Graphite Electrodes
AssigneeGrafTech International Holdings Inc.
InventorsKevin Patrick Fenton, Aaron Tomasek, Andrew Justin Francis
Life of this patent
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Abstract
A carbon article having a first zone and a second zone wherein in the first zone formed from a first mix design and the second zone formed from a second mix design and the first and second mix designs have at least one difference selected from the group of differences of a presence of a certain material, a concentration of a certain material, the size of the a certain material and combinations thereof.
Claims15
A carbon article having a first zone and a second zone, the first zone having a concentration of carbon fibers greater than a concentration of carbon fibers in the second zone and wherein the first zone comprises at least one of an exterior portion or a terminal portion of the article.
A carbon article having a first zone and a second zone wherein in the first zone formed from a first mix design and the second zone formed from a second mix design and the first and second mix designs have at least one difference selected from the group of differences of a presence of a certain material, a concentration of a certain material, the size of a certain material and combinations thereof.
A method of making a carbon article comprising
- a. combining a first mix design and a second mix design in a segregated manner, wherein the first mix design differs from the second mix design in at least one manner;
- b. forming a green article;
- and
- c. carbonizing the green article.
Dependencies are inferred from the claim text.