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Title: Multiple contributions to electrostrain in high performance PbTiO3–Bi(Ni1/2Hf1/2)O3 piezoceramics triggered by phase transformation

Journal Article · · Journal of the European Ceramic Society
 [1];  [1];  [1]; ORCiD logo [1];  [2];  [1];  [1]
  1. Univ. of Science and Technology Beijing (China)
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
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Piezoelectric materials, which mechanically respond to electrical stimulation and vice versa, typically exhibit high piezoelectricity at a morphotropic phase boundary (MPB). A thorough structural description is essential for understanding the origin of excellent piezoelectric properties. In this work, a comparative study of electric-field-driven structure and phase evolution has been conducted on MPB and non-MPB tetragonal composition in high performance system of PbTiO3-Bi(Ni1/2Hf1/2)O3 piezoceramics using in situ high-energy synchrotron X-ray diffraction. The results show that the MPB composition exhibits electric-field-driven reversible tetragonal-to-monoclinic transformation, whereas non-MPB composition does not. Direct evidence shows that the extensive phase transformation triggers multiple contributions to enhancing piezoelectric performance. Namely, it not only enables the unit cell parameters of coexisting phases easily change with an external electric field, but also enhances the domain switching and lattice strain. These results offer a unique perspective on MPB associated piezoelectricity enhancement, and will be helpful for developing high performance piezoelectric materials.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
National Natural Science Foundation of China (NSFC); Fundamental Research Funds for the Central Universities; China Scholarship Council (CSC); USDOE Office of Science (SC)
Grant/Contract Number:
AC02-06CH11357; 21825102; 21731001; 21590793; FRF-TP-18-001C2
OSTI ID:
1619282
Journal Information:
Journal of the European Ceramic Society, Vol. 39, Issue 16; ISSN 0955-2219
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

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Related Subjects

36 MATERIALS SCIENCE
Electroceramics
External electric field
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Piezoelectricity
Structure–property relationship