Nb2O5およびTa2O5の塩素化における2, 3の性質
1965 年 81 巻 923 号 p. 308-312
詳細
1965 年 81 巻 923 号 p. 308-312
Samples used in this experiment were Nb2O5, Ta2O5 and (Nb·Ta) 2O5 that were precipitated from aquous solution and calcined at different temperature.
For examining these samples in presence of carbon, the method fo continuous weigting in flowing chlorine was used, at continuously elevating temperature or constant temperature.
Experimental results obtained are as follows;
(1) On chlorination of Nb2O5 and Ta2O5, the higher the treating temperature of their oxides is, the higher the starting temperature of reaction becomes. In general, it seems to correspond considerably to their polymorphism.
(2) In the experimental range of Nb2O5-Ta2O5 system, the starting temperature of reaction is elevated continuously from Nb2O5 side to Ta2O5 side according to its composition.
(3) The rate of chlorination of the oxides may depend considerably on the temperature at which the oxides are prepared.
Apparent activation energy of chlorination in the, range of this experiment is described.
