| abstract |
(57) [Abstract] (Corrected) [Problem] Maintaining mechanical strength irrespective of density changes, increasing electrical conductivity and thermal conductivity in the thickness direction, and irrespective of density changes Providing a porous carbon plate with a different temperature. The carbon fiber paper has a thickness of 4 to 9 μm and a length of 4 The thickness of the thickest carbon short fiber (D1) with respect to the thickness (D1) of the thinnest carbon short fiber, including two or more types of carbon short fibers having different thicknesses having at least carbon short fibers of mm or more A carbon fiber paper having a ratio (D2 / D1) of 2) of 1.3 or more. Includes short fibers of two or more kinds of carbon fibers having different thicknesses and having at least carbon short fibers having a thickness of 4 to 9 μm and a length of 4 mm or more, and a density ρ of 300 to 850 k The porous carbon plate is characterized in that it has a bending strength F [MPa] and a specific resistance R [Ωm] in the thickness direction, which is g / m 3 . F ≧ ρ / 27 ………… R ≦ 0.015 × ρ -1/2 ……… |