Annealing Induced Structural and Phase Transitions in Anodic Aluminum Oxide Prepared in Oxalic Acid Electrolyte | Sciact - CRIS-system of Boreskov Institute of Catalysis

Annealing Induced Structural and Phase Transitions in Anodic Aluminum Oxide Prepared in Oxalic Acid Electrolyte Full article

Journal

Surface and Coatings Technology
ISSN: 0257-8972 , E-ISSN: 1879-3347

Output data

Year: 2020, Volume: 381, Article number : 125159, Pages count : 10 DOI: 10.1016/j.surfcoat.2019.125159

Tags

Annealing; Anodic aluminum oxide; Kinetic analysis; Quantitative phase composition; Rietveld method; Specific surface area

Authors

Roslyakov I.V. ¹ , Kolesnik I.V. ¹ , Levin E.E. ^1,2 , Katorova N.S. ³ , Pestrikov P.P. ¹ , Kardash T.Yu. ^4,5 , Solovyov L.A. ⁶ , Napolskii K.S. ¹

Affiliations

1	Lomonosov Moscow State University, Moscow, 119991, Russia
2	FSRC “Crystallography and Photonics” RAS, Moscow, 119333, Russia
3	Skolkovo Institute of Science and Technology, Moscow, 121205, Russia
4	Boreskov Institute of Catalysis, Novosibirsk, 630090, Russia
5	Novosibirsk State University, Novosibirsk, 630090, Russia
6	Institute of Chemistry and Chemical Technology, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, 660036, Russia

Funding (3)

1	Federal Agency for Scientific Organizations	v.45.3.3.
2	Russian Foundation for Basic Research	18-29-11097 (АААА-А18-118113090085-5)
3	Ministry of Science and Higher Education of the Russian Federation	ГЗ-2017-2020

Anodic aluminum oxide (AAO) films with uniform cylindrical pores are widely used as templates and membranes. The annealing of initially amorphous AAO enhances its chemical stability, but simultaneously changes its morphology and phase composition. Here we study the effect of annealing in the temperature range up to 1150 °C on structural and phase transitions in porous AAO films prepared by Al anodization in oxalic acid. Full-profile analysis of high-resolution X-ray diffraction patterns using the Rietveld method reveals the sequence of phase transformations (amorphous alumina → a mixture of γ-Al2O3 and θ-Al2O3 → a mixture of γ-Al2O3, δ-Al2O3, and θ-Al2O3 → α-Al2O3) and is used for quantitative phase analysis. Decomposition of oxalate-impurities, induced by the AAO crystallization, is studied using combined Fourier-transform infrared spectroscopy and thermogravimetry analysis. The removal of impurities results in the formation of mesopores in the AAO cell walls with a consequence increase in the specific surface area up to 80 m2·g− 1. The apparent activation energies of the removal of water (~35 kJ·mol− 1) and of the decomposition of carbon-containing impurities (~350 kJ·mol− 1) are calculated. Morphology-dependent kinetics of the impurities removal is described in the framework of the limited mass-transport of oxalate decomposition products through the cell walls. © 2019 Elsevier B.V.

Roslyakov I.V. , Kolesnik I.V. , Levin E.E. , Katorova N.S. , Pestrikov P.P. , Kardash T.Y. , Solovyov L.A. , Napolskii K.S.
Annealing Induced Structural and Phase Transitions in Anodic Aluminum Oxide Prepared in Oxalic Acid Electrolyte
Surface and Coatings Technology. 2020. V.381. 125159 :1-10. DOI: 10.1016/j.surfcoat.2019.125159 WOS Scopus РИНЦ AN OpenAlex

Submitted:	Sep 9, 2019
Accepted:	Nov 11, 2019
Published online:	Nov 14, 2019
Published print:	Jan 15, 2020

Web of science:	WOS:000508497500017
Scopus:	2-s2.0-85075858100
Elibrary:	43207709
Chemical Abstracts:	2019:2332867
OpenAlex:	W2988335549

DB	Citing
Scopus	38
Web of science	36
Elibrary	43
OpenAlex	44