Porous aluminum body and manufacturing method therefor
a technology of porous aluminum and manufacturing methods, which is applied in the direction of cell components, electrochemical generators, transportation and packaging, etc., can solve the problems of difficult to obtain a porous body with high porosity and difficult to perform continuous and highly efficient manufacturing as a whol
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first embodiment
[0027]FIG. 1 to FIG. 4 illustrate a first embodiment of the porous aluminum body of the present invention.
[0028]A plurality of aluminum fibers 1 are mutually connected and integrated and formed into a plate shape, thus obtaining the porous aluminum body. Here, the aluminum fibers 1 each have an average wire diameter of 40 to 300 μm (preferably 50 to 100 μm) and a length of 0.2 to 20 mm (preferably 1 to 10 mm).
[0029]Here, the aluminum fibers 1 each have, on an outer peripheral surface thereof, a plurality of columnar protrusions 2 protruding outward from the outer peripheral surface. These columnar protrusions 2 are formed at intervals in 5 to 100 places per 100 μm in length of the aluminum fibers. Further, the columnar protrusions 2 each have a smaller diameter than the aluminum fibers 1 and a length protruding outward from the outer peripheral surface of 1 to 500 μm.
[0030]Further, at least the tip part of each columnar protrusion 2 is formed of a compound including titanium and alu...
second embodiment
[0046]FIG. 5A to FIG. 5C illustrate a second embodiment of the porous aluminum body according to the present invention.
[0047]This porous aluminum body is different from that shown in the first embodiment in that, although a plurality of aluminum fibers 1 are mutually connected and integrated in the same manner as shown in the first embodiment, the porous aluminum body is formed into a bulk shape such as a columnar shape, a cylindrical shape, and a rectangular plate shape.
[0048]Here, a method for manufacturing the above porous aluminum body will be described. Also in this manufacturing method, titanium powder, titanium hydride powder, or a mixed powder thereof each having an average particle size of 1 to 50 μm (preferably 5 to 30 μm) (hereinafter generically referred to as titanium powder 3) is added to a large number of aluminum fibers 1 having an average wire diameter of 40 to 300 μm (preferably 50 to 200 μm) and a length of 0.2 to 20 mm (preferably 1 to 10 mm) followed by mixing t...
examples
[0051]A porous aluminum body was manufactured by the method for manufacturing a porous aluminum body shown in the first embodiment.
[0052]First, 5% by weight of titanium hydride (TiH2) having an average particle size of 10 μm was added to aluminum fibers having an average wire diameter of 50 μm to prepare premixed fibers, and then the premixed fibers are wet-blended with a cellulose binder followed by drying to obtain a product, which was used as premixed fibers.
[0053]Then, the premixed fibers were uniformly spread on a carbon sole plate to obtain a filled layer having a thickness of about 1 mm in the state of bulk-filling. Next, the premixed fibers on the carbon sole plate were sintered at 658° C. for 10 minutes in an argon gas atmosphere at a dew point of −65° C. or less to prepare a porous aluminum body.
[0054]FIG. 6 to FIG. 9 are each a microscope photograph of a porous aluminum body manufactured in this way.
[0055]These photographs reveal that the resulting porous aluminum body co...
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Abstract
Description
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