The effect of hydration layers on the anodic growth and on the dielectric properties of Al2O3 for electrolytic capacitors
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- Authors:
- SCADUTO, G
SANTAMARIA, M
BOCCHETTA, P
DI QUARTO, F - Author Affiliations:
- Electrochemical Material Science Laboratory, Facoltà di Ingegneria, Università di Palermo, Viale delle Scienze, Ed. 6, 90128 Palermo, Italy
Dipartimento di Ingegneria dell'Innovazione, Università del Salento, via Monteroni, 73100 Lecce, Italy - Source:
- Thin solid films. 550:128-134
- Publication Date:
- 2014-01-01
- Language:
- English
- Abstract:
- Hydrous films were grown on high purity and cubicity Al foils for electrolytic capacitors in deionized water, ethylene glycol-deionized water and glycerol-deionized water at different immersion times. According to X-ray diffraction patterns the hydration treatment allowed growing a pseudo boehmite layer on Al surface whose morphology is appreciably affected by the bath composition. Capacitance measurements and photoelectrochemical findings suggest that a more compact barrier layer forms during the immersion in alcohol containing solutions. The hydration in water allowed saving energy and preparing more blocking oxide films. The beneficial effect of hydration in hot water on the specific capacitance was evidenced only for films formed at 300 V due to the crystallization of amorphous alumina in γ'-Al2O3.
- Notes:
- Electronics<br><br>Physics and materials science<br><br>Physics of condensed state: structure, mechanical and thermal properties
- Subjects:
- Crystallography
Cristallographie cristallogenèse
Metallurgy, welding
Métallurgie, soudage
Condensed state physics
Physique de l'état condensé
Sciences exactes et technologie
Exact sciences and technology
Physique
Physics
Etat condense: structure, proprietes mecaniques et thermiques
Condensed matter: structure, mechanical and thermal properties
Surfaces et interfaces; couches minces et trichites (structure et propriétés non électroniques)
Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties)
Structure et morphologie de couches minces
Thin film structure and morphology
Structure et morphologie; épaisseur
Structure and morphology; thickness
Domaines interdisciplinaires: science des materiaux; rheologie
Cross-disciplinary physics: materials science; rheology
Science des matériaux
Materials science
Méthodes de dépôt de films et de revêtements; croissance de films et épitaxie
Methods of deposition of films and coatings; film growth and epitaxy
Théorie et modèles de la croissance de films
Theory and models of film growth
Sciences appliquees
Applied sciences
Electronique
Electronics
Appareillage électronique et fabrication. Composants passifs, circuits imprimés, connectique
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Alcool
Alcohols
Alumine
Alumina
Boehmite
Boehmita
Capacité électrique
Capacitance
Condensateur
Capacitors
Couche barrière
Barrier layer
Couche mince
Thin films
Cristallisation
Crystallization
Diffraction RX
XRD
Ethane-«1,2»-diol
Ethylene glycol
Mesure capacité électrique
Capacitance measurement
Morphologie surface
Surface morphology
Mécanisme croissance
Growth mechanism
Mecanismo crecimiento
Propriété diélectrique
Dielectric properties
Traitement surface
Surface treatments
6855A
6855J
8115A
8432T
Al2O3
Substrat Aluminium
Anodic alumina
Dielectric
Surface treatment - Format:
- Academic Journal
- Database:
- PASCAL Archive
- Journal:
- Thin solid films
- Volume:
- 550
- Page Start:
- 128
- Page Count:
- 7
- ISSN:
- 00406090
- Publisher:
- Amsterdam: Elsevier, 2014.
- Document Type:
- Article
- Physical Description:
- print, 16 ref
