journal article·2018-08-27

High Energy Storage Density and Large Strain in Bi(Zn2/3Nb1/3)O3-Doped BiFeO3–BaTiO3 Ceramics

Dawei Wang, Zhongming Fan, Wenbo Li, Di Zhou, Antonio Feteira, Ge Wang, Shunsuke Murakami, Shikuan Sun, Quanliang Zhao, Xiaoli Tan, Ian M. Reaney

ACS Applied Energy Materials· Volume 1· Issue 8
Publisher page

Abstract

High recoverable energy density (Wrec ∼ 2.1 J/cm3) was obtained in (0.7 – x)BiFeO3-0.3BaTiO3-xBi(Zn2/3Nb1/3)O3 + 0.1 wt % Mn2O3 (BF-BT-xBZN, x = 0.05) lead-free ceramics at <200 kV/cm. Fast discharge speeds (<0.5 μs), low leakage (∼10–7 A/cm2), and small temperature variation in Wrec (∼25% from 23 to 150 °C) confirmed the potential for these BiFeO3-based compositions for use in high energy density capacitors. A core–shell microstructure composed of a BiFeO3-rich core and BaTiO3-rich shell was observed by scanning and transmission electron microscopy which may contribute to the high value of energy density. In addition, for x = 0.005, a large electromechanical strain was observed with Spos = 0.463% and effective d33* ∼ 424 pm/V, suggesting that this family of ceramics may also have potential for high strain actuators.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Ferroelectric and Piezoelectric Materials · Multiferroics and related materials · Dielectric materials and actuators

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, United Kingdom

Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011, United States

Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China

Christian Doppler Laboratory for Advanced Ferroic Oxides, Sheffield Hallam University, Sheffield S1 1WB, United Kingdom

School of Mechanical and Materials Engineering, North China University of Technology, Beijing 100144, China

Funding

Engineering and Physical Sciences Research Council · National Natural Science Foundation of China

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