What are the types of pipes used in vacuum tube furnaces？

There are various types of pipe materials for vacuum tube furnaces, each with its specific application scenarios and performance characteristics. The following are several common types of vacuum tube furnace pipes:

Quartz tube:
Features: Quartz tubes have high purity, high transparency, and good thermal stability. It can withstand high temperature environments and is not easily deformed or ruptured under high temperatures.
Application: Quartz tubes are widely used in vacuum tube furnaces for sintering, heat treatment, and other processes of various materials. Due to its high transparency, quartz tubes are also convenient for observing the heating process of materials inside the furnace.
Temperature range: The temperature limit for the use of quartz tubes is usually between 1200 ℃ and 1500 ℃, depending on the purity and manufacturing process of the quartz tubes.

Corundum tube (aluminum oxide tube):
Features: Corundum tubes are made of high-purity aluminum oxide and have extremely high thermal and chemical stability. It can work for a long time at high temperatures without being easily damaged, and has good corrosion resistance to most chemicals.
Application: Corundum tubes are commonly used in vacuum tube furnaces that require higher temperatures or more corrosion-resistant environments, such as sintering of ceramic materials and high-temperature oxidation of metals.
Temperature range: The temperature range for using corundum tubes is usually higher, reaching 1600 ℃ or even higher.

Alloy tube:
Features: Alloy pipes are made of metal or alloy materials and have excellent mechanical properties and high temperature resistance. It can withstand high pressure and weight, and maintain stable structural performance even at high temperatures.
Application: Alloy tubes are usually used in vacuum tube furnaces that require high mechanical stress and high temperature environments, such as heat treatment, welding, and other processes of metal materials.
Temperature range: The temperature range for the use of alloy pipes depends on the specific alloy material and manufacturing process, and can usually reach higher temperatures.

In summary, there are various types of pipe materials for vacuum tube furnaces, including quartz tubes, corundum tubes, and alloy tubes. Each type of pipe has its specific characteristics and application scenarios, and selecting the appropriate pipe is crucial to ensure the performance and safety of vacuum tube furnaces.