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

fYear

2012

fDate

9-13 July 2012

Firstpage

1

Lastpage

2

Abstract

In this study, (1-x)[(Li_0.04(Na_0.56K_0.44)_0.96(Nb_0.90Ta_0.10) _0.998Zn_0.005O₃)]-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 k_p = 0.4358, dielectric constant ε_r= 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; [(Li_0.04(Na_0.56K_0.44)_0.96(Nb_0.90Ta_0.10)_0.998Zn_0.005O₃)]-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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ISAF.2012.6297801

Filename

6297801