Enhanced torsional actuation and stress coupling in Mn-modified 0.93(Na 0.5 Bi 0.5 TiO 3 )-0.07BaTiO 3 lead-free piezoceramic system
Source abstract
Abstract
This paper is concerned with the development of a piezoelectric d15 shear-induced torsion actuator made of a lead-free piezoceramic material exhibiting giant piezoelectric shear stress coefficient (e15) and piezoelectric transverse shear actuation force comparable to that of lead-based shear-mode piezoceramics. The Mn-modified 0.93(Na0.5Bi0.5TiO3)-0.07BaTiO3 (NBT-BT-Mn) composition exhibited excellent properties as a torsional transducer with piezoelectric shear stress coefficient on the order of 11.6 C m–2. The torsional transducer, consisting of two oppositely polarized NBT-BT-Mn d15 mode piezoceramic shear patches, provided a rate of twist of 0.08 mm m–1 V–1 under quasi-static 150 V drive. The high value of piezoelectric shear d15 coefficient in NBT-BT-Mn sample further demonstrated its potential in practical applications. These results confirm that the lead-free piezoceramics can be as effective as their lead-based counterparts.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Aeroelasticity and Vibration Control · Piezoelectric Actuators and Control
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
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Funding
Air Force Office of Scientific Research · Austrian Science Fund · Office of Naval Research Global
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