Title :
Dielectric and piezoelectric properties of modified (Na, K)NbO3 ceramics substituted with KNbO3
Author :
Byenon, Sunmin ; Yoo, Juhyun
Author_Institution :
Dept. of Electr. Eng., Semyung Univ., Jechon, South Korea
Abstract :
In this study, (1-x)[(Li0.04(Na0.56K0.44)0.96(Nb0.90Ta0.10) 0.998Zn0.005O3)]-xKNbO3 (x = 0 ~ 7.5 mol%) composition ceramics were fabricated by a conventional sintering technique. The influences of KNbO3 on the dielectric and piezoelectric properties of the ceramics were investigated. Optimum physical properties of piezoelectric constant d33 = 255 [pC/N], electromechanical coupling factor kp = 0.4358, dielectric constant εr= 699, measured density (ρ)= 4.49 [g/cm3] were obtained from the composition ceramic with x = 3[mol%]. These results indicate that the (1-x) LNKLNTZ-xKN ceramic is a promising lead-free piezoelectric candidate material for practical applications.
Keywords :
lithium compounds; permittivity; piezoceramics; piezoelectricity; potassium compounds; sintering; sodium compounds; [(Li0.04(Na0.56K0.44)0.96(Nb0.90Ta0.10)0.998Zn0.005O3)]-KNbO3; dielectric constant; dielectric properties; electromechanical coupling factor; lead-free piezoelectric; modified ceramics; optimum physical properties; piezoelectric constant; sintering; Ceramics; Couplings; Dielectric constant; Lead; Powders; Temperature dependence; KNbO3; Lead-free ceramics; NKN; Piezoelectric;
Conference_Titel :
Applications of Ferroelectrics held jointly with 2012 European Conference on the Applications of Polar Dielectrics and 2012 International Symp Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials (ISAF/ECAPD/PFM), 2012 Intl Symp
Conference_Location :
Aveiro
Print_ISBN :
978-1-4673-2668-1
DOI :
10.1109/ISAF.2012.6297801
