Solid state synthesis and spectroscopic analysis of CuAlO2 and spinel CuAl2O4

The multitude of effected works about oxides obtained from the system Cu/Al 2 O 3 proves the increasing interest for these oxides in synthesis and technological applications, due to their physical and chemical properties. In this work, CuAlO 2 and spinel CuAl 2 O 4 were prepared by conventional tech...

Full description

Saved in:
Bibliographic Details
Published inPhase transitions Vol. 93; no. 8; pp. 813 - 825
Main Authors Moulla, F., Chekirou, W., Karaali, A., Boukheit, N., Mirouh, K.
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 02.08.2020
Taylor & Francis Ltd
Subjects
Aluminum oxide
Brazing atmospheres
Chemical properties
dendrite and nano structure
Dendritic structure
diffusion
Heat treatment
Microanalysis
Oxidation
Oxides
Raman spectroscopy
Silicon
Spinel
Online AccessGet full text

Cover

More Information
Summary:The multitude of effected works about oxides obtained from the system Cu/Al 2 O 3 proves the increasing interest for these oxides in synthesis and technological applications, due to their physical and chemical properties. In this work, CuAlO 2 and spinel CuAl 2 O 4 were prepared by conventional technique of brazing in oxidizing atmosphere starting from the Cu/Al 2 O 3 assembly. Thermal treatment was performed at 1150°C, with a sufficiently long time in order to obtain a large interaction zone. The structure of the Cu/Al 2 O 3 interface was characterized using XRD microanalysis and Raman spectroscopy. The obtained results show an interaction zone with a complex structure, where CuAlO 2 and spinel CuAl 2 O 4 coexist, at Cu/Al 2 O 3 junction, with a dendritic structure of Cu 2 O and silicon in solution. Otherwise, we showed that the presence of both the silicon inclusion and the multiple crystalline phases, mixed the ones with the others, led to the photonic modes activation not predicted by the groups theory.
ISSN:0141-1594
1029-0338
DOI:10.1080/01411594.2020.1789919