Nanoscale Investigation of Porous Structure in Adsorption-Desorption Cycles in the MgO-Al2O3 Ceramics

  • H. KlymEmail author
  • A. Ingram
  • R. Szatanik
  • I. Hadzaman
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 221)


Investigations of pores in nanoscale level in the humidity-sensitive MgO-Al2O3 ceramics sintered at 1400 °C for 2 hours were performed using modified positron annihilation lifetime spectroscopy method. It is shown that in the expansion of spectra into four components, it is possible to estimate the nanopore sizes and to study the processes occurring in them. It was established that the nanopores fraction with a radius of ~1.5 nm is an order of magnitude higher than the proportion of pores with a radius of ~ 0.3 nm, in which also the ortho-positronium annihilation in adsorbed water occurs.


Ceramics Positron annihilation Nanopores Modification Humidity-sensitivity 



H. Klym thanks Ministry of Education and Science of Ukraine for support. The authors thank Prof. O. Shpotyuk for discussion.


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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Lviv Polytechnic National UniversityLvivUkraine
  2. 2.Opole University of TechnologyOpolePoland
  3. 3.Drohobych State Pedagogical UniversityDrohobychUkraine

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