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Breaking the strain–symmetry trade-off via electrostriction-mediated reversible phase transition in B-site-engineered BNKT based ceramics

ผศ.ดร.พิชิตชัย บุตรน้อย | ไม่มี

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Breaking the strain–symmetry trade-off via electrostriction-mediated reversible phase transition in B-site-engineered BNKT based ceramics

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Collection	RMUTK Research Repository (RMUTK IR) วารสารวิชาการ — e-Journal Articles
ID RMUTK Digital	RMUTK000043
Title	Breaking the strain–symmetry trade-off via electrostriction-mediated reversible phase transition in B-site-engineered BNKT based ceramics
Alternative title	Breaking the strain–symmetry trade-off via electrostriction-mediated reversible phase transition in B-site-engineered BNKT based ceramics
Authors	ผศ.ดร.พิชิตชัย บุตรน้อย ผู้แต่งหลัก ผศ.ดร.ศุภลักษณ์ มะโนธรรม ศ.ดร.กอบวุฒิ รุจิจนากุล (มหาวิทยาลัยเชียงใหม่) Corresponding
Faculty	คณะครุศาสตร์อุตสาหกรรม
Journal Title	Journal of Advanced Ceramics
ISSN	2226-4108
Volume / Issue / Pages	Vol.15 \| No.8 \| pp.9221335
Published	2026-06-18
Year	2569
Level	ระดับนานาชาติ (SCOPUS)
Quartile	Q1
DOI	https://www.sciopen.com/article/10.26599/JAC.2026.9221335
Funding Source	วช.
Abstract	ไม่มี
Abstract (EN)	Achieving large electrostrain together with a symmetric bipolar response remains challenging in lead-free piezoceramics, as mechanisms that generate large strain often involve irreversible polarization processes that limit strain reversibility. Here, B-site Zr engineering in Bi0.495La0.005Na0.400K0.100Ti1−xZrxO3 (x = 0.000–0.025) enables a large electrostrain (~0.52%) together with a nearly symmetric bipolar strain–electric field (S–E) response. The optimized composition (x = 0.015) exhibits a large normalized strain coefficient (d*33 ≈ 867 pm/V), while x = 0.025 shows an enhanced electrostrictive coefficient (~0.055 m4/C2), indicating strengthened electrostriction-dominated behavior. The enhanced electromechanical response originates from Zr-induced lattice softening and R3c–P4bm phase coexistence, which flatten the free-energy landscape and promote reversible field-driven polarization dynamics. The reduced remanent polarization and coercive field suppress irreversible domain-wall motion, thereby favoring electrostriction-governed strain generation. These results demonstrate that coupling lattice softening with phase coexistence provides an effective design pathway for achieving large, nearly symmetric bipolar strain through electrostriction-dominated mechanisms in lead-free piezoceramics.
Keywords (TH)	ไม่มี
Keywords (EN)	bismuth sodium potassium titanate (BNKT)giant strain large electrostrictive coefficient lead-free ceramics biomaterials bioactivity
Access Level	เฉพาะ มทร.กรุงเทพ

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