Tungsten electrode material and thermionic emission current measuring device
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United States of America Patent
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Nov 22, 2016
Grant Date -
Oct 6, 2011
app pub date -
Dec 8, 2009
filing date -
Dec 8, 2008
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Abstract
Provided is a tungsten electrode material that can improve the life of an electrode than conventional by the use of a material in place of thorium oxide. The tungsten electrode material includes a tungsten base alloy and oxide particles dispersed in the tungsten base alloy, wherein the oxide particle is an oxide solid solution in which a Zr oxide and/or a Hf oxide and an oxide of at least one or more kinds of rare earth elements selected from Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu are solid-dissolved.
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