Fabrication and Characterization of Alkoxy-Derived (Na, K)NbO3 Series Powder

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Various KNbO3 powders have been derived from sol-gel process by using different preparation and heating conditions. KNbO3 powder derived from ethanol solution and fabricated at 800oC was most suitable as the raw material of KNbO3 bulk ceramics, because of the small grain size of about 250 nm and its homogeneous size distribution.

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Periodical:

Edited by:

K. Katayama, K. Kato, T. Takenaka, M. Takata and K. Shinozaki

Pages:

43-46

Citation:

K. Tanaka et al., "Fabrication and Characterization of Alkoxy-Derived (Na, K)NbO3 Series Powder", Key Engineering Materials, Vol. 350, pp. 43-46, 2007

Online since:

October 2007

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[7] K. Tanaka, K. Kakimoto and H. Ohsato: J. Eur. Ceram. Soc., accepted. e-mail: kiyo-tanaka@nitech. ac. jp Fax: 052-735-7734 Intensity (arb. units) 20 40 30 2theta (deg) 50 60 • 2-methoxyethanol • in O2(0. 5 L/min) reflux 80oC reflux 120oC ◇ :KNbO3(32-0822) ◆ :K4Nb6O17(76-0977) Fig. 5 Reflux temperature dependence on the XRD patterns for KNbO3 powders heat-treated at 800oC. Fig. 6 Reflux temperature dependence on the SEM images for KNbO3 powder fabricated from 2-methoxyethanol. The heat-treatment temperature and atmosphere were at 800oC and in O2 (0. 5 L/min), respectively. (b) reflux at 80oC (a) reflux at 120oC.

DOI: https://doi.org/10.2478/v10039-008-0053-5