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

被引：4
作者：
Klym, H. [1 ]
Hadzaman, I [2 ]
Kostiv, Yu [1 ]
Yatsyshyn, S. [1 ]
Stadnyk, B. [1 ]
机构：
[1] Lviv Polytech Natl Univ, 12 Bandera Str, UA-79013 Lvov, Ukraine
[2] Ivan Franko Drohobych State Pedag Univ, 24 I Franko Str, UA-82100 Drogobych, Ukraine
来源：
APPLIED NANOSCIENCE | 2022年 / 12卷 / 04期
关键词：
Ceramics; Monolithization; Free-volume; Nanopores; Positron-trapping; Positronium decay; ELECTRICAL-PROPERTIES; TRANSFORMATION; SCATTERING; CATALYSTS; ETHANOL; CU;
D O I：
10.1007/s13204-021-01963-9
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The defects/nanopores conversion in the Cu0.1Ni0.8Co0.2Mn1.9O4 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 Cu0.1Ni0.8Co0.2Mn1.9O4 ceramics. Monolithization of ceramics is accompanied by agglomeration of nanopores with radius centered near 0.3 nm.
引用
收藏
页码：1347 / 1354
页数：8
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