Title :
Structure and electrical properties of (La,Ta)-doped (K0.5Na0.5)0.94Li0.06Nb0.95Ta0.05O3 ceramic
Author :
Liu, Yang ; Chu, Ruiqing ; Xu, Zhijun ; Chen, Qian ; Li, Guarong
Author_Institution :
Coll. of Mater. Sci. & Eng., Liaocheng Univ., Liaocheng, China
Abstract :
Piezoceramics (K0.5Na0.5)0.94-3xLi0.06LaxNb0.95Ta0.05O3 (KNLNT-Lax) were synthesized by the conventional solid-state reaction process. The effects of (La,Ta)-doping on the phase structure and electrical properties of (KNLNT-Lax) ceramics were investigated. X-ray diffraction analysis showed that the crystal structure of the ceramics with high level of La-doping possessed pseudo-cubic phase and the pseudo-cubic phase structure of the ceramics seriously weakened the dielectric, ferroelectric and piezoelectric properties of the ceramics. In addition, it was found that the ceramics with (La,Ta)-doping displayed a relative lower loss tangent (tand) from room temperature to approximately 350°C.
Keywords :
X-ray diffraction; crystal structure; dielectric losses; doping; ferroelectric ceramics; ferroelectricity; lanthanum compounds; lithium compounds; permittivity; piezoceramics; piezoelectricity; potassium compounds; sintering; sodium compounds; tantalum compounds; (K0.5Na0.5)0.94-3xLi0.06LaxNb0.95Ta0.05O3; LaTa-doped ceramic; X-ray diffraction; conventional solid-state reaction process; crystal structure; dielectric constant; dielectric properties; electrical properties; ferroelectric properties; phase structure; piezoceramics; piezoelectric properties; pseudocubic phase; relative lower loss tangent; sintering; structural properties; Earth; Educational institutions; Lead; Propulsion; Electrical properties; KNN; Phase structure;
Conference_Titel :
Applications of Ferroelectrics (ISAF/PFM), 2011 International Symposium on and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials
Conference_Location :
Vancouver, BC
Print_ISBN :
978-1-4577-1162-6
Electronic_ISBN :
978-1-4577-1161-9
DOI :
10.1109/ISAF.2011.6014003
