Muffle furnace, high-temperature furnace, tube furnace, etc., are widely used laboratory heating equipment, they are always used for studying metals, ceramics, polymers, and other raw materials, most of them must be evacuated to carry out experiments, in these heating equipment belong to the tube furnace on the evacuation performance indicators are stronger.
Tube furnaces are generally used under vacuum, but for many new users, there are still questions about how to evacuate the problem, such as the use of a high-purity alumina tube (also known as corundum tube) in the case of the tube, is only the gas in the tube, or the overall vacuum? On this issue, our suggestions are as follows.
1.if your corundum tube is hermetically sealed concerning the whole tube furnace, then the tube can be vacuumed separately.
2. If the corundum tube is connected to the furnace body, then the entire furnace body should be evacuated.
In addition, if the aluminum oxide tube is pumped separately, the pressure-bearing capacity of the corundum tube should be considered, and thicker alumina tubes should be chosen as much as possible.
If the gas to be pumped is hydrogen, choose a pump with low heat generation, otherwise, it is easy to explore.
Warm tips, when not familiar with the detailed use of the tube furnace, do not rashly operate it, otherwise, it may cause damage to the furnace or its components, bringing losses, and in serious cases, dangerous, affecting the safety of the operator.
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