Title :
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
Abstract :
The effect of K1.94Zn1.06Ta5.19O15 addition on the sintering behavior and piezoelectric properties in lead-free, piezoelectric ceramics of (K0.5Na0.5)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 epsivT 3/epsiv0 = 590, d33 = 126 pC/N, kp = 0.42, and Pr = 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; K0.5Na0.5NbO3:K1.94Zn1.06Ta5.19O15; 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;
Conference_Titel :
Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on
Conference_Location :
Nara
Print_ISBN :
978-1-4244-1334-8
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2007.4393369
