Domain Properties of High-Performance Barium Titanate Ceramics

概要

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It has been known that barium titanate (BaTiO3) causes abnormal grain growth during conventional sintering utilizing resistance heating. The grain growth of barium titanate induced using by a hydrothermal synthesis method is controlled using microwave sintering having effects on internal overheating and rapid sintering and relationships between domain size and the piezoelectric constant $d_{33}$ are studied. The domain size of a sample having a grain size of 2.5 μm was 76 nm and the $d_{33}$ was 350 pC/N; however, the domain size of a 10 μm sample was 156 nm and the $d_{33}$ was 300 pC/N. Furthermore, with the sample having a higher $d_{33}$, the continuity of the domain structure across grain boundaries was confirmed.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2007-10-30