Stabilizers for titanium diboride-containing cathode structures
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United States of America Patent
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Dec 9, 2008
Grant Date -
May 26, 2005
app pub date -
Nov 26, 2003
filing date -
Nov 26, 2003
priority date (Note) -
Expired
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Abstract
A method is described for making aluminum reduction cell components, e.g. cathodes having stabilized surfaces, which comprises mixing together a carbonaceous material, TiB.sub.2 and up to 25% by weight of a finely divided additive consisting of a combination of two intimately mixed compounds and forming the mixture into a cell component, wherein at least a first of the two compounds has a higher melting temperature than the baking temperature. When the cell component is contacted with molten aluminum, the aluminum reacts with the additive to form a dense phase at the surface of the cell component, having low solubility in aluminum.
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