Experimental Analysis of Compression Deformation at High-Temperatures and Numerical Simulation for BaTiO<sub>3</sub> Sintered Compacts

Uni-axial compression tests were performed to derive yield stress equation, flow rules and coefficient of flow stress of BaTiO3 sintered compaction. These basic equations and their physical properties were introduced into the FEM. The drooping behavior of the thin-thickness specimen during the sintering was simulated and compared to the experimental drooping, where the specimens were composed of large or small average diameter BaTiO3, respectively. Resulting simulation drooping quantitatively reproduces that experiment. This result suggests that experimentally derived yield stress equation, non-Newtonian viscoplastic flow rule 𝜎eq = 𝐹𝜀0𝜀̇0.8 and coefficient of flow stress about several to 1000 GPa s of sintered BaTiO3 compaction were numerically validated.