Nanoparticles of Ni on Al_2O_3 Ceramic Powder Coated by Chemical Reactions

• Authors: J. Michalski , K. Konopka , M. Trzaska
• Languages of publication: EN

Abstracts

EN

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_2O_3 powder was obtained by chemical reduction reaction. We used the phosphate bath for deposition of nickel-phosphorus on the surface of Al_2O_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_2O_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_2O_3 powder covered with Ni-P nanoparticles in the forms of thin film or single nanoparticles, mixed with loose Ni-P agglomerates.

Keywords

EN

73.63.Bd; 81.07.Wx; 81.16.-c; 61.46.+w

Discipline

• 81.07.Wx: Nanopowders
• 73.63.Bd: Nanocrystalline materials
• 81.16.-c: Methods of micro- and nanofabrication and processing(for femtosecond probing of semiconductor nanostructures, see 82.53.Mj in physical chemistry and chemical physics)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2002
• Volume: 102
• Issue: 2
• Pages: 181-186

Dates

published

2002-08

received

2001-09-23

Contributors

author

J. Michalski

• Warsaw University of Technology, Faculty of Materials Science and Engineering, Wołoska 141, 02-507 Warsaw, Poland

author

K. Konopka

• Warsaw University of Technology, Faculty of Materials Science and Engineering, Wołoska 141, 02-507 Warsaw, Poland

author

M. Trzaska

• Warsaw University of Technology, Faculty of Materials Science and Engineering, Wołoska 141, 02-507 Warsaw, Poland

References

• 1. M. Sternitzke, J. Eur. Ceram. Soc. 17, 1061, 1997
• 2. T. Sekino, K. Niihara, Nanostract. Mater., 6, 663, 1995
• 3. M. Nawa, T. Sekino, K. Niihara, J. Mater. Sci., 29, 3185, 1994
• 4. T. Sekino, T. Nakajima, K. Niihara, Mater. Lett., 29, 165, 1996
• 5. R.Z. Chen, W.H. Tuan, J. Eur. Ceram. Soc., 19, 463, 1999
• 6. T. Sekino, K. Niihara, J. Eur. Ceram. Soc., 18, 31, 1998

Identifiers

DOI

10.12693/APhysPolA.102.181