Cathodoluminescence of aluminum ceramic compounds

We compare in this study the differences in cathodoluminescence spectra of aluminum-based materials. AlN and Al2O3 materials respond differently when subjected to 10 keV charging electron beam. In order to understand the underlying physics, we carried out a parametric study (annealing treatment, temperature, radiation dose, and supplier). Tests have been performed at temperatures ranging from about 150 K to 300 K, with a monoenergetic electron beam at 10 keV, and electron flux density equal to 1 μA cm−2. Cathodoluminescence intensity is shown to be highly dependent on temperature, synthesis conditions, thermal annealing treatments, dose, and dose rate. The air-annealing treatment at high temperature increases considerably the concentration of surface defects. We have also been able to demonstrate a significant evolution of cathodoluminescence spectra with the injected radiation dose. These different evolutions have been analyzed in regard to material structure and composition.We compare in this study the differences in cathodoluminescence spectra of aluminum-based materials. AlN and Al2O3 materials respond differently when subjected to 10 keV charging electron beam. In order to understand the underlying physics, we carried out a parametric study (annealing treatment, temperature, radiation dose, and supplier). Tests have been performed at temperatures ranging from about 150 K to 300 K, with a monoenergetic electron beam at 10 keV, and electron flux density equal to 1 μA cm−2. Cathodoluminescence intensity is shown to be highly dependent on temperature, synthesis conditions, thermal annealing treatments, dose, and dose rate. The air-annealing treatment at high temperature increases considerably the concentration of surface defects. We have also been able to demonstrate a significant evolution of cathodoluminescence spectra with the injected radiation dose. These different evolutions have been analyzed in regard to material structure and composition.