Effect of the sintering temperature on the properties of 0.96(K0.5Na0.5)(Nb0.96Sb0.04)-0.04LiTaO3 ceramics

Author

Zhang, B. ; Xiao, D.Q. ; Wu, W.J. ; Li, J. ; Huang, X.L. ; Pei, Y. ; Wu, L. ; Zhu, J.G. ; He, Z.J.

Author_Institution

Dept. of Mater. Sci., Sichuan Univ., Chengdu, China

fYear

2009

fDate

23-27 Aug. 2009

Firstpage

1

Lastpage

4

Abstract

Lead-free piezoelectric ceramics 0.96(K_0.5Na_0.5)(Nb_0.96Sb_0.04)-0.04LiTaO₃ (96KNNS-4LT) have been prepared by using the conventional technique. The effect of the sintering temperature on the piezoelectric properties of 96KNNS-4LT ceramics was studied. The X-ray diffraction (XRD) and scanning electron microscope (SEM) show that all the ceramics possess a pure perovskite phase and dense microstructure. The ceramics sintered at 1090degC show better piezoelectric properties: d₃₃=315.5 pC/N, k_p=0.455, and T_C=348degC, the optimized sintering temperature range is very narrow for KNN-based ceramics, and the optimized sintering temperature range in which the d₃₃ and k_p are in the range of 0.9 times the maximum one is less than 20degC. From the results obtained it was pointed out that the sintering temperature is a very critical factor for the K_0.5Na_0.5NbO₃-based lead-free piezoelectric ceramics.

Keywords

X-ray diffraction; lithium compounds; niobium compounds; piezoceramics; potassium compounds; scanning electron microscopy; sintering; sodium compounds; (K_0.5Na_0.5)(Nb_0.96Sb_0.04)-LiTaO₃; 96KNNS-4LT ceramics; SEM; X-ray diffraction; XRD; critical factor; lead-free piezoelectric ceramics; material preparation; microstructure; scanning electron microscope; sintering temperature; temperature 1090 C; Decision support systems; Temperature; Virtual reality; Ferroelectric properties; K0.5Na0.5NbO3; Lead-free piezoelectric ceramics; Piezoelectric properties;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 2009. ISAF 2009. 18th IEEE International Symposium on the

Conference_Location

Xian

ISSN

1099-4734

Print_ISBN

978-1-4244-4970-5

Electronic_ISBN

1099-4734

Type

conf

DOI

10.1109/ISAF.2009.5307593

Filename

5307593