Tube furnaces are essential pieces of equipment in many laboratories.
They are usually made with work tubes that are made from different materials depending on the desired application.
The most common materials used for work tubes are ceramic materials such as mullite or recrystallized alumina (RCA), quartz glass, or metals such as stainless steel or Inconel.
The choice of work tube material is important because it needs to be able to withstand the maximum operating temperature and have appropriate chemical resistance to prevent unwanted reactions with the sample materials.
5 Key Materials Explained
1. Ceramic Materials
Ceramic materials like mullite and recrystallized alumina (RCA) are commonly used in work tubes.
These materials are known for their ability to withstand high temperatures and provide good chemical resistance.
2. Quartz Glass
Quartz glass is another popular choice for work tubes.
It offers excellent transparency and can handle high temperatures without deforming.
3. Metals
Metals such as stainless steel and Inconel are also used in work tubes.
These materials are durable and can withstand extreme temperatures and chemical environments.
4. Heating Chamber
The tube furnace itself consists of a heating chamber.
The heating chamber is usually made of high-temperature ceramics and has a circular wall, either a complete cylindrical element or two semi-cylindrical elements brought together to form a cavity.
5. Heating Elements
Refractory heating coils or bands are embedded in the ceramic and surround a central chamber equipped with evenly distributed heaters.
This construction ensures the highest thermal uniformity when processing inorganic and organic compounds.
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