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Phase transitional behavior and electric field-induced large strain in alkali niobate-modified Bi0.5(Na0.80K0.20) 0.5TiO3 lead-free piezoceramics
Hao J.; Shen B.; Zhai J.; Chen H.
2014
Source PublicationJournal of Applied Physics
ISSN218979
Volume115Issue:3
AbstractThe effect of (KyNa1-y)NbO3 (KyNN) addition on the ferroelectric stability and consequent changes in the electrical properties of lead-free Bi0.5(Na 0.80K0.20)0.5TiO3 (BNKT20) piezoceramics were systematically studied. Results showed that the K yNN substitution into BNKT20 induces a phase transition from coexistence of ferroelectric tetragonal and rhombohedral to a relaxor pseudocubic with a significant disruption of the long-range ferroelectric order, and correspondingly adjusts the ferroelectric-relaxor transition point T F-R to room temperature. Accordingly, a large electric-field-induced strain of 0.33%-0.46% (Smax/Emax = 413-575 pm/V), which is derived from a reversible field-induced ergodic relaxor to ferroelectric phase transformation, was obtained in KyNN-modified compositions near the phase boundary. Moreover, a relationship between the position of the ferroelectric-relaxor phase boundary and the tolerance factor t of the end member KyNN was found in BNKT20-xKyNN system, which is expected to provide a guideline for searching the new ferroelectric-relaxor phase boundary where the strain response is consistently derivable in (Bi 0.5Na0.5)TiO3-based materials. © 2014 AIP Publishing LLC.
DOI10.1063/1.4862187
URLView the original
Language英语
The Source to ArticleScopus
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Cited Times [WOS]:52   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
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Hao J.,Shen B.,Zhai J.,et al. Phase transitional behavior and electric field-induced large strain in alkali niobate-modified Bi0.5(Na0.80K0.20) 0.5TiO3 lead-free piezoceramics[J]. Journal of Applied Physics,2014,115(3).
APA Hao J.,Shen B.,Zhai J.,&Chen H..(2014).Phase transitional behavior and electric field-induced large strain in alkali niobate-modified Bi0.5(Na0.80K0.20) 0.5TiO3 lead-free piezoceramics.Journal of Applied Physics,115(3).
MLA Hao J.,et al."Phase transitional behavior and electric field-induced large strain in alkali niobate-modified Bi0.5(Na0.80K0.20) 0.5TiO3 lead-free piezoceramics".Journal of Applied Physics 115.3(2014).
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