| 摘要 |
PURPOSE:To prevent a seal member from being embritted at high temperatures and prevent a sealing function from being lowered, by using vermiculite as a main constituent of a refractory material constituting the seal member. CONSTITUTION:Since the seal member 13 is so constructed that a core member 15 is not exposed at the surface of a refractory layer 14 and, unlike a conventional seal member, it is not in the form of metallic mesh envolving cavities, gases are prevented from penetrating into or through the member 13, and a high sealing performance of the member 13 is secured. The refractory layer 14 comprises vermiculite as a main constituent, and has heat resistance and expanding property at high temperatures, so that the sealing property at high temperatures is also enhanced. |
