Modified lead-free potassium sodium niobate (KNN) and their properties

Author

Alkoy, Ebru Mensur ; Yavuz, Ayse Berksoy ; Alkoy, S.

Author_Institution

Fac. of Eng. & Natural Sci., Maltepe Univ., Istanbul, Turkey

fYear

2012

fDate

7-10 Oct. 2012

Firstpage

1

Lastpage

4

Abstract

In this study, effects of lithium and tantalum modification on the structural and dielectric properties of potassium sodium niobate (KNN) ceramics were investigated. All ceramics were fabricated by pressureless sintering technique. Li, Li-Ta modifications were improved densification and thus dielectric properties. The dielectric properties of Li and Ta modified KNN ceramics were analyzed using AC impedance spectroscopy as a function of frequency from 100 Hz to 10 MHz in temperature range from 673 K to 798 K.

Keywords

ceramics; densification; high-frequency effects; lithium compounds; permittivity; potassium compounds; sintering; sodium compounds; (K_0.50-xNa_0.50-xLi_x)Nb_1-yTa_yO₃; (K_0.50-xNa_0.50-xLi_x)NbO₃; AC impedance spectroscopy; densification; dielectric properties; frequency 100 Hz to 10 MHz; frequency function; modified lead-free potassium sodium niobate ceramics; pressureless sintering technique; structural properties; temperature 673 K to 798 K; Ceramics; Dielectrics; Impedance; Lead; Powders; Spectroscopy; Temperature measurement; Li and Li-Ta modified KNN; dielectric properties; impedance spectroscopy; lead-free;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium (IUS), 2012 IEEE International

Conference_Location

Dresden

ISSN

1948-5719

Print_ISBN

978-1-4673-4561-3

Type

conf

DOI

10.1109/ULTSYM.2012.0555

Filename

6562413