The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
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Microstructural Evolution during High-Temperature Deformation of Coarse-Grained BaTiO3

  • Park, Eun-Tae (Energy Technology Division, Argonne National Laboratory, Argonne, IL)
  • Published : 1999.06.01
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Abstract

Compressive creep of dense polycrystalline $BaTiO_3$, with average grain sizes of 19.3-52.4$\mu\textrm{m}$, has been investigated at 1100-$1300^{\circ}C$ in air or under controlled atmospheres $(10^2-10^5Pa \;O_2)$. Some cavity growth occurred during deformation because of non-steady-state damage accumulation in the form of cavitation. Comparison of the creep data of polycrystalline BaTiO3 with existing diffusivity and creep data for perovskite oxides suggested that deformation of polycrystalline $BaTiO_3$ was controlled by the extrinsic lattice diffusion of barium or titanium.

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