- Tytuł:
- Nanoparticles of Ni on Al$\text{}_{2}$O$\text{}_{3}$ Ceramic Powder Coated by Chemical Reactions
- Autorzy:
-
Michalski, J.
Konopka, K.
Trzaska, M. - Powiązania:
- https://bibliotekanauki.pl/articles/2035468.pdf
- Data publikacji:
- 2002-08
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
73.63.Bd
81.07.Wx
81.16.-c
61.46.+w - Opis:
- Ceramic-metal composites are usually prepared by sintering ceramic with metal or metal oxide powders. An alternative technique is sintering ceramic powders coated by metal film. In the present study, the Ni coated Al$\text{}_{2}$O$\text{}_{3}$ powder was obtained by chemical reduction reaction. We used the phosphate bath for deposition of nickel-phosphorus on the surface of Al$\text{}_{2}$O$\text{}_{3}$ powder. The thickness and chemistry of Ni-P coating depend on the time and the parameters of the reaction process. Particles of Ni-P precipitate from a solution in two different forms: (a) spherical nanoparticles of Ni-P (50 nm) which grow on the surface of Al$\text{}_{2}$O$\text{}_{3}$ powder and can form tight, one diameter thick film; (b) large agglomerates of loosely connected spherical nanoparticles with a 50÷150 nm diameter. The method proposed in this study allows obtaining Al$\text{}_{2}$O$\text{}_{3}$ powder covered with Ni-P nanoparticles in the forms of thin film or single nanoparticles, mixed with loose Ni-P agglomerates.
- Źródło:
-
Acta Physica Polonica A; 2002, 102, 2; 181-186
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł