Thermal Plasma Processing of Functional Ceramic Materials
Fe- and Eu-doped TiO2 nanocrystals were synthesized via Ar/O2 thermal plasma oxidation of liquid precursor mists. The use of mists ensures atomic level mixing of the elements and high supersaturation of the evaporated species upon plasma oxidation, which favors nanocrystal formation upon condensation. Iron-doped TiO2 nanopowders with controlled iron to titanium atomic ratios (RFe/Ti) ranging from 0 to 20%, were synthesized by oxidative pyrolysis of liquid-feed metallorganic precursors containing titanium tetra-n-butoxide (TTBO) and ferrocene. Europium doped TiO2 luminescent nanocrystals were also synthesized via RF thermal plasma oxidation of liquid precursor mists containing TTBO and europium nitrate.
T. Ishigaki et al., "Thermal Plasma Processing of Functional Ceramic Materials", Advances in Science and Technology, Vol. 45, pp. 281-284, 2006