Preparation and properties of ceramics prepared from Bi4Ti3O12 amorphous material

We attempted to prepare a low-temperature-fired Bi4Ti3O12 ceramics from an amorphous substance as a basic material and Bi2O3 as a liquid phase material. When Bi2O3 was added in the amount of 10% by weight to the basic material, and then the mixture was fired under the conditions of 870 °C-5 h, ceramic samples having a relative density of about 90% were prepared. The grain sizes of the sample were 2 μm or less, that is, about one-tenth that of a sample fired under standard conditions. The electric properties of the samples were also examined. Results showed that the electrostatic capacitance change (ΔC/C) of the sample caused by the DC bias was relatively low. The DC dielectric breakdown strength was 1.4 times higher, and the remanent polarization was about one-third, as compared with a sample fired under standard conditions.