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Molten Salt Techniques - Volume 3 (Paperback, Softcover reprint of the original 1st ed. 1987)
Loot Price: R1,485
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Molten Salt Techniques - Volume 3 (Paperback, Softcover reprint of the original 1st ed. 1987)
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The physicist Kamerlingh Onnes, who was the first to liquify helium
(1908), had written on the walls of his laboratory in Leiden: "From
measur ing to knowing." As true as this is at very low
temperatures, it is just as applicable at the high temperatures of
molten salts. Only on the basis of exact measurements by a plethora
of experimental methods can any real understanding be reached of
both classes of liquids. In both temperature ranges experimental
difficulties are much greater than those encountered around ambient
temperature. Molten salts often present a formidable challenge to
the experimen talist, for example, because of corrosion and other
materials problems. Applications of molten salts were for a long
time based on empirical knowledge alone. This was true for the
first application of molten salts in 1807, when Davy obtained
sodium and potassium by electrolysis of the molten hydroxides. For
100 years the winning of aluminum has been based on the very nearly
simultaneous invention by Hall and Heroult (1886) of the
electrolysis of molten cryolite. The process, though essentially
unchanged, has since been perfected owing to an improvement in our
understanding of what actually happens, based on difficult
measurements ofthe many variables. However, even now there are gaps
in our knowledge."
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