Title :
Dielectric and Piezoelectric Properties of NaNbO3 - BaTiO3 - SrTiO3 Ceramics
Author_Institution :
Nat. Inst. of Adv. Ind. Sci. & Technol., Nagoya
Abstract :
NaNbO3 -based piezoelectric ceramics NaNbO3 - BaTiO3 - SrTiO3 have been synthesized by conventional solid state sintering method, and their dielectric and piezoelectric properties have been studied. The dielectric, piezoelectric, and electromechanical properties of 0.88NaNbO3 - 0.11BaTiO3 -0.01SrTiO3 ceramics were found to be the cubic-tetragonal phase transition temperature (Tc)= 220degC, the orthorhombic-tetragonal phase transition temperature (Tot)= -60degC, dielectric constant epsivs=917, piezoelectric coefficient d33=118 pC/N, and electromechanical coupling factor kp=0.27. The ceramics is a good candidate material for lead-free piezoelectric ceramic actuator application.
Keywords :
barium compounds; ferroelectric transitions; permittivity; piezoceramics; piezoelectricity; sintering; sodium compounds; strontium compounds; NaNbO3-BaTiO3-SrTiO3; conventional solid state sintering method; dielectric constant; dielectric properties; electromechanical properties; lead-free piezoelectric ceramic actuator; orthorhombic-tetragonal phase transition temperature; piezoelectric ceramics; piezoelectric coefficient; piezoelectric properties; Ceramics; Dielectric constant; Dielectric materials; Dielectric measurements; Environmentally friendly manufacturing techniques; Lead; Niobium compounds; Piezoelectric materials; Powders; Temperature;
Conference_Titel :
Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on
Conference_Location :
Nara
Print_ISBN :
978-1-4244-1334-8
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2007.4393370
