Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
ISSN-L : 1348-6535
Feature: Cutting edge research on electroceramics 2014: Papers
Crystal-oriented (Bi0.5, Na0.5)0.85–Ba0.15TiO3 ceramics prepared by colloidal processing in rotating high magnetic field
Satoshi TANAKAKeisuke SANOMitsuru IMAIKeizo UEMATSUTomohiro HARADAYutaka DOSHIDA
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2015 年 123 巻 1437 号 p. 340-344

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Crystal-oriented (Bi0.5, Na0.5)0.85–Ba0.15TiO3 (BNBT15) ceramics with a perovskite crystal structure were prepared by colloidal processing in a rotating high magnetic field to improve their piezoelectric properties. The presence of BaTiO3 leads to anisotropic crystal lattices, allowing crystal-oriented BNBT15 ceramics to be successfully fabricated, using a rotating magnetic field to orient the c- and a-axes of the crystal in the powder compact. The phase transformation that occurred during sintering redistributed the c-axis oriented structure along both the a- and c-axes. Again, the c-axis was enhanced by electrical field polarization. A piezoelectric constant of 122 pC/N was obtained, which is larger than the 88 pC/N of BNBT ceramics.

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© 2015 The Ceramic Society of Japan
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