Abstract
Anodic oxide films with nanocrystalline tetragonal ZrO2 precipitated in an amorphous oxide matrix were formed on Zr-Si and Zr-Al alloys and had significantly enhanced capacitance in comparison with those formed on zirconium metal. The capacitance enhancement was associated with the formation of a high-temperature stable tetragonal ZrO2 phase with high relative permittivity as well as increased ionic resistivity, which reduces the thickness of anodic oxide films at a certain formation voltage. However, there is a general empirical trend that single-phase materials with higher permittivity have lower ionic resistivity. This study presents a novel material design based on a nanocrystalline-amorphous composite anodic oxide film for capacitor applications.
Original language | English |
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Pages (from-to) | 2665-2670 |
Number of pages | 6 |
Journal | ACS Applied Materials and Interfaces |
Volume | 3 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2011 Jul 27 |
Keywords
- ZrO
- anodic oxide
- capacitor
- dielectric film
- nanocomposite oxide
ASJC Scopus subject areas
- Materials Science(all)