Tungsten-containing material and direct current discharge lamp electrode
A tungsten-containing material that has an oxygen generation quantity of more than 1 ppm and 20 ppm or less at 2100° C. to 2300° C. as detected by oxygen analysis based on an oxygen separation method, and contains 5 ppm or more and 30 ppm or less of potassium.
1 . A tungsten-containing material that has an oxygen generation quantity of more than 1 ppm and 20 ppm or less at 2100° C. to 2300° C. as detected by oxygen analysis based on an oxygen separation method, and contains 5 ppm or more and 30 ppm or less of potassium.
2 . The tungsten-containing material according to claim 1 , having a crystal grain size of 200 μm or less.
3 . The tungsten-containing material according to claim 1 , having a density of 19.1 g/cm 3 or more.
4 . The tungsten-containing material according to claim 1 , wherein the tungsten-containing material is used in a discharge lamp electrode.
5 . A direct current discharge lamp electrode in which the tungsten-containing material according to claim 4 is used.