Application of the Master Sintering Curve Theory to Non-Isothermal Sintering of BaTiO_3 Ceramics

摘要

In this paper a practical approach to the analysis of sintering of BaTiO_3 using the Master Sintering Curve concept has been presented. Non-isothermal sintering of high-purity non-doped BaTiO_3 ceramics was monitored using a sensitive dilatometer at three different heating rates (10, 20 and 30 ℃/min) up to 1380℃. Densification of BaTiO_3 during sintering was analyzed using the Master Curve Sintering Theory. A MSC was defined characterizing the sintering behavior of barium-titanate regardless of the heating rate. Construction of the MSC enabled estimation of the process activation energy. Using defined MSC, densification behavior of BaTiO_3 ceramics during sintering can be predicted for arbitrary temperature-time excursions and these predictions can be used in controlling and planning the sintering process of this material.