Hydrothermal synthesis of potassium niobate powders

Potassium niobate (KNbO 3) powders with the orthorhombic structure were successfully synthesized through the hydrothermal reaction of Nb 2O 5 and KOH at 200 °C. The concentration of KOH had a great effect on the morphology and particle size of KNbO 3 powders. The morphology of KNbO 3 powders changed...

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Bibliographic Details
Published in:Ceramics international 2007-12, Vol.33 (8), p.1611-1615
Main Authors: Wang, Ying, Yi, Zhiguo, Li, Yongxiang, Yang, Qunbao, Wang, Dong
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Crystal growth
Electrotechnical and electronic ceramics
Exact sciences and technology
Hydrothermal synthesis
Morphology
Potassium niobate
Technical ceramics
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Summary:Potassium niobate (KNbO 3) powders with the orthorhombic structure were successfully synthesized through the hydrothermal reaction of Nb 2O 5 and KOH at 200 °C. The concentration of KOH had a great effect on the morphology and particle size of KNbO 3 powders. The morphology of KNbO 3 powders changed from rod-like to cubic particles when the potassium hydroxide (KOH) concentrations was in the range of 6.25–15 M. Particularly, when the KOH concentration was 7.5 M and the amount of Nb 2O 5 was 0.02 mol, dodecahedral crystalline was found in the precipitations.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2006.07.013