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Updated: Sep 23, 2025
Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
Published on: March 27, 2018
Composition-induced phase evolution and high strain response in Ba(Zn1/3Nb2/3)O3-modified (Bi0.5Na0.5)TiO3-based
Qiumei Wei1, Mankang Zhu1, Tianhe Qin1
1College of Materials Science and Engineering, Beijing University of Technology Beijing 100124 China zhumk@bjut.edu.cn +86 10 67392733.
Abstract:
In this work, a paraelectric complex perovskite Ba(Zn1/3Nb2/3)O3 (BZN) was introduced into the morphotropic boundary composition (Bi0.5Na0.5)0.93Ba0.07TiO3 (BNBT) to modulate the phase structure and electrical properties as well as the field-induced strain behavior. Using a columbite route, the ceramics with pure perovskite structure were successfully fabricated. The structure and electrical measurements showed that the introduction of BZN into BNBT results in the decrease of the rhombohedrality 90-γ, and promotes the evolution from ferroelectric to antiferroelectric (AFE) relaxor. Besides, the introduction of BZN induces the volume increase and dimension reduction of the nanosized AFE relaxor domains. A large field-induced strain of 0.39% with good stability against frequency, field, and temperature was obtained at the BNZ addition of composition x = 0.01, which locates at the critical composition boundary between ferroelectric state and AFE relaxor state.
