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Dual relaxation behaviors and large electrostrictive properties of Bi.sub.0.5Na.sub.0.5TiO.sub.3-Sr.sub.0.85Bi.sub.0.1TiO.sub.3 ceramics

Journal of materials science, 2018-06, Vol.53 (12), p.8844 [Peer Reviewed Journal]

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Title:
Dual relaxation behaviors and large electrostrictive properties of Bi.sub.0.5Na.sub.0.5TiO.sub.3-Sr.sub.0.85Bi.sub.0.1TiO.sub.3 ceramics
Author: Wang, Jun ; Zhou, Changrong ; Li, Qingning ; Zeng, Weidong ; Xu, Jiwen ; Chen, Guohua ; Yuan, Changlai
Subjects: Ceramics
Is Part Of: Journal of materials science, 2018-06, Vol.53 (12), p.8844
Description: Lead-free ceramics (1 - x)Bi.sub.0.5Na.sub.0.5TiO.sub.3-xSr.sub.0.85Bi.sub.0.1TiO.sub.3 (BNT-xSBT, x = 0.4, 0.5, 0.6 and 0.7) were prepared by a solid-state reaction process. Coexistence of ferroelectric relaxation at low temperature and Maxwell-Wagner dielectric relaxation at high temperature was revealed for the first time in this system. Meanwhile, hysteresis-free P-E loops combined with a very high piezoelectric strain coefficient (d.sub.33) of 1658 pC/N concurrently with large electrostrictive coefficient Q = 0.287 m.sup.4C.sup.-2 were achieved. The ferroelectric relaxor behavior and large electrostrictive strain might be linked to easy reorientation and reversal of ergodic PNRs and the combined effect of Bi off-center position and lone pair electrons.
Publisher: Springer
Language: English
Identifier: ISSN: 0022-2461
EISSN: 1573-4803
DOI: 10.1007/s10853-018-2186-7
Source: ProQuest Central

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