Optimized method for measuring of positron annihilation lifetime spectra in nanomaterials with extended porosity for sensor applications
An optimized by hardware complexity method for measuring of positron annihilation lifetime spectra was proposed and used to investigation of humidity-sensitive MgO-Al2O3 ceramics with advanced nanoporosity. Positron-positronium annihilation spectrum were analyzed using four-component fitting procedures. It is shown that this technique can be used to investigation of nanopores transformation in humidity-sensitive MgO-Al2O3 ceramics as porosimetry method. It is shown that Tao-Eldrup model can be used for study of size of nanopores smaller then 1,5 nm.