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▲ [15p-P16-9] Investigation of optimum preparation condition for (Bi0.5Na0.5)TiO3-hexagonal BaTiO3 using electrophoretic deposition (EPD) Method
Keywords:BNT-BT ceramic, Electrophoretic Deposition (EPD)
(Bi0.5Na0.5)TiO3–BaTiO3 (BNT-BT) ceramics are well-known candidate for lead-free piezoelectric materials, because of their high Curie temperature. Among them, it is reported that Curie temperature of 85BNT-15BT composition is more than 200 oC without depolarization temperature (Td).
To obtain good properties of piezoelectric ceramics, we have studied to prepare fine-grained and [111]-textured ceramics. To achieve fine-grained and [111] textured ceramics, we investigated high magnetic field-electrophoretic deposition (HM-EPD) method which uses magnetic alignment to make textured ceramics as shown fig. 1. To enhance magnetic alignment, we use hexagonal BaTiO3 in BNT-BT system because of its high crystal anisotropy (c/a ~ 2.44).
In this work, we tried to find optimum preparation condition of 85BNT-15BT ceramics using EPD method with hexagonal BT powders, investigating various conditions for the ball milling, the suspensions, centrifugation and the deposition time. After that, we evaluated various properties of the prepared ceramics.
To obtain good properties of piezoelectric ceramics, we have studied to prepare fine-grained and [111]-textured ceramics. To achieve fine-grained and [111] textured ceramics, we investigated high magnetic field-electrophoretic deposition (HM-EPD) method which uses magnetic alignment to make textured ceramics as shown fig. 1. To enhance magnetic alignment, we use hexagonal BaTiO3 in BNT-BT system because of its high crystal anisotropy (c/a ~ 2.44).
In this work, we tried to find optimum preparation condition of 85BNT-15BT ceramics using EPD method with hexagonal BT powders, investigating various conditions for the ball milling, the suspensions, centrifugation and the deposition time. After that, we evaluated various properties of the prepared ceramics.