Work

Crystal-oriented (Bi0.5, Na0.5)0.85–Ba0.15TiO3 ceramics prepared by colloidal processing in rotating high magnetic field

Year: 2015

Type: article

Abstract: Crystal-oriented (Bi 0.5 , Na 0.5 ) 0.85 Ba 0.15 TiO 3 (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 BaTiO 3 leads to anisotropic crystal lattices, allowing crystal-oriented BNBT15 ceramics to be successfully fabricated, using a rotating magnetic field to orient the cand 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 aand 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.

Source: Journal of the Ceramic Society of Japan

DOI: 10.2109/jcersj2.123.340

Authors: Satoshi TANAKA, Keisuke SANO, Mitsuru IMAI, Keizo UEMATSU, Tomohiro HARADA, Yutaka DOSHIDA

Institutions: Nagaoka University of Technology, Taiyo Yuden (Japan)

Language: English

Topic: Ferroelectric and Piezoelectric Materials

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: diamond

Funder: Japan Society for the Promotion of Science

Award: Understanding and control of the powder processing and the thermodynamic driving force of sintering through the 3D-visualization of particle packing structures