Positron annihilation characterization of free volume in micro- and macro-modified Cu0.4Co0.4Ni0.4Mn1.8O4 ceramics


  • H. Klym Lviv Polytechnic National University, Ukraine
  • A. Ingram Physics Faculty of Opole University of Technology, Poland
  • O. Shpotyuk Vlokh Institute of Physical Optics, Lviv, Ukraine
  • I. Hadzaman Drohobych Ivan Franko State Pedagogical University, Ukraine
  • V. Solntsev V.E. Lashkaryov Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine, Kiev, Ukraine
  • O. Hotra Lublin University of Technology, Poland
  • A.I. Popov Institute of Solid State Physics, University of Latvia, Latvia



Ключові слова:

ceramics, free volume, nanopores, positron trapping, positronium decaying.


Free volume and pore size distribution size in functional micro and macro-micro-modified Cu0.4Co0.4Ni0.4Mn1.8O4 ceramics are characterized by positron annihilation lifetime spectroscopy in comparison with Hg-porosimetry and scanning electron microscopy technique. Positron annihilation results are interpreted in terms of model implication positron trapping and ortho-positronium decaying. It is shown that free volume of positron traps are the same type for macro and micro modified Cu0.4Co0.4Ni0.4Mn1.8O4 ceramics. Classic Tao-Eldrup model in spherical approximation is used to calculation of the size of nanopores smaller than 2 nm using the ortho-positronium lifetime.


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Як цитувати

Klym, H.; Ingram, A.; Shpotyuk, O.; Hadzaman, I.; Solntsev, V.; Hotra, O.; Popov, A. Positron Annihilation Characterization of Free Volume in Micro- and Macro-Modified Cu0.4Co0.4Ni0.4Mn1.8O4 Ceramics. Fiz. Nyzk. Temp. 2016, 42, 764-769.




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