Abstract: A tungsten sheet includes a tungsten layer. The tungsten layer includes a binder resin and a plurality of tungsten particles included in the binder resin. A tungsten composition amount of the tungsten layer is at least 70% by mass (wt %). An average particle diameter of the plurality of tungsten particles is more than 1 ?m and less than 15 ?m.

Abstract: A tungsten sheet includes a tungsten layer. The tungsten layer includes a binder resin and a plurality of tungsten particles included in the binder resin. A tungsten composition amount of the tungsten layer is at least 70% by mass (wt %). An average particle diameter of the plurality of tungsten particles is more than 1 ?m and less than 15 ?m.

Abstract: A metal fiber included in a fiber product includes a tungsten wire having a diameter less than or equal to 22 ?m. The tungsten wire may have, for example, a diameter less than or equal to 18 ?m. The tungsten wire may have, for example, a diameter within a range from 20% less than 13 ?m to 20% greater than 13 ?m. In addition, the tungsten wire may have, for example, a diameter greater than or equal to 5 ?m. Further, the tungsten wire may include, for example, pure tungsten. Moreover, the metal fiber may be, for example, a metal thread including a false-twisted yarn which is made of a chemical fiber and is wound.