The vacuum sealing problem of quartz tube is discussed
A lot of people haven't touched this. You can learn from the quartz tube manufacturers and dealers, and they are very willing to help you answer.
The process of pumping quartz is a special vacuum pumping machine. After pumping, it can be sintered and sealed at the upper end of the test tube by high temperature. The pipe can only be used once. General quartz tube radius can not be too big, and vacuum machine mouth on the general 5mm or so, the length to have a dozen centimeters, because too short, when sintering, will affect the sample.
The grinding quartz test tube should be able to meet your requirementHeat at the bottom,The upper part of the grinding mouth with the plug hole and sealing grease,No problem with repeated use.
