Abstract: Ca3Co4O9 ceramics were fabricated from powders prepared by the sol-gel and chemical co-precipitation methods. The phase and morphology of the sample were investigated by XRD and SEM. The conductivity of Ca3Co4O9 ceramics was investigated with four-probe conductivity measurement. The results showed that the Ca3Co4O9 ceramics obtained from powders by the chemical co-precipitation method had lower porosity and shrinkage and higher conductivity compared with that obtained by the sol-gel method.