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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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Microstructure and Electrical Properties of (1-x)Bi(Li1/3Zr2/3)O-3-xPbTiO(3) Piezoelectric Ceramics

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Title
Microstructure and Electrical Properties of (1-x)Bi(Li1/3Zr2/3)O-3-xPbTiO(3) Piezoelectric Ceramics
Author
Chen, JunWang, XiaoweiJo, WookRoedel, Juergen
Keywords
Dielectric constants; Electrical property; Ferroelectric property; Large-signals; Lattice distortions; Low loss; Morphotropic phase boundaries; Piezoelectric coefficient; Piezoelectric property; Promising materials; Small signal; Solubility limits; Temperature dependence
Issue Date
2010-06
Publisher
WILEY-BLACKWELL
Citation
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.93, no.6, pp.1692 - 1696
Abstract
A new type of BiMeO3-PbTiO3 was prepared by using Li1+ as part of the Me site cations. Several (1-x)Bi(Li,Me')O 3-xPbTiO3 compositions were prepared with Me' cations of a higher valence (Me'=Ti4+, Zr4+, Mn4+, Sn 4+, Nb5+, and Ta5+). (1-x)Bi(Li,Me')O 3-xPbTiO3 exhibits a low solubility of Bi(Li,Me')O 3 in PbTiO3. Although there are many possible compositions of (1-x)Bi(Li,Me')O3-xPbTiO3, no morphotropic phase boundary was found. After the initial screening, (1-x)Bi(Li1/3Zr 2/3)O3-xPbTiO3 was identified as the most promising material for actuator applications due to its relatively large solubility limit (x=0.7) and low lattice distortion (c/a=1.036). It was then chosen for systematical study with respect to structure, ferroelectric, and piezoelectric properties. In addition, La was further added to improve the piezoelectric properties of (1-x)Bi(Li1/3Zr2/3)O 3-xPbTiO3. The temperature dependence of 0.3Bi(Li 1/3Zr2/3)O3-0.7PbTiO3 and 0.3(Bi0.9La0.1)(Li1/3Zr2/3)O 3-0.7PbTiO3 was assessed by investigating the dielectric constant and large-signal d33. 0.3Bi(Li1/3Zr 2/3)O3-0.7PbTiO3 exhibits a dielectric constant with a low loss (0.025), ferroelectric properties (EC=5.9 kV/mm, Pr=20.8 μC/cm2, and Psat=25.9 μC/cm 2), piezoelectric coefficients (small-signal d33=78 pC/N and large-signal d33=106 pm/V), and Curie temperature (T C=290°C). La (10 mol%) substitution for Bi acts as a soft role with an enhanced d33 (98 pC/N) and reduced TC (215°C).
URI
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DOI
10.1111/j.1551-2916.2010.03625.x
ISSN
0002-7820
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MSE_Journal Papers
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