Abstract: Disclosed is a corrosion resistant member comprising a sintered material having an ?-Al2O3 crystal and an YAG (yttrium-aluminum-garnet) crystal. The corrosion resistant member contains metal elements, 70 to 98% by mass (inclusive) of Al in terms of Al2O3 and 2 to 30% by mass of Y in terms of Y2O3. The corrosion resistant member has a peak intensity ratio I116/I104 within the range from 0.94 to 1.98, preferably. 2.21 or higher, wherein I116 and I104 represent peak intensities attributed to the (116) face and the (104) face, respectively, of an ?-Al2O3 crystal as measured by X-ray diffractometry on its surface layer.

Abstract: A corrosion resistant member comprising a base material made of ceramics or a metal and at least one layer of corrosion resistant film formed on the surface of the former. At least one layer of the corrosion resistant film is a corrosion resistant film formed from a compound of the group 3 element as the main component and has specific characteristics so that it can improve film property.

Abstract: A corrosion resistant member comprising a base material made of ceramics or a metal and at least one layer of corrosion resistant film formed on the surface of the former. At least one layer of the corrosion resistant film is a corrosion resistant film formed from a compound of the group 3 element as the main component and has specific characteristics so that it can improve film property.

Abstract: Disclosed is a corrosion resistant member comprising a sintered material having an ?-Al2O3 crystal and an YAG (yttrium-aluminum-garnet) crystal. The corrosion resistant member contains metal elements, 70 to 98% by mass (inclusive) of Al in terms of Al2O3 and 2 to 30% by mass of Y in terms of Y2O3. The corrosion resistant member has a peak intensity ratio I116/I104 within the range from 0.94 to 1.98, preferably. 2.21 or higher, wherein I116 and I104 represent peak intensities attributed to the (116) face and the (104) face, respectively, of an ?-Al2O3 crystal as measured by X-ray diffractometry on its surface layer.

Abstract: A corrosion resistant member comprising a base material made of ceramics or a metal and at least one layer of corrosion resistant film formed on the surface of the former. At least one layer of the corrosion resistant film is a corrosion resistant film formed from a compound of the group 3 element as the main component and has specific characteristics so that it can improve film property.

Abstract: A corrosion resistant member comprising a base material made of ceramics or a metal and at least one layer of corrosion resistant film formed on the surface of the former. At least one layer of the corrosion resistant film is a corrosion resistant film formed from a compound of the group 3 element as the main component and has specific characteristics so that it can improve film property.

Abstract: A semiconductive ceramic contains a compound of MgO and SiO2 as a main component, and an iron oxide such as FeO, Fe2O3, and Fe3O4 as an electric conductivity provider. According to necessity, the semiconductive ceramic further contains at least one of zinc oxide, niobium oxide, and chromium oxide as an electric conductivity provider. The semiconductive ceramic has a desired electric conductivity and a mechanical strength required for structural material, thus being usable in various applications.

Abstract: A semiconductive ceramic contains a compound of MgO and SiO.sub.2 as a main component, and an iron oxide such as FeO, Fe.sub.2 O.sub.3, and Fe.sub.3 O.sub.4 as an electric conductivity provider. According to necessity, the semiconductive ceramic further contains at least one of zinc oxide, niobium oxide, and chromium oxide as an electric conductivity provider. The semiconductive ceramic has a desired electric conductivity and a mechanical strength required for structural material, thus being usable in various applications.