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Low-temperature combustion synthesis of K0.5Na0.5NbO3 powders

HAIBO YANG1,* , YING LIN1, JIANFENG ZHU1, FEN WANG1

Affiliation

  1. School of Materials Science and Technology, Shaanxi University of Science and Technology, Xi’an 710021, China

Abstract

Pure K0.5Na0.5NbO3 powder was prepared at low temperature by a combustion method using Na2CO3, K2CO3 and Nb2O5 as raw materials and urea as fuel. The crystal structure and morphology of the powder were characterized by X-ray diffraction and scanning electron microscope. The XRD patterns reveal that single-phase K0.5Na0.5NbO3 powder can be obtained at 550 oC by the method, and the SEM photographs show that the powder is fine and well-developed. The synthesis parameters (e. g., the calcination temperature, dwelling time, and (Na2CO3+ K2CO3+Nb2O5) -to- urea weight ratio) are studied to reveal the optimized synthesis conditions for preparing pure K0.5Na0.5NbO3 powders..

Keywords

Lead-free piezoelectric ceramics, (K0.5Na0.5)NbO3, Combustion, Direct synthesis.

Submitted at: Dec. 12, 2008
Accepted at: April 28, 2009

Citation

HAIBO YANG, YING LIN, JIANFENG ZHU, FEN WANG, Low-temperature combustion synthesis of K0.5Na0.5NbO3 powders, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 4, pp. 446-449 (2009)