Tungsten electrode material
AssigneeA.L.M.T. Corp.
InventorsSeiji NAKABAYASHI, Tomohiro TAKIDA
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Abstract
A tungsten electrode material contains a tungsten-based material and oxide particles dispersed in the tungsten-based material. The oxide particles are composed of an oxide solid solution in which a Zr oxide and/or an Hf oxide and an oxide of at least one rare earth selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu are dissolved as a solid solution. A content of the rare-earth oxide with respect to a total amount of the Zr oxide and/or the Hf oxide and the rare-earth oxide is not lower than 66 mol % and not higher than 97 mol %, a content of the oxide solid solution is not lower than 0.5 mass % and not higher than 9 mass %, and the remainder is composed substantially of tungsten.
Claims5
A tungsten electrode material comprising:
- a tungsten-based material;
- and
- oxide particles dispersed in the tungsten-based material,
- the oxide particles being composed of an oxide solid solution in which a Zr oxide and/or an Hf oxide and an oxide of at least one rare earth selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu are dissolved as a solid solution,
- a content of the oxide of the rare-earth with respect to a total amount of the Zr oxide and/or the Hf oxide and the oxide of the rare earth being not lower than 66 mol % and not higher than 97 mol %, a content of the oxide solid solution being not lower than 0.5 mass % and not higher than 9 mass %, and a remainder being composed substantially of tungsten.
Dependencies are inferred from the claim text.