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2018 | 133 | 4 | 864-868
Article title

Water-Sorption Effects near Grain Boundaries in Modified MgO-Al₂O₃ Ceramics Tested with Positron-Positronium Trapping Algorithm

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Abstracts
EN
Water-sorption processes near grain boundaries in the MgO-Al₂O₃ ceramics prepared at different temperatures were studied using positron annihilation lifetime spectroscopy. Numerical values of three- and four-component treatment of spectra were used for study of physical- and chemical-sorption processes in the MgO-Al₂O₃ ceramics. To apply mathematical approach in the form of positron-positronium trapping algorithm into three-component treatment of positron annihilation lifetime spectra it was shown that physical-adsorbed water did not modify positron trapping sites near grain boundaries in water-immersed MgO-Al₂O₃ ceramics and localized mainly in nanopores. The chemically-adsorbed water modifies structural extended defects located near grain boundaries that accompanied them by void fragmentation at water desorption.
Keywords
EN
Contributors
author
  • Lviv Polytechnic National University, 12 Bandery Str., Lviv, 79013, Ukraine
author
  • Opole University of Technology, Ozimska 75, 45-370 Opole, Poland
author
  • Vlokh Institute of Physical Optics, 23 Dragomanova Str., Lviv, 79005, Ukraine
  • Jan Dlugosz University of Czestochowa, al. Armii Krajowej 13/15, 42-201 Czestochowa, Poland
  • Scientific Research Company "Carat", 202 Stryjska Str., Lviv, 79031, Ukraine
author
  • Drohobych Ivan Franko State Pedagogical University, 24 I. Franko Str., Drohobych, 82100, Ukraine
author
  • Lviv State University of Life Safety, 35 Kleparivska Str., Lviv, 79000, Ukraine
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv133n4p24kz
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