| 摘要 |
PROBLEM TO BE SOLVED: To provide a fire door that uses a low radiation glass that suppresses erosion into a low radiation film by a reactive gas under a high-temperature environment.SOLUTION: A fire door includes low radiation glass having a low radiation film formed on a glass substrate and a resin member containing halogen or sulphur, the low radiation film having the following layers laminated sequentially on the glass substrate: a first layer constituted by dielectric; a second layer constituted by a metal mainly composed of Ag; a third layer constituted by the dielectric; a fourth layer constituted by the metal mainly composed of Ag; and a fifth layer constituted by the dielectric. The third layer contains a mixed oxide film of Zn and Sn. The fifth layer includes two or more dielectric films, a mixed oxide film of Zn and Sn, and a TiOfilm formed on a surface of the mixed oxide film, where the TiOfilm is the furthest film on an opposite side of the glass substrate.SELECTED DRAWING: Figure 1 |
