A preparation method of porous alumina and nico alloy composite film with iridescent color
A technology of porous alumina and composite film, applied in the fields of optics and magnetism, can solve the problems of complicated operation, high production cost, and reduce magnetocrystalline anisotropy, and achieve the effect of simple preparation process, easy operation and uniform color.
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Embodiment 1
[0029] Example 1 shows orange porous alumina with Ni 0.5 co 0.5 Preparation of Alloy Composite Thin Film
[0030] (1) The high-purity aluminum sheet (99.999%) is placed in a tube furnace and annealed at 500°C for 2.5 hours (argon is used as the protective gas) to eliminate the internal stress of the aluminum sheet;
[0031] (2) Put the annealed aluminum sheet into an acetone solution and ultrasonically clean it for 10 minutes to remove surface grease, then perform electropolishing for 5 minutes, clean the surface polishing solution with deionized water, and dry;
[0032] (3) Using graphite as the cathode, put the treated aluminum sheet into the oxalic acid solution (400ml, the concentration is 0.3mol / L) at 5°C as the anode for the first anodic oxidation, the oxidation voltage is 45V, and the oxidation time is 6h ;
[0033](4) Rinse the oxidized aluminum sheet with deionized water in step (3), and then put it into a mixed acid prepared by phosphoric acid solution (70g / L) and...
Embodiment 2
[0036] Example 2 shows orange porous alumina with Ni 0.9 co 0.1 Preparation of Alloy Composite Thin Film
[0037] Steps (1)-(4) are the same as in Example 1.
[0038] (5) Alternating-current electrodeposition of Ni in the porous alumina template prepared in step (4) 0.9 co 0.1 alloy. First weigh 2.95g (0.0105mol) of CoSO 4 ·7H 2 O, 24.84g (0.0945mol) of NiSO 4 ·6H 2 O, 15g (0.243mol) of H 3 BO 3 and 2.5g (0.014mol) of ascorbic acid are dissolved in deionized water to prepare 500ml electrolyte, and the porous alumina template is deposited in the electrolytic cell by alternating current, and the porous alumina template is used as the working electrode of the electrolytic cell, and graphite is the auxiliary electrode , and then pour the electrolyte solution configured above, and pass an alternating current to the electrolyte solution to obtain iridescent porous alumina and Ni 0.9 co 0.1 Alloy composite thin film; in the above deposition process, the deposition voltage...
Embodiment 3
[0044] Embodiment 3 Preparation of patterns composed of different colors on the same composite film
[0045] Steps (1)-(4) are the same as in Example 1.
[0046] (5) The porous alumina template prepared in step (4) is used as a mask to draw a pattern on the surface with ink, and it is corroded for 20min with a phosphoric acid solution of 70g / L with a concentration, then the ink is removed with acetone, and the porous alumina template is taken out and used Wash with deionized water and dry for later use; then weigh 2.95g (0.0105mol) of CoSO 4 ·7H 2 O, 24.84g (0.0945mol) of NiSO 4 ·6H 2 O, 15g (0.243mol) of H 3 BO 3 and 2.5g (0.014mol) of ascorbic acid were dissolved in deionized water to prepare 500ml of electrolyte solution, poured into the electrolytic cell for standby; finally, the porous alumina template was deposited in the electrolytic cell by alternating current, and the porous alumina template was immersed in the electrolytic cell. In the electrolyte in the tank, ...
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