fine fiber layer. A ceramic layer is sintered at the bottom end of the nano layer, and a protective layer is sintered at the bottom end of the ceramic layer. The three-dimensional reticular high-porosity metal fiber sintered felt overcomes the defects that a porous organic polymer material of an existing sintered felt is low in strength and is not resistant to high temperature, a metal net is easy to break, powder is easy to break during sintering, flow is small, filter paper and filter cloth are not resistant to temperature and pressure, and the like. And the method has wide application in various high-tech technical fields.

Description

Technical Field

[0001] The present application relates to the technical field of filter materials, and in particular to a three-dimensional mesh high-porosity metal fiber sintered felt. Background Art

[0002] Metal fiber sintered felt is made of metal fibers with a diameter of micron level through non-woven laying, stacking and high-temperature sintering. Multi-layer metal fiber felt forms a pore gradient with different pore diameter layers, which can be controlled to obtain extremely high filtration accuracy and greater dirt holding capacity than single-layer felt.

[0003] The existing metal sintered felt has the disadvantages of low strength and high temperature resistance of porous organic polymer materials, easy breakage of metal mesh, sintered powder, small flow rate, and poor heat and pressure resistance of filter paper and filter cloth. Utility Model Content

[0004] In order to solve the problem, the present application provides a three-dimensional mesh high-porosity metal fiber sintered felt.

[0005] The three-dimensional mesh high-porosity metal fiber sintered felt provided in this application adopts the following technical solution:

[0006] A three-dimensional mesh high-porosity metal fiber sintered felt comprises a metal sintered felt, wherein the metal sintered felt comprises a protective layer, a metal coarse fiber layer is sintered at the bottom end of the protective layer, a metal fine fiber layer is sintered at the bottom end of the metal coarse fiber layer, a nano layer is sintered at the bottom end of the metal fine fiber layer, a ceramic layer is sintered at the bottom end of the nano layer, and a protective layer is sintered at the bottom end of the ceramic layer.

[0007] Preferably, the surface of the protective layer is coated with a polytetrafluoroethylene protective film.

[0008] Preferably, the diameter of the metal coarse fiber layer can be less than 50 μm, and the diameter of the metal fine fiber layer can be less than 10 μm.

[0009] Preferably, the metal coarse fiber layer and the metal fine fiber layer are formed by sintering a mixture of stainless steel fibers and pure nickel powder.

[0010] Preferably, the diameter of the nano layer is less than 50 nm, and the diameter of the ceramic layer is less than 30 μm.

[0011] In summary, this application includes the following beneficial technical effects:

[0012] 1. Metal sintered felt is made by mixing and sintering stainless steel fiber and pure nickel powder, and is divided into metal coarse fiber layer and metal fine fiber layer. Stainless steel fiber has good corrosion resistance and mechanical strength, while pure nickel powder has high electrical conductivity and thermal conductivity. The mixed sintered metal sintered felt has both the corrosion resistance of stainless steel fiber and the electrical conductivity and thermal conductivity of pure nickel powder. The surface of the metal sintered felt protective layer 2 is coated with a polytetrafluoroethylene (PTFE) protective film to further stabilize the metal sintered felt in high temperature and corrosive environments.

[0013] 2. A nano layer is sintered at the bottom of the metal fine fiber layer. The introduction of the nano layer can increase the surface active sites and adsorption capacity of the metal fine fiber layer, thereby improving the filtration efficiency and selectivity. A ceramic layer is sintered at the bottom of the nano layer. The introduction of the ceramic layer is mainly used to improve the high temperature resistance and corrosion resistance of the metal fiber, and can also improve the mechanical and physical properties of the metal sintered felt.

[0014] 3. Metal sintered felt has the structural characteristics of three-dimensional mesh porous structure, high-precision fully connected pore size, high porosity, and large specific surface area. The porosity can be adjusted in the range of 60% to 98%. The three-dimensional mesh porous structure has a large number of gaps inside, allowing gas or liquid to flow freely in it. The high-precision fully connected pore size has complete connectivity, which can improve the electrical conductivity, thermal conductivity, gas or liquid fluidity and other properties of porous materials. The huge specific surface area can make more surface per unit volume available for adsorption and catalytic reactions. The porosity can be adjusted in the range of 60% to 98%, so that the metal sintered felt can sinter different pore sizes according to different environments to achieve better applicability. This metal sintered felt has a wide range of uses in various high-tech fields due to its special pore structure and excellent physical, mechanical, thermal, electrical and optical properties. It can be widely used in catalyst carriers, heat exchangers, porous metal electrodes, energy-saving heat pipes, clean energy conversion, surface combustion technology, buffer shock absorbers, high-temperature gas dust removal, automobile exhaust purification, fuel cells, biomedicine, high-temperature seals and wear-resistant components. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure from the first perspective of an embodiment of the application.

[0016] Explanation of the accompanying reference numerals: 1. metal sintered felt; 2. protective layer; 3. metal coarse fiber layer; 4. metal fine fiber layer; 5. nano layer; 6. ceramic layer. DETAILED DESCRIPTION

[0017] The following is combined with Figure 1 This application is described in further detail.

[0018] The present application embodiment discloses a three-dimensional mesh high-porosity metal fiber sintered felt. Figure 1 A three-dimensional mesh high-porosity metal fiber sintered felt comprises a metal sintered felt 1, the metal sintered felt 1 comprises a protective layer 2, a metal coarse fiber layer 3 is sintered at the bottom of the protective layer 2, a metal fine fiber layer 4 is sintered at the bottom of the metal coarse fiber layer 3, a nano layer 5 is sintered at the bottom of the metal fine fiber layer 4, a ceramic layer 6 is sintered at the bottom of the nano layer 5, and a protective layer 2 is sintered at the bottom of the ceramic layer 6;

[0019] Reference Figure 1 , the surface of the protective layer 2 is coated with a polytetrafluoroethylene (PTFE) protective film;

[0020] By adopting the above technical solution, PTFE has excellent temperature resistance and chemical stability, as well as excellent non-stickiness and wear resistance. The protective layer 2 is coated with a polytetrafluoroethylene (PTFE) protective film to enable the metal sintered felt 1 to remain stable in high temperature and corrosive environments.

[0021] Reference Figure 1 , the diameter of the metal coarse fiber layer 3 can be less than 50 μm, and the diameter of the metal fine fiber layer 4 can be less than 10 μm;

[0022] By adopting the above technical solution, the metal coarse fiber layer 3 has a larger diameter, which can provide better physical support and filtration efficiency, and is used to provide structural strength and support. The metal fine fiber layer 4 has a smaller diameter, has more surface area and pore structure, and can provide better adsorption and capture performance.

[0023] Reference Figure 1 The metal coarse fiber layer 3 and the metal fine fiber layer 4 are formed by mixing and sintering stainless steel fibers and pure nickel powder;

[0024] By adopting the above technical solution, the stainless steel fiber has good corrosion resistance and mechanical strength, while the pure nickel powder has high electrical conductivity and thermal conductivity. The mixed sintered metal sintered felt has both the corrosion resistance of stainless steel fiber and the electrical and thermal conductivity of pure nickel powder, and is suitable for various application fields.

[0025] Reference Figure 1 , the diameter of the nano layer 5 is less than 50 nm, and the diameter of the ceramic layer 6 is less than 30 μm;

[0026] By adopting the above technical solution, the introduction of the nanolayer 5 can increase the surface active sites and adsorption capacity of the metal fine fiber layer 4, thereby improving the filtration efficiency and selectivity. The introduction of the ceramic layer 6 is mainly used to improve the high temperature resistance and corrosion resistance of the metal fiber. Ceramic materials have a high melting point and thermal stability, and can form a protective layer to effectively isolate the metal fiber from the external environment, thereby improving its high temperature resistance and corrosion resistance and extending its service life. The metal fiber ceramic layer can also increase the mechanical strength and hardness of the metal fiber and improve its surface properties and electrical properties. In some special applications, the metal fiber ceramic layer can also be used as an anti-radiation layer, an electromagnetic wave shielding layer, or a biomedical material.

[0027] The implementation principle of a three-dimensional mesh high-porosity metal fiber sintered felt in the embodiment of the present application is as follows: the metal sintered felt 1 is formed by mixing and sintering stainless steel fiber and pure nickel powder, and is divided into a metal coarse fiber layer 3 and a metal fine fiber layer 4. The stainless steel fiber has good corrosion resistance and mechanical strength, while the pure nickel powder has high electrical conductivity and thermal conductivity. The metal sintered felt 1 after mixed sintering has both the corrosion resistance of stainless steel fiber and the electrical and thermal conductivity of pure nickel powder. The metal coarse fiber layer 3 has a larger diameter, can provide better physical support and filtration efficiency, and is used to provide structural strength and support. The metal fine fiber layer 4 has a smaller diameter, has more surface area and pore structure, and can provide better adsorption and capture performance.

[0028] A nanolayer 5 is sintered at the bottom of the metal fine fiber layer 4. The introduction of the nanolayer 5 can increase the surface active sites and adsorption capacity of the metal fine fiber layer 4, thereby improving the filtration efficiency and selectivity. A ceramic layer 6 is sintered at the bottom of the nanolayer 5. The introduction of the ceramic layer 6 is mainly used to improve the high temperature resistance and corrosion resistance of the metal fiber. Ceramic materials have a high melting point and thermal stability, and can form a protective layer to effectively isolate the metal fiber from the external environment, thereby improving its high temperature resistance and corrosion resistance and extending its service life. The gold ceramic layer 6 can also increase the mechanical strength and hardness of the metal fiber and improve its surface properties and electrical properties. In some special applications, the gold ceramic layer 6 can also be used as an anti-radiation layer, an electromagnetic wave shielding layer, or a biomedical material.

[0029] The metal sintered felt 1 has protective layers 2 sintered on the top and bottom, and the surface of the protective layer 2 is coated with a polytetrafluoroethylene (PTFE) protective film. PTFE has excellent temperature resistance and chemical stability, and also has excellent non-stickiness and wear resistance. The surface of the protective layer 2 is coated with a polytetrafluoroethylene (PTFE) protective film to enable the metal sintered felt 1 to remain stable in high temperature and corrosive environments.

[0030] The metal sintered felt 1 has the structural characteristics of a three-dimensional mesh porous structure, a high-precision fully connected pore size, a high porosity, and a large specific surface area. The porosity can be adjusted in the range of 60% to 98%. The three-dimensional mesh porous structure has a large number of gaps inside, allowing gas or liquid to flow freely therein. The high-precision fully connected pore size has complete connectivity, which can improve the electrical conductivity, thermal conductivity, gas or liquid fluidity and other properties of the porous material. The huge specific surface area can make more surface per unit volume available for adsorption and catalytic reactions. The porosity can be adjusted in the range of 60% to 98%, so that the metal sintered felt 1 can sinter different pore sizes according to different environments to achieve better applicability. Due to its special pore structure and excellent physical, mechanical, thermal, electrical and optical properties, this metal sintered felt 1 has a wide range of uses in various high-tech fields, and can be widely used in catalyst carriers, heat exchangers, porous metal electrodes, energy-saving heat pipes, clean energy conversion, surface combustion technology, buffer shock absorbers, high-temperature gas dust removal, automobile exhaust purification, fuel cells, biomedicine, high-temperature seals and wear-resistant components.

[0031] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0032] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0033] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A three-dimensional mesh high-porosity metal fiber sintered felt, comprising a metal sintered felt (1), characterized in that: The metal sintered felt (1) comprises a protective layer (2), a metal coarse fiber layer (3) is sintered at the bottom end of the protective layer (2), a metal fine fiber layer (4) is sintered at the bottom end of the metal coarse fiber layer (3), a nano layer (5) is sintered at the bottom end of the metal fine fiber layer (4), a ceramic layer (6) is sintered at the bottom end of the nano layer (5), and the protective layer (2) is sintered at the bottom end of the ceramic layer (6).

2. The three-dimensional high-porosity metal fiber sintered felt according to claim 1, characterized in that: The surface of the protective layer (2) is coated with a polytetrafluoroethylene (PTFE) protective film.

3. The three-dimensional high-porosity metal fiber sintered felt according to claim 1, characterized in that: The diameter of the metal coarse fiber layer (3) can reach less than 50 μm, and the diameter of the metal fine fiber layer (4) can reach less than 10 μm.

4. The three-dimensional mesh high-porosity metal fiber sintered felt according to claim 1, characterized in that: The metal coarse fiber layer (3) and the metal fine fiber layer (4) are formed by mixing and sintering stainless steel fibers and pure nickel powder.

5. The three-dimensional mesh high-porosity metal fiber sintered felt according to claim 1, characterized in that: The diameter of the nano layer (5) is less than 50 nm, and the diameter of the ceramic layer (6) is less than 30 μm.

Images