| 摘要 |
A surge absorber in which an oxide layer excellent in chemical stability in the high temperature range and excellent in adhesion to main discharge electrodes is deposited on the main discharge electrodes. The surge absorber comprises a cylindrical ceramic body (4) on which conductive films (3) separated by a discharge gap (2) are formed, a pair of main discharge electrode members (5) opposedly disposed at both ends of the cylindrical ceramic body (4) and in contact with the conductive films (3), and a tubular ceramic body (7) in which the paired main discharge electrode members (5) are opposed, the cylindrical ceramic body (4) is contained, and a filling gas (6) is sealed. Each of the paired main discharge electrode members (5) has a projecting support (9). The opposed surfaces of the projecting supports (9) serve as main discharge surfaces (9A). Oxide films (9B) are formed on the main discharge surfaces (9A) by oxidation. |
