| Summary: | 碩士 === 國立臺北科技大學 === 材料科學與工程研究所 === 107 === In this work, Alumina/Copper chromium oxide (Al2O3 - CuCrO2) core-shell structure was prepared by CuCrO2 precursor. Initially, CuCrO2 precursor solution was mixed by copper acetate, chromium acetate, ethanolamine and ethylene glycol methyl ether. And the commercial Alumina (Al2O3) microspheres were used as a template. The Al2O3 microspheres were dipped in the CuCrO2 precursor solution, then mainly depositing copper chromium ions on the surface of Al2O3 microspheres. The deposition Al2O3 microspheres was dried at the 150˚C hotplate for 4 min and then cooled down for 3 min. This procedure was performed with 5 cycles to obtain the desired thickness. The sample were annealed with two-step. First step was in the hydrogen (10%) and nitrogen (90%) atmosphere risen to 400˚C (rise rate10˚C/min) for 15 minutes, and then second step, the forming gas was switched to a pure nitrogen, and risen to 600˚C (rise rate10˚C/min) annealed for 1 hour to obtain the Al2O3-CuCrO2 core-shell structure. XRD analysis showed that the peak of CuCrO2 and Al2O3 appear. It could be seen through the SEM image that the top view presented the Al2O3 - CuCrO2 core-shell structure.
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