The phase and dielectric properties of the Sol gel BaTiO3 ceramics

摘要

A sol-gel acetate process was used to synthesize BaTiO3 ceramics, using Sb as dopant. Sintering was performed in a temperature range of 1200 to 1300oC for 4 h. The XRD analysis revealed that BaTiO3 ceramics indicated tetragonal structure at these temperatures. With an increase in Sb contents, dielectric measurements of BaTiO3 ceramics exhibited a decrease in dielectric constant and a shift in the Curie temperature (Tc) towards the low temperature. At 1 and 3 wt% of Sb contents, Tc was shifted near room temperature. These results had an important role for the application of various devices operated in envelopment at normal temperature.