Silica membrane and method for manufacturing the same

摘要

There is provided a silica membrane 1 formed on a porous substrate. A desorbed ionic strength of water having a temperature of 500° C. in a temperature-programmed desorption analysis of water of the silica membrane is 2,000,000/g. The silica membrane 1 is manufactured by allowing a silica sol having a water concentration of 0.03 to 3 mass % to adhere to a porous substrate by an ethanol solvent, drying the silica sol by sending air having a dew point of −70 to 0° C., and firing the dried silica sol at 200 to 400° C.

主权项

1. A silica membrane formed on a porous substrate, wherein a desorbed ionic strength of water having a temperature of 500° C. in a temperature-programmed desorption analysis of water of the silica membrane is 2,000,000/g or more, and wherein the silica membrane is manufactured by a method comprising:
allowing a silica sol having a water concentration of 0.03 to 3 mass % with an ethanol solvent to adhere to a porous substrate, drying the silica sol by blowing air having a dew point of −70 to 0° C., and firing the dried silica sol at 200 to 400° C.