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KMID : 1059519930370080765
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Journal of the Korean Chemical Society
1993 Volume.37 No. 8 p.765 ~ p.772
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Flux Melting Route to 2-and 3-dimensional Fibrous Potassium Titanates, K2Ti2nO4n＋1 (n = 2 and 3)
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Choy Jin-Ho
Han Yang-Su
Song Seung-Wan
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Abstract
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Two-dimensional potassium tetratitanate (K2Ti4O9) and three-dimensional potassium hexatitanate (K2Ti6O13) fibers have been prepared by the combined method consisting of the flux melting (1150℃)-slow cooling (cooling rate = 5℃/h) process from the starting raw materials of K2CO3, and TiO2 with the flux of K2MoO4. It was found that the fiber growth reaction is strongly dependent upon the mole ratio of flux (F) to raw material (R), which is 7 : 3 (F : R) as for the optimum growth condition. Relatively long fibers (average length ≒ 4 mm) with a mixture of K2Ti4O9 (major) and K2Ti6O13 (minor) could be obtained when the reaction was carried out for the K2MoO4-K2O·4TiO2 (F : R = 7 : 3) system, but for the K2MoO4-K2O·6TiO2 (F : R = 7: 3) one, only the short fibers with ≒ 2 mm long could be grown as the mixed phase of K2Ti6O13 and K2Ti4O9.
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