A.l.m.t. Corporation

Hidenobu Nishino

Akihiko Ikegaya

Shigekazu Yamazaki

Ayuri Tsuji

Takanori Kadokura

Masahiro Katoh

Yoshitake Fukaya

Makoto Watanabe

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.

Tungsten-containing material and direct current discharge lamp electrode

The molybdenum crucible includes a cylindrical side wall and a bottom provided integrally with one end of the side wall. The side wall includes a coarse grain region configured to extend from an outer wall toward an inner wall and a fine grain region configured to extend from the inner wall toward the outer wall so as to be in contact with the coarse grain region. The ratio of the coarse grain region in the side wall in the thickness direction thereof is 10% or more and less than 90%. The coarse grain region is defined as such a region in which crystal grains having a grain size of 1 mm or more determined by an intercept method in the height direction of the crucible occupy 95% or more of an area of a measurement region.

Molybdenum crucible

A heat-resistant molybdenum alloy of this invention comprises a first phase containing Mo as a main component and a second phase comprising a Mo&#x2014;Si&#x2014;B-based intermetallic compound particle phase, wherein the balance is an inevitable impurity and wherein the Si content is 0.05 mass % or more and 0.80 mass % or less and the B content is 0.04 mass % or more and 0.60 mass % or less.

Heat-resistant molybdenum alloy

A heat-resistant member comprising a molybdenum alloy that comprises a first phase containing Mo as a main component and a second phase comprising a Mo&#x2014;Si&#x2014;B-based intermetallic compound particle phase, wherein the balance is an inevitable impurity and wherein the Si content is 0.05 mass % or more and 0.80 mass % or less and the B content is 0.04 mass % or more and 0.60 mass % or less. The member may be coated.

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Toyama, Japan

Hidenobu Nishino