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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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Incipient piezoelectrics and electrostriction behavior in Sn-doped Bi-1/2( Na0.82K0.18)(1/2) TiO3 lead-free ceramics

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Title
Incipient piezoelectrics and electrostriction behavior in Sn-doped Bi-1/2( Na0.82K0.18)(1/2) TiO3 lead-free ceramics
Author
Han, Hyoung-SuJo, WookKang, Jin-KyuAhn, Chang-WonKim, Ill WonAhn, Kyoung-KwanLee, Jae-Shin
Keywords
Electric-field-induced strain; Electrostrictive; Electrostrictive coefficients; Ergodic relaxor state; Lead free ceramics; Strain properties; Switching dynamics; Temperature-insensitive
Issue Date
2013-04
Publisher
AMER INST PHYSICS
Citation
JOURNAL OF APPLIED PHYSICS, v.113, no.15, pp. -
Abstract
Dielectric, ferroelectric, piezoelectric, and strain properties of lead-free Sn-doped Bi-1/2(Na0.82K0.18)(1/2)TiO3 (BNKT) were investigated. A crossover from a nonergodic relaxor to an ergodic relaxor state at room temperature, accompanied by a giant electric-field-induced strain, was observed at 5 at. % Sn doping. Switching dynamics monitored during a bipolar poling cycle manifested that the observed giant strain originates from incipient piezoelectricity. When Sn doping level reached 8 at. %, BNKT exhibited an electrostrictive behavior with a highly temperature-insensitive electrostrictive coefficient of Q(11) = 0.023 m(4)
URI
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DOI
10.1063/1.4801893
ISSN
0021-8979
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MSE_Journal Papers
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