Abstract
Blackish amorphous aluminium oxide film on AlY10 amorphous alloy ribbons was prepared by anodic polarization process in H2SO4 solutions, showing electric storage on uneven surfaces with a convexity of 18 nm in diameter. The longest discharging time was obtained by current ratio (I2/I1) of 0.4 at 16 V and 5 mass% H2SO4. The discharging time increases and decreases with increasing charging time and charging current, and then saturates after around 100 s and 1 μA, respectively. The resulting film shows a vertical line after Warburg region in a Nyquist diagram, rapid increases in the imaginary impedance, and a phase angle of −90° at 1 mHz in the Bode diagram, demonstrating evidence for use in an electric distributed constant circuit. The film indicates a switching effect for both positive (∼+8.6 eV) and negative (∼-11.2 eV) potentials.
Original language | English |
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Pages (from-to) | 757-762 |
Number of pages | 6 |
Journal | Journal of Alloys and Compounds |
Volume | 776 |
DOIs | |
Publication status | Published - 2019 Mar 5 |
Keywords
- Anodic oxidization
- Blackish amorphous alumina
- Capacitive
- Nanometer-size cavities
- Properties
- Quantum size effect
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry