Low frequency internal friction study on the ferroelectric perovskite Na0.5Bi0.5TiO3 | Zendy

WenQian Wang | Zendy; X. Y. Li | Zendy; T. Liu | Zendy; Gangling Hao | Zendy

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Low frequency internal friction study on the ferroelectric perovskite Na0.5Bi0.5TiO3

Author(s) -

WenQian Wang,

X. Y. Li,

T. Liu,

Gangling Hao

Publication year - 2015

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4934586

Subject(s) - materials science , ferroelectricity , phase transition , tetragonal crystal system , ceramic , piezoelectricity , phase (matter) , perovskite (structure) , diffusion , ferroelectric ceramics , condensed matter physics , dielectric , analytical chemistry (journal) , composite material , thermodynamics , crystallography , chemistry , optoelectronics , physics , organic chemistry , chromatography

Lead-free piezoelectric ceramic Na0.5Bi0.5TiO3 was investigated by the internal friction method. The internal friction of the Na0.5Bi0.5TiO3 ceramic at low frequency (0.5 ∼ 4Hz) was measured in the temperature range from room temperature to 900 K. Three prominent internal friction peaks were observed. The P1 peak is composed of three internal friction peaks. The lower temperature peaks (P1L1 and (P1L2) may be caused by the stress-induced motion of domain walls pinned by the oxygen vacancies and the oxygen ion diffusion in Na0.5Bi0.5TiO3 sample, respectively. The higher temperature peak (P1H) may be related with the phase transition between the ferroelectric and anti-ferroelectric phase. The broader P2 peak shows that the phase transition between rhombohedral and tetragonal phase is a gradually changing process. The asymmetry of the P3 peak includes the two subpeaks (P3L and P3H peak). The two subpeaks are caused by the light Na ions diffusion by vacancies in NBT sample and the phase transition between the tetrahedral phase and the cubic phase, respectively. These results are helpful to understand the phase transition process and improve the ferroelectric and piezoelectric performance of Na0.5Bi0.5TiO3-based materials

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