Synthesis of Sub-Micron BaTiO_(3) Ceramics by Atmosphere Controlled Calcination of BaCO_(3) and TiO_(2)

摘要

A dynamic vacuum calcination method was employed to investigate the effect of atmosphere on the solid-state reactions between rutile TiO_(2) and BaCO_(3) powders to prepare sub-micron BaTiO_(3) particles. The kinetic behavior of the calcination reaction was found to be sensitive to the pressure, nature and composition of the prevailing atmosphere and, in particular, to the availability and ease of removal of CO_(2). The results give evidence of differences in reaction pathways by varying the total reaction pressure.