Enhanced torsional actuation and stress coupling in Mn-modified 0.93(Na0.5Bi0.5TiO3)-0.07BaTiO3lead-free piezoceramic system.
This paper is concerned with the development of a piezoelectricd15shear-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-Mnd15mode piezoceramic shear patches, provided a rate of twist of 0.08 mm m-1V-1under quasi-static 150 V drive. The high value of piezoelectric sheard15coefficient 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.
Bio-inspired Materials and Devices Laboratory (BMDL), Center for Energy Harvesting Materials and Systems (CEHMS), Virginia Tech , Blacksburg , VA , USA.
Pelin
P
Berik
Bio-inspired Materials and Devices Laboratory (BMDL), Center for Energy Harvesting Materials and Systems (CEHMS), Virginia Tech , Blacksburg , VA , USA.
Deepam
D
Maurya
Bio-inspired Materials and Devices Laboratory (BMDL), Center for Energy Harvesting Materials and Systems (CEHMS), Virginia Tech , Blacksburg , VA , USA.
Prashant
P
Kumar
Bio-inspired Materials and Devices Laboratory (BMDL), Center for Energy Harvesting Materials and Systems (CEHMS), Virginia Tech , Blacksburg , VA , USA.
Min Gyu
MG
Kang
Bio-inspired Materials and Devices Laboratory (BMDL), Center for Energy Harvesting Materials and Systems (CEHMS), Virginia Tech , Blacksburg , VA , USA.
Shashank
S
Priya
10 Engineering and structural materials; 107 Glass and ceramic materials; 202 Dielectrics/Piezoelectrics/Insulators; 304 Powder processing/Sintering; 400 Modeling/Simulations; Lead-free; actuation; piezoceramic; shear-mode; torsion