Aqueous Co‐precipitated Ti0.5Sn0.5O2 Nanopowders as Precursors for Dense Spinodally
Spinodal decomposition in the TiO2–SnO2 system produces TiO2 rich/SnO2
rich nano‐wide lamellae. The high density of coherent interfaces is expected to reduce thermal conductivity of the ceramic without blocking electron transport. These semiconductors could therefore be candidates for environmental friendly oxide thermo‐electrics. However, dense
materials are difficult to obtain by conventional sintering from a mixture of TiO2 and SnO2 powders due to evaporation of tin oxide. The article presents a novel route to produce, by aqueous
co‐precipitation, Ti0.5Sn0.5O2 nanopowders as precursors for dense ceramics. The nanostructure developed by spinodal decomposition
inside the grains of the as obtained dense Ti0.5Sn0.5O2 ceramic is shown to be comparable to that of porous Ti0.5Sn0.5O2
ceramic obtained by conventional method.