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A New Phase Boundary of Oxygen Octahedral Tilt-Untilt Transition in Bi 0.5Na 0.5TiO 3-PbTiO 3 Piezoelectric Ceramics

28 Pages Posted: 15 Aug 2019 First Look: Under Review

See all articles by Kang Yan

Kang Yan

Nanjing University of Aeronautics and Astronautics - State Key Laboratory of Mechanics and Control of Mechanical Structures; National Institute for Materials Science - Ferroic Physics Group

Shuai Ren

Xi'an Jiaotong University (XJTU) - Multi-Disciplinary Materials Research Center; National Institute for Materials Science - Ferroic Physics Group

Fangfang Wang

Nanjing University of Science and Technology - School of Energy and Power Engineering

Dawei Wu

Nanjing University of Aeronautics and Astronautics - State Key Laboratory of Mechanics and Control of Mechanical Structures

Kongjun Zhu

Nanjing University of Aeronautics and Astronautics - State Key Laboratory of Mechanics and Control of Mechanical Structures

Xiaobing Ren

Xi'an Jiaotong University (XJTU) - State Key Laboratory for Mechanical Behavior of Materials; National Institute for Materials Science - Ferroic Physics Group

Abstract

The investigation on the fine structure evolutions around morphotropic phase boundary (MPB) is important to understand the origin of high piezoelectricity in ferroelectric ceramics. Here, we discovered a new boundary associated with oxygen octahedron tilt-untilt phase transition by exploring the average and local structure evolutions in the vicinity of the MPB in (Bi0.5Na0.5)TiO3-PbTiO3 (BNT-PT) ceramics. It is found that the local structure transition due to oxygen octahedron rotation is decoupled with the phase transition from rhombohedral to tetragonal phase at MPB in the BNT-PT. Such a local tilt-untilt transition is responsible to the large high-field-induced electrostrain at MPB of the BNT-PT. The crucial difference in MPB between the BNT-PT and the classical piezoelectric Pb(Zr1-xTix)O3 is discussed by linking the structure evolutions to the performance at the MPBs. This work helps us to figure out the origin of the unique large high-field-induced electrostrain in BNT-based ceramics, and may be helpful to the design of high-performance piezoelectric ceramics in the future.

Keywords: Piezoelectric ceramics, Phase transition, Morphotropic phase boundary (MPB), Oxygen octahedron

Suggested Citation

Yan, Kang and Ren, Shuai and Wang, Fangfang and Wu, Dawei and Zhu, Kongjun and Ren, Xiaobing, A New Phase Boundary of Oxygen Octahedral Tilt-Untilt Transition in Bi 0.5Na 0.5TiO 3-PbTiO 3 Piezoelectric Ceramics. Available at SSRN: https://ssrn.com/abstract=3436417

Kang Yan (Contact Author)

Nanjing University of Aeronautics and Astronautics - State Key Laboratory of Mechanics and Control of Mechanical Structures ( email )

China

National Institute for Materials Science - Ferroic Physics Group ( email )

Tsukuba, Ibaraki 305-0047
Jordan

Shuai Ren

Xi'an Jiaotong University (XJTU) - Multi-Disciplinary Materials Research Center

China

National Institute for Materials Science - Ferroic Physics Group

Tsukuba, Ibaraki 305-0047
Jordan

Fangfang Wang

Nanjing University of Science and Technology - School of Energy and Power Engineering

China

Dawei Wu

Nanjing University of Aeronautics and Astronautics - State Key Laboratory of Mechanics and Control of Mechanical Structures

China

Kongjun Zhu

Nanjing University of Aeronautics and Astronautics - State Key Laboratory of Mechanics and Control of Mechanical Structures

China

Xiaobing Ren

Xi'an Jiaotong University (XJTU) - State Key Laboratory for Mechanical Behavior of Materials

26 Xianning W Rd.
Xi'an Jiao Tong University
Xi'an, Shaanxi 710049
China

National Institute for Materials Science - Ferroic Physics Group

Tsukuba, Ibaraki 305-0047
Jordan

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