| 摘要 |
PURPOSE:To prevent uneven distribution of temp. in the inside of a dryer and to produce glass free from bulk cracking due to wind by separating bulk obtained by gelation from the atmosphere in the chamber of the dryer and forcedly convecting the outside atmosphere. CONSTITUTION:Bulk is obtained by using at least metallic oxide, metallic alkoxide and an acid catalyst and allowing the mixture to gel by a sol-gel process. The obtained bulk is separated from the atmosphere in the inside of a dryer in some degree and introduced into the dryer and dried while forcedly convecting the outside atmosphere. |
