Abstract
The state of the art and trends in the production and application of barrier materials intended for preventing the infiltration of corrosive components (sodium, sodium fluoride, and molten aluminum) into the heat-insulating layer of refractories for the base plate of aluminum electrolysis cells are discussed. Results for different types of barrier materials tested for cryolitic stability are given; the granular composition and pore structure of some of them are studied. Strengths and weaknesses of the barrier materials are discussed.
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