Effect of K1.94Zn1.06Ta5.19O15 Addition on the Sintering Behaviors and Piezoelectric Properties of (K0.5Na0.5) NbO3 Ceramics

Author

Ryu, Jungho ; Choi, Jong-Jin ; Hahn, Byung-Dong ; Park, Dong-Soo ; Yoon, Woon-Ha

Author_Institution

Korea Inst. of Machinery & Mater., Changwon

fYear

2007

fDate

27-31 May 2007

Firstpage

682

Lastpage

685

Abstract

The effect of K_1.94Zn_1.06Ta_5.19O₁₅ addition on the sintering behavior and piezoelectric properties in lead-free, piezoelectric ceramics of (K_0.5Na_0.5)NbO₃ was investigated. The apparent density of sintered KNN ceramics was increased with KZT addition, and a relative density of above 96.5% was obtained with the doping of over 0.5 mol% KZT. The maximum dielectric and piezoelectric properties of epsiv_T ³/epsiv₀ = 590, d₃₃ = 126 pC/N, k_p = 0.42, and P_r = 18 muC/cm³ were obtained from 0.5 mol% KZT-doped KNN ceramics. A small amount of KZT (~0.5 mol%) was effective for improving the sintering behavior and piezoelectric properties, but KZT addition exceeding 1.0 mol% was only effective for densification.

Keywords

densification; doping; grain boundaries; piezoceramics; piezoelectricity; potassium compounds; sintering; sodium compounds; zinc compounds; K_0.5Na_0.5NbO₃:K_1.94Zn_1.06Ta_5.19O₁₅; KNN ceramics; KZT addition; densification; dielectric properties; doping; grain boundaries; lead-free ceramics; liquid phase sintering; microstructure; piezoelectric properties; Ball milling; Ceramics; Dielectric loss measurement; Dielectric measurements; Environmentally friendly manufacturing techniques; Lead compounds; Piezoelectric devices; Piezoelectric materials; Powders; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on

Conference_Location

Nara

ISSN

1099-4734

Print_ISBN

978-1-4244-1334-8

Electronic_ISBN

1099-4734

Type

conf

DOI

10.1109/ISAF.2007.4393369

Filename

4393369