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Jo, Wook
Sustainable Functional Ceramics Lab
Research Interests
  • Lead-free piezoceramics, ultra - low temperature sintering, ferroelectrics, relaxor ferroelectrics, 2D materials, magnetoelectric materials, multiferroics

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Relaxor/Ferroelectric Composites: A Solution in the Quest for Practically Viable Lead-Free Incipient Piezoceramics

Cited 8 times inthomson ciCited 4 times inthomson ci
Title
Relaxor/Ferroelectric Composites: A Solution in the Quest for Practically Viable Lead-Free Incipient Piezoceramics
Author
Groh, ClaudiaFranzbach, Daniel J.Jo, WookWebber, Kyle G.Kling, JensSchmitt, Ljubomira A.Kleebe, Hans-JoachimJeong, Soon-JongLee, Jae-ShinRoedel, Juergen
Keywords
actuators; ceramic-ceramic composites; lead-free piezoceramics; relaxor
Issue Date
2014-01
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED FUNCTIONAL MATERIALS, v.24, no.3, pp.356 - 362
Abstract
Recently developed lead-free incipient piezoceramics are promising candidates for off-resonance actuator applications with their exceptionally large electromechanical strains. Their commercialization currently faces two major challenges: high electric field required for activating the large strains and large strain hysteresis. It is demonstrated that design of a relaxor/ferroelectric composite provides a highly effective way to resolve both challenges. Experimental results in conjunction with numerical simulations provide key parameters for the development of viable incipient piezoceramics. Incipient piezoceramics are featured by giant strain of ≈0.4%. However, this giant strain is only realized at relatively large electric field (>4 KV mm-1) with a significant strain hysteresis. Here, many of the challenges the incipient piezoceramics face can be overcome by relaxor/ferroelectric composite approach.
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DOI
10.1002/adfm.201302102
ISSN
1616-301X
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MSE_Journal Papers
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