Rate of change of oxygen chemical potential in liquid PbO−SiO2 binary solution
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The rate of the chemical potential change of oxygen in a liquid PbO−SiO2 binary solution, with SiO2 contents of 10, 20, and 30 mol pct, and in pure PbO, has been measured at temperatures of 900°, 950°, 1000°, 1050°, and 1100°C. The rate increased with temperature according to the Arrhenius type relation and decreased with the increase of the silica content. It is suggested that the rate-controlling step is the counter diffusion rate of Pb2+ and Pb4+ ions, which are considered to be the most easily movable ions in the PbO−SiO2 solution. The relation between the rate of oxygen chemical potential change and the electrical conductivity is also discussed for the liquid PbO−SiO2 system.
KeywordsCell Assembly Diffusion Constant Electromotive Force Metallurgical Transaction Volume Liquid Oxide Phase
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