Effect of Microwave Treatment on the Microstructure and Dielectric Properties of SnO2-doped CaCu3 Ti4O12

A microwave (MW) treatment process was performed to pre-sintered of CaCu₃Ti₄O₁₂. Conventional furnace was used for calcinationd and sintered process, whereas a domestic microwave oven employed for treatment in order to produce the better phase structures, morphology and dielectric properties of CaCu₃Ti₄O₁₂ products. Analysis SEM show that the microstructures of MW treated sample is better densification, fine and larger grain size if compare to the untreated sample. Dielectric properties also have been improved by MW treatment, which is higher dielectric constant and lower dielectric loss. The effect of doping concentration of SnO₂ to dielectric properties of CaCu₃Ti₄O₁₂ had been studied. It was found that the dielectric constant of CaCu₃Ti₄O₁₂ decreased exponentially with molarities percentage of SnO₂-The lowest dielectric loss value has been obtained at sample with 6 mol% doping concentration.