抽真空后开始烧结缩颈，缩颈部位烧至凹陷即可

Step 1: Silica tube necking

Frit the necking after the vacuumizing until the necking part gets sunken

第2步，装样装石英柱

将样品装入石英管，将石英柱下滑至缩颈处卡住

Step 2: Silica column sample loading

Put the sample into silica tubes ａnd slide the silica column to the necking

for locking

第3步，烧结封管

抽真空充气氛后，烧结石英柱的位置进行真空封管

Step 3: Fritting ａnd sealing

Frit the silica column ａnd conduct tube sealing after the vacuumizing ａnd gas atmosphere filling

封管成品

封管完成后可以贴上样品标签以便于区分样品

Sealing ａnd completion

Paste the sample label to identify samples after the completion of tube sealing

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