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HomeKey Engineering MaterialsKey Engineering Materials Vol. 566Polarization Mechanism of Fine-Grained BaTiO3...

Polarization Mechanism of Fine-Grained BaTiO₃ Ceramics at High Temperature Region

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Abstract:

Pure Barium titanate (BaTiO₃) ceramics with grain sizes of 0.6, 1.5, and 18 μm on average were prepared by using a two-step sintering method. The wideband dielectric spectra in the range from kHz to THz were measured at 25 and 150 °C to understand the polarization mechanism of fine-grained BaTiO₃ ceramics. It was revealed that the dipole and ionic polarizations decreased with decreasing grain size at 25 and 150 °C when the grain size was smaller than 1 μm. These mechanisms were interpreted as a grain boundary effect.

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Periodical:

Key Engineering Materials (Volume 566)

Pages:

12-15

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.566.12

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Online since:

July 2013

Authors:

Takahiro Yamazaki, Takuya Hoshina, Hiroaki Takeda, Takaaki Tsurumi

Keywords:

Barium Titanate (BT), Dielectric Property, Size Effect, Wideband Dielectric Spectra

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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