| 摘要 |
A molten glass treatment apparatus comprising a member which is composed of platinum or a platinum alloy and has an inner surface that is in contact with a molten glass, a glass layer which covers at least a part of an outer surface of the member, and a heat-resistant fiber material into which at least the outside of the glass layer is permeated, wherein the heat-resistant fiber material comprises glass fibers or ceramic fibers and has an SiO2 content of 50 mass% or more in terms of oxide content, a glass that constitutes the glass layer has a viscosity of 102.5 dPa·s or more at a use temperature, and the glass layer contains an air gap that is not communicated with the outside air. |
