Preparation method of high-porosity black porous metal film
A metal thin film, high porosity technology, applied in the direction of metal rolling, can solve the problems of inability to precisely control the size and difficult to form a metal thin film, and achieve the effect of improving the photothermal conversion efficiency, reducing the preparation cost, and high-efficiency solar steam conversion.
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Embodiment 1
[0033] A method for preparing a high-porosity black porous Au film:
[0034](1) According to Cu 98 Au 2 (at.%) atomic ratio, calculate and weigh the pure metal raw material, material A is Cu, material B is Au;
[0035] (2) Put the weighed pure Cu and pure Au blocks into a vacuum electric arc furnace, and evacuate the furnace to 5×10 -3 Pa, then filled with argon with a purity of 99.999% to 0.1MPa, repeated vacuuming and filling with argon three times, and filled with argon to about 0.3MPa for the last time, and then smelted. The current is controlled at 5 amperes, the time is 5 minutes, and the melting is repeated 3 to 4 times to obtain an alloy ingot;
[0036] (3) Put the alloy ingot into a tube furnace, heat it to 800° C. under an argon atmosphere, keep it warm for 5 hours, and perform homogenization annealing treatment. Then place the annealed alloy ingot on a rolling mill, first roll the sample directly to a thickness of 5 mm, then reduce it by 0.1 mm each time, roll i...
Embodiment 2
[0046] A method for preparing a high-porosity black porous Au film:
[0047] (1) According to Cu 99.99 Au 0.01 (at.%) atomic ratio, calculate and weigh the pure metal raw material;
[0048] (2) Put the weighed pure Cu and pure Au blocks into a vacuum electric arc furnace, and evacuate the furnace to 5×10 -3 Pa, then filled with argon with a purity of 99.999% to 0.1MPa, repeated vacuuming and filling with argon three times, and filled with argon to about 0.3MPa for the last time, and then smelted. The current is controlled at 5 amperes, the time is 5 minutes, and the melting is repeated 3 to 4 times to obtain an alloy ingot;
[0049] (3) Put the alloy ingot into a tube furnace, heat it to 800° C. under an argon atmosphere, keep it warm for 5 hours, and perform homogenization annealing treatment. Then the annealed alloy ingot is placed on a rolling mill, and the sample is directly rolled to a thickness of 5 mm;
[0050] (4) Put the rolled alloy foil into a tubular furnace, ...
Embodiment 3
[0053] A method for preparing a high-porosity black porous Au film:
[0054] (1) According to Cu 85 Au 15 (at%) atomic ratio, calculate and weigh the pure metal raw material;
[0055] (2) Put the weighed pure Cu and pure Au blocks into a vacuum electric arc furnace, and evacuate the furnace to 5×10 -3 Pa, then filled with argon with a purity of 99.999% to 0.1MPa, repeated vacuuming and filling with argon three times, and filled with argon to about 0.3MPa for the last time, and then smelted. The current is controlled at 5 amperes, the time is 5 minutes, and the melting is repeated 3 to 4 times to obtain an alloy ingot;
[0056] (3) Put the alloy ingot into a tube furnace, heat it to 800° C. under an argon atmosphere, keep it warm for 5 hours, and perform homogenization annealing treatment. Then place the annealed alloy ingot on a rolling mill, first roll the sample directly to a thickness of 5 mm, then reduce it by 0.1 mm each time, and roll it about 10 times each time, whe...
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