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Reduction of SiO 2 by Molten Al
Author(s) -
PRABRIPUTALOONG K.,
PIGGOTT M. R.
Publication year - 1973
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1973.tb12451.x
Subject(s) - oxide , activation energy , atmospheric pressure , reaction rate , materials science , work (physics) , chemical reaction , mineralogy , metallurgy , chemical engineering , chemistry , inorganic chemistry , catalysis , thermodynamics , physics , organic chemistry , meteorology , engineering
The bulk reaction of Al and SiO 2 was reexamined in light of results of thin‐film work. When the bulk reaction was conducted under vacuum in such a way that the oxide film on the Al was almost completely absent, the reaction started immediately and proceeded at a rate more rapid than that observed by previous workers, who conducted the experiment in air at atmospheric pressure. Results obtained at 700° to 820°C indicate that the activation energy for the reaction is 42±5 kcal/mol when oxide films are absent from the surface of the molten Al.