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It has been shown that positron annihilation lifetime spectroscopy is a quite promising tool for nanostructural characterization of humidity-sensitive spinel-type MgAl2O4 ceramics. The results have been achieved using the four-component fitting procedure with arbitrary lifetimes that is applied to mathematically treat the measured spectra. It has been shown that the Tao-Eldrup model is adequate to calculate the nanopore size in MgAl2O4 ceramics if using the lifetime values of the third and fourth components.

Study of nanoporous in humidity-sensitive MgAl2O4 ceramics with positron annihilation lifetime spectroscopy