No Ozone 5ml Neutral Glass Tube In Chemistry Lab

No Ozone Neutral Glass Tube Good Electrical Performance​

The size and distribution of the permanent stress caused by the thermal process in each part of the product will not be uniform, therefore, it will affect the strength of the glass product, and even break by itself due to stress concentration. Annealing can eliminate harmful tension inside the glass and prevent new stress from being generated. During annealing, heat the glass product or keep it to the annealing temperature after thermoforming, so that the original stress is relaxed and eliminated, and then slowly cooled to below the strain temperature. After the glass has completely entered the state of rigid body, the temperature difference between the inner and outer layers only produces temporary stress .

1, rotation speed: in a centrifuge tube expansion process, the rotational speed and diameter determined centrifugal force. When the pipe diameter is constant, the higher the speed, the greater the centrifugal force. Under the action of centrifugal force, the larger the pipe diameter, the slower the speed. Thus, during the pipe expansion rate should be used as the basis to the diameter of the glass tube
2, the wall thickness is determined, and the corresponding temperature. Heating and softening the pressure in the pipe expansion process, the control diameter sizing device mainly depends on a set of synchronous rotation of the glass tube, it requires a wider range of speeds.