Investigation in Optimization Process Parameter of CaCu<sub>3</sub>Mn<sub>4</sub>O<sub>12</sub> via Sol-Gel Synthesis

Due to the disadvantageous of solid state in CaCu 3 Mn 4 O 12 ceramic processing, the sol gel synthesis has been extensively studied to produce fine size of powder and better homogeneity at low processing temperature. This paper provides a summary to prove that the single phase of CaCu 3 Mn 4 O 12 ceramic with high purity and characteristic is actually can be produced via sol gel synthesis at relative low temperature under pressureless sintering process. The stoichiometric CaCu 3 Mn 4 O 12 powders were successfully prepared by the citric gel method with molar ratio of [citrates/metallic io; 1:2. The precursor gel formed was calcined and sintered at range 400 °C to 800 °C. A single-phase CaCu 3 Mn 4 O 12 fairly well densified at relative low temperature under atmospheric sintering condition. Analysis has been done under XRD and FESEM. Result shown formation of CaCu 3 Mn 4 O 12 started at 500 °C and was formed completely at 700 °C for 18h. FESEM results turned out that CaCu 3 Mn 4 O 12 powder particle is submicron in size and highly agglomerates due to high calcinations temperature. Varying in sintering parameter is actually exhibit differences in phase formation, grain size and magnetic behavior.