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Semiconductor Physics, Quantum Electronics & Optoelectronics. 2011. V. 14, N 1. P. 109-113.
Study of nanoporous in humidity-sensitive MgAl2O4 ceramics
with positron annihilation lifetime spectroscopy
Scientific Research Company “Carat”, 202, Stryjska str., 79031 Lviv, Ukraine
Lviv Polytechnic National University, 12, Bandera str., 79013 Lviv, Ukraine
Phone: 8-0322-638303 ; e-mail: klymha@yahoo.com, scigroup@novas.com.ua
Abstract.
It has been shown that positron annihilation lifetime spectroscopy is a quite
promising tool for nanostructural characterization of humidity-sensitive spinel-type
MgAl 2 O 4 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 MgAl 2 O 4 ceramics if using the lifetime values of the third and fourth
components.
Keywords: nanopore, humidity-sensitive ceramics, sensor, spectroscopy.
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