Chemical composition and structural changes of porous templates obtained by anodising aluminium in phosphoric acid electrolyte | Zendy

Le Coz F. | Zendy; Arurault L. | Zendy; Fontorbes S. | Zendy; Vilar V. | Zendy; Datas L. | Zendy; Winterton P. | Zendy

Premium

Chemical composition and structural changes of porous templates obtained by anodising aluminium in phosphoric acid electrolyte

Author(s) -

Le Coz F.,

Arurault L.,

Fontorbes S.,

Vilar V.,

Datas L.,

Winterton P.

Publication year - 2010

Publication title -

surface and interface analysis

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.52

H-Index - 90

eISSN - 1096-9918

pISSN - 0142-2421

DOI - 10.1002/sia.3199

Subject(s) - anodizing , phosphoric acid , materials science , electrolyte , scanning electron microscope , chemical engineering , amorphous solid , raman spectroscopy , oxide , aluminium oxide , aluminium , thermogravimetric analysis , inorganic chemistry , metallurgy , chemistry , crystallography , composite material , physics , optics , electrode , engineering

Ordered anodic aluminium oxide (AAO) films were first prepared by anodising in a phosphoric acid electrolyte and then studied extensively and characterised by field emission gun‐scanning electron microscopy (FEG‐SEM), X‐ray diffraction, Raman and infrared spectroscopy at a macroscopic scale. These analyses showed that the as‐prepared AAO film is in fact amorphous, partially hydrated and that its initial global chemical composition can be described, in agreement with previous works, as: Al 2 O 3 , 0.186AlPO 4 · 0.005H 2 O. Additional analyses (thermogravimetric analysis, differential thermal analysis and FEG‐SEM) showed geometrical changes of the film structure at different scales, explained by various steps of dehydration and allotropic transformations of the resulting crystallised alumina. However, because their structure remains unchanged up to 900 °C, the phosphoric templates appear to be particularly suitable for applications or processes at medium or high temperatures, such as the preparation of carbon nanotubes or oxide rods. Copyright © 2010 John Wiley & Sons, Ltd.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here

Accelerating Research