Free-volume defects/nanopores conversion of temperature-sensitive Cu0.1Ni0.8Co0.2Mn1.9O4 ceramics caused by addition phase and monolithization process.

Authors :: Klym, H.
Hadzaman, I.
Kostiv, Yu
Yatsyshyn, S.
Stadnyk, B.
Source :: Applied Nanoscience; Apr2022, Vol. 12 Issue 4, p1347-1354, 8p
Publication Year :: 2022
Abstract: The defects/nanopores conversion in the Cu<subscript>0.1</subscript>Ni<subscript>0.8</subscript>Co<subscript>0.2</subscript>Mn<subscript>1.9</subscript>O<subscript>4</subscript> ceramics caused by addition phase and monolithization process was studied by positron annihilation lifetime spectroscopy using three-component decomposition of spectra within mixed positron- and positronium-trapping modes. It is established that a larger amount of addition NiO phase in ceramics resulted in void fragmentation with future agglomeration due to monolitization processes. The NiO extracted near intergranular boundaries formed new positron-trapping sites in the Cu<subscript>0.1</subscript>Ni<subscript>0.8</subscript>Co<subscript>0.2</subscript>Mn<subscript>1.9</subscript>O<subscript>4</subscript> ceramics. Monolithization of ceramics is accompanied by agglomeration of nanopores with radius centered near 0.3 nm. [ABSTRACT FROM AUTHOR]

Full Text Access

Tools