Preparation of 110 Grain Oriented Barium Titanate Ceramics by Templated Grain Growth Method and Their Piezoelectric Properties

摘要

[110]-oriented barium titanate (BaTiO3) ceramics were prepared by templated grain growth (TGG) method. The degree of orientation along the [110] direction, F110, was measured using an X-ray diffraction (XRD) pattern by the Lotgering method. To obtain both a high density and a high F110, the preparation conditions were optimized. As for the results, BaTiO3-grain-oriented ceramics with a high density of more than 96 % were successfully prepared despite various F110 values from 0 to 98 %. These grain-oriented BaTiO3 ceramics were poled at 100 掳C, and their piezoelectric properties were measured for d31 and d33 piezoelectric constants. As for the results, the d31 values were almost constant at -50 pC/N despite various F110 values, while the d33 values increased with increasing F110 values, and at around an F110 of 85 %, d33 reached a maximum of 800 pC/N