Expansion graphite sheet of high thermal resistance, and exhaust gasket of high thermal resistance

摘要

An expansion graphite sheet of high thermal resistance includes an expansion graphite as a main component, and inorganic thermal resistance particles made of at least one selected from the group consisting of aluminum boride (AlB₂ and/or AlB₁₂), silicon boride (SiB₆), zinc boric acid (2ZnO.3B₂O₃.3.5H₂O) and phosphorous boride (PB). An exhaust gasket made of the expansion graphite sheet, in addition to the expansion graphite sheet, can exhibit high thermal (oxidization) resistance under a high temperature of 600-700° C.