Sintering densification driven by orientation fluctuation in textured BaTiO 3 ceramics with abnormal comprehensive ferroelectric properties
Year: 2025
Type: article
Abstract: A new sintering densification method without the aid of liquid-phase is proposed for preparing the [001]c-textured BaTiO3 ceramics with high ferroelectric performances. With the help of phase-field modeling, the size and concentration of templates is optimized to control the densification process. Compared with randomly oriented BaTiO3 ceramics, the prepared textured BaTiO3 ceramics with designed templates verify the improvement in crystallographic preferred orientation and densification by the orientation fluctuation of nucleation and growth that breaks the limitation of symmetry-constrain strains. Such a new densification mechanism is comprehensively revealed by the active energies of sintering curves and the electron backscattered diffraction analysis, where an obvious anisotropic shrinkage boosting the densification manifests a different driving force from that of the normal liquid-phase sintering method. The resulting highly textured BaTiO3 ceramics exhibit abnormal comprehensive ferroelectric properties, achieving a high piezoelectric constant d33 of 490 ± 11 pC·N-1 that exceeds BaTiO3 single crystals while having small remanent polarization (8.5 mC·cm-2 at 15 kV·cm-1). Thus, the current method is expected to provide a new strategy for preparing textured ferroelectric ceramics with high performance.
Source: Journal of Advanced Ceramics
Institution: Harbin Institute of Technology
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,372
OpenAlex ID: W4411763580