| 摘要 |
For providing a solar reflective glass block whose solar reflection characteristic is not lowered even if it is used for an external wall of a building over a long term and which can suppress as much as possible insufficiency of the lighting or the glare caused by reflection of the solar radiation, and a producing method thereof, a solar reflective glass block (10) is constituted of a glass press-formed body of a hollow box shape having a pair of mutually confronting transparent walls, and formed with a metal oxide film (11) on an inner side of at least one of the transparent walls. In the solar reflective glass block, the metal oxide film has a solar radiation reflectance of 15 to 60 %, a solar radiation absorptance of 5 to 60 % and a solar radiation transmittance of 20 to 70 %. For producing the foregoing solar reflective glass block, a pair of glass press-formed bodies, each having a box shape with a bottom and no top are first prepared, and then a solution containing metallic compound is sprayed onto an inner side of the bottom of at least one of the glass press-formed bodies so as to form a metal oxide film having a solar radiation reflectance of 15 to 60 %, a solar radiation absorptance of 5 to 60 % and a solar radiation transmittance of 20 to 70 %. Thereafter, open edges of the glass press-formed bodies are softened by heating, and then sealed together. |
