Figure 1

(a). X-ray diffraction patterns of (i) as prepared CaCu₃Ti₄O₁₂ (CCTO), (ii) CCTO pellets sintered at 1130 ^oC/2 h and (iii) ICDD data file card no. 01-075-1149 for CCTO. (b) Scanning electron micrographs of the CCTO pellets sintered at 1130 °C/2 h.