Phase transitions and the piezoelectricity around morphotropic phase boundary in Ba(Zr{sub 0.2}Ti{sub 0.8})O{sub 3}-x(Ba{sub 0.7}Ca{sub 0.3})TiO{sub 3} lead-free solid solution

Journal Article · Mon Oct 20 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4899125· OSTI ID:22350971

Zhang, Le; Zhang, Ming; Wang, Liang; Zhou, Chao; Zhang, Zhen; Yao, Yonggang ^[1]; Zhang, Lixue; Xue, Dezhen; Lou, Xiaojie ^[1]; Ren, Xiaobing ^[1]

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1. Multidisciplinary Material Research Center, Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an 710054 (China)

In this paper, two displacive phase transitions around the morphotropic phase boundary (MPB) in Ba(Zr{sub 0.2}Ti{sub 0.8})O{sub 3}-x(Ba{sub 0.7}Ca{sub 0.3})TiO{sub 3} (BZT-xBCT) ceramics were detected by inspecting two anomalies of the Raman Ti{sup 4+}-O{sup 2−} longitudinal optical mode (∼725 cm{sup −1}). Further, permittivity and X-ray diffraction results demonstrated these two phase transitions originate from tetragonal (T) to rhombohedral (R) through an intermediate orthorhombic (O) phase. Importantly, we found that the maximum piezoelectric response (d{sub 33} = 545pC/N) was achieved at the boundary between the T and O phase, indicating that the giant piezoelectricity of BZT-xBCT may mainly stem from the T-O phase boundary due to easier polarization rotation and larger lattice softening.

• OSTI ID: 22350971
• Journal Information: Applied Physics Letters, Vol. 105, Issue 16; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM COMPOUNDS
CALCIUM COMPOUNDS
CERAMICS
ORTHORHOMBIC LATTICES
OXYGEN COMPOUNDS
PERMITTIVITY
PHASE TRANSFORMATIONS
PIEZOELECTRICITY
POLARIZATION
ROTATION
SOLID SOLUTIONS
TITANATES
TITANIUM COMPOUNDS
TITANIUM IONS
TITANIUM OXIDES
TRIGONAL LATTICES
X-RAY DIFFRACTION
ZIRCONIUM COMPOUNDS