Abstract
K2Ti6O13 whisker was synthesized by the calcination and slow-cooling method, and the microstructural evolution of whiskers, and the relations between the phase and the layer structure, were investigated. The amount of K2O in the starting powder mixture played a key role in forming a layer structure, which can be obtained by addition of excess K2O. During calcination, rod-like K2Ti6O13 particles with a layer structure were formed by reactions between K2O and TiO2. During slow-cooling, the K2O-rich liquid phase reacted with K2Ti6O13 layers near the boundary and k2Ti4O9 whiskers were produced by the splitting of layers within rod-like k2T6O13 particles. k2Ti4O9 whiskers were reformed into k2T6O13 whiskers by treatment in boiling water and reheating. The synthesized k2T6O13 whiskers had a clean surface and a length exceeding 100 μm.
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Lee, J.K., Lee, K.H. & Kim, H. Microstructural evolution of potassium titanate whiskers during the synthesis by the calcination and slow-cooling method. J Mater Sci 31, 5493–5498 (1996). https://doi.org/10.1007/BF01159322
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DOI: https://doi.org/10.1007/BF01159322