Fabrication of Textured BaTiO₃ Ceramics by Electrophoretic Deposition in A High Magnetic Field using Single-domain Particles

Abstract

BaTiO 3 (BT) ceramics were prepared by electrophoretic deposition (EPD) or slip casting (SC) in a high magnetic field (HM) of 12 T using single-domain or multi-domain BT particles. The {110}-oriented BT ceramics with a Lotgering factor of 25% were prepared by HM-EPD of the single-domain BT particles, while no texture was observed for the BT ceramics prepared by HM-SC of the single-domain BT particles and for the BT ceramics prepared using the multi-domain BT particles regardless of the preparation methods. These results were discussed with factors that reduced the magnetic anisotropy of the BT particles.

Fabrication of 〈110〉 grain-oriented 0.15BaTiO3–0.85(Bi0.5Na0.5)TiO3ceramics by a reactive templated grain growth method

“…A grain orientation technique is effective for improving piezoelectric properties in anisotropic ferroelectric materials. [1][2][3][4][5][6] For example, off-polar 〈110〉 grain-oriented barium titanate (BT; BaTiO 3 ) ceramics exhibited a larger piezoelectric constant d 33 of 788 pC=N 7) than randomly oriented ceramics with the d 33 of 191 pC=N, 8) and the increased d 33 was comparable to that of lead zirconate titanate (PZT) ceramics with a similar Curie temperature. 9) Barium titanate-bismuth sodium titanate [BT-BNT; Ba-TiO 3 -(Bi 0.5 Na 0.5 )TiO 3 ] solid solutions are among the promising lead-free piezoelectric materials.…”

Fabrication of 〈111〉-oriented BaTiO₃ ceramics by high magnetic field electrophoretic deposition using hexagonal-tetragonal co-existing BaTiO₃ powder

“…Thus, BT has gained a renewed interest due to the possibility of enhancing its piezoelectric properties on the basis of its diamagnetic nature which helps for making texture ceramics with fine grain. 13), 16) But, this Eq. (1) suggests that easy particle rotation needs large ¦», which can be achieved with a large lattice constant ratio c/a.…”

Phase evolution and <110>‐orientation mechanism in RTGG‐processed BaTiO3 ceramics with electrical properties

“…With <110> grain orientation in BaTiO 3 ceramics, the piezoelectric coefficient increased significantly (788 pC/N) 9 than that of its randomly oriented counterpart (191 pC/N) 10 . Various grain‐orientation techniques have been reported for enhancing piezoelectric properties in various ferroelectric materials, 11‐15 among which a reactive templated grain growth (RTGG) method is the widely used process in perovskite‐structured ferroelectric materials. The RTGG method has been reported to be well‐suited for fabricating grain‐oriented BaTiO 3 16 and BaTiO 3 ‐based ceramics 5,7,17‐19 …”