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Ag-8CuO (wt.%) nanocomposite powders were synthesized by calcination at 600 °C of precipitates of copper and silver nitrates and ammonium carbonate. The calcination temperature was determined according to the results of simultaneous thermal analysis of the precipitates. The particle size of the powders was about 50 nm; the crystallite size and the lattice strain of the calcined powders were 34 nm and 0.04 %, respectively. The nanocomposite powders were cold pressed and solid state sintered at 900 °C for 2 and 6 h. It was shown that the sintering duration has more influence on densification of the sintered samples than the cold pressure magnitude. The sintered compacts were re-pressed under 1 GPa. The relative density, hardness and electrical conductivity of the re-pressed samples were 94 %, 65 HRF and 69 % international annealed copper standard conductivity, respectively.

Thermochemical synthesis and sintering of silver-8 wt.% copper oxide nanocomposite powders