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Enhanced torsional actuation and stress coupling in Mn-modified 0.93(Na0.5Bi0.5TiO3)-0.07BaTiO3 lead-free piezoceramic system.

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.

SUBMITTER: Berik P 

PROVIDER: S-EPMC5256243 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature

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Enhanced torsional actuation and stress coupling in Mn-modified 0.93(Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub>)-0.07BaTiO<sub>3</sub> lead-free piezoceramic system.

Berik Pelin P   Maurya Deepam D   Kumar Prashant P   Kang Min Gyu MG   Priya Shashank S  

Science and technology of advanced materials 20170109 1

This paper is concerned with the development of a piezoelectric <i>d</i><sub>15</sub> shear-induced torsion actuator made of a lead-free piezoceramic material exhibiting giant piezoelectric shear stress coefficient (<i>e</i><sub>15</sub>) and piezoelectric transverse shear actuation force comparable to that of lead-based shear-mode piezoceramics. The Mn-modified 0.93(Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub>)-0.07BaTiO<sub>3</sub> (NBT-BT-Mn) composition exhibited excellent properties as a  ...[more]

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