| 摘要 |
<p>PURPOSE: To obtain a annealing method of a silica glass, which is capable of producing a high homogeneous silica glass lump small in strain in high yield. CONSTITUTION: The annealing method of the silica glass is for annealing the silica glass covered with a vessel, powder or board. The vessel, powder or board consists preferably of silica. And the vessel, powder or board consists of a material having >=0.004 to <0.08 (cal.s<-1> .cm<-1> . deg.C<-1> ) thermal conductivity.</p> |
