Fabrication of CuAl0.9Fe0.1O2 ceramics via a reaction–sintering process was investigated.
Without any calcination involved, the mixture of raw materials was pressed and sintered
directly. Single phase CuAl0.9Fe0.1O2 ceramics were obtained. The shrinkage is < 3% at
1150°C and increases to 8.6–11.2% at 1200–1300°C. A density 4.73 g/cm3 was obtained
for pellets sintered at 1200°C for 4 h. Grains of ~30 μmcould be seen in pellets sintered
at 1150°C and increases to ~50 μm in pellets sintered at 1300°C for 2 h. The
reaction–sintering process has proven a simple and effective method in preparing
CuAl0.9Fe0.1O2 ceramics for thermoelectric application.