Abstract: 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.

Abstract: 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.

Abstract: A displacement measuring method and apparatus can measure positions and displacements of measurement objects with high precision without regard to surface roughness. Optical beams emitted from a light source are converged through an objective lens, are incident on a surface of the measurement object, are reflected off the surface of the measurement object, and are received by an optical detector. In measurement of the surface of the measurement object, optical-intensity curves are defined while the objective lens is being shifted in the optical-axis direction. According to optical-intensity curves thus defined, a threshold Pth is defined, a center of gravity of a graph region surrounded by the optical-intensity curve is defined, and the focal point of the objective lens, when positioned at the center of gravity, is determined to be the position of a surface of the measurement object.