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Preparation of (K,Na)NbO3 Powders with Wide Grain Size Distribution

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Abstract:

This study is aimed at obtaining (K,Na)NbO3 powders with wide grain size distribution methods. (K,Na)NbO3 powders were successfully synthesized by different ways, including hydrothermal method, sol-gel method, and molten-salt method. The experiment results showed that the hydrothermal and sol-gel methods could not control the grain size of the (K,Na)NbO3 powders effectively . The grain size of (K,Na)NbO3 powders can be only tailored by the molten-salt method through controlling the starting oxide powder morphology, as well as crystallization temperature. The grain size was not affected by the experimental parameters whether or not the initial powders were milled. Furthermore, it has been found that the crystallization temperature could change the grain size of the powders monotonously. The (K,Na)NbO3 powders synthesized by molten salt method distributed from nanoscale to micron level, which can lay the foundation for further research on the grain size effect of (K,Na)NbO3 lead free piezoelectric ceramics.

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Periodical:

Materials Science Forum (Volume 898)

Pages:

1603-1610

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.898.1603

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Online since:

June 2017

Authors:

Yu Hua Zhen, Kai Li Jia, Lin Ling Li*, Yu Xi Qiao, Fu Hua Sun, Min Zhang

Keywords:

(K,Na)NbO3 Powders, Crystallization Temperature, Wide Grain Size Distribution

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© 2017 Trans Tech Publications Ltd. All Rights Reserved

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