| 摘要 |
A spherical annular seal member 34 includes a spherical annular base member 32 defined by a cylindrical inner surface 28, a partially convex spherical surface 29, and annular end faces 30, 31, as well as an outer layer 33 formed integrally on the partially convex spherical surface 29. The spherical annular base member 32 includes a reinforcing member 5 made from a metal wire net 4 and a heat-resistant material 6 containing expanded graphite and a phosphate and integrated with the reinforcing member 5 in mixed form, and the outer layer includes the heat-resistant material 6 containing the expanded graphite and the phosphate and the reinforcing member 5 made from the metal wire net 4 integrated with the heat-resistant material 6 in mixed form, the expanded graphite in the heat-resistant material 6 having an ash content of not more than 0.1% by mass and a graphite content of not less than 99.7% by mass. |
