| abstract |
This invention is a manufacturing method of a silica container which has rotationally symmetry and has a silica as a main component, and has a gas containing bubbles in at least an outer peripheral part and an inner layer made of transparent silica glass formed on the inner surface of the gas. At least, as a raw material powder for forming the inner layer, the particle size is 10 to 1000 μm, containing Ca, Sr, and Ba at a total concentration of 50 to 5000 wt. Ppm, and the hydrogen molecules when heated to 1000 ° C. under vacuum. A silica container having a discharge amount of 3 × 10 16 to 3 × 10 19 molecules / g is prepared, and a silica container which is a raw material powder for forming an inner layer is formed. Accordingly, a silica container and a method for producing the silica container having a high dimensional accuracy and a thick transparent silica glass layer having substantially no bubbles in the inner wall and having high durability even at a high temperature at low cost, and a method of manufacturing the silica container Silica powder for producing the same and a method for producing the same are provided. |