- Tytuł:
- Preparation and Characterization of Fe/$SiO_{2}$ Powder Composites Using Impregnation Method
- Autorzy:
-
Kabátová, M.
Füzer, J.
Füzerová, J.
Dudrová, E.
Kollár, P. - Powiązania:
- https://bibliotekanauki.pl/articles/1367476.pdf
- Data publikacji:
- 2014-07
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
81.20.Ev
77.84.Lf
75.60.Ej - Opis:
- Fe/$SiO_{2}$ powder composite materials based on irregularly and/or spherically shaped iron powder particles with an addition of $SiO_{2}$ nanopowder were prepared in two ways, (i) by mixing the Fe/$SiO_{2}$ powder with 1.0 wt.% of Shellac dissolved in ethanol and (ii) by vacuum/pressure impregnation of low-temperature sintered Fe/$SiO_{2}$ components with shellac dissolved in ethanol and with thermoplast SL450. $SiO_{2}$ was implemented either as nanopowder or by sol-gel coating. Vacuum/pressure impregnation (VPI) of pre-sintered samples was performed in a steel container. The influence of iron particle shape and processing conditions on the electro-insulating layer was microscopically evaluated and correlated with the values of the electrical resistivity and coercivity. It has been found that the continuity, distribution and thickness of insulating phase is strongly controlled by the shape of iron particles. Using the VPI procedure, the irregular surface of iron particles may cause discontinuities of insulating layer, while the spherical iron particles are well covered with continuous evenly distributed insulating layer.
- Źródło:
-
Acta Physica Polonica A; 2014, 126, 1; 134-135
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł