Heat insulating material near abs zero

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SUMMARY

For applications around 3K, materials such as thin stainless steel, PEEK, and Torlon are effective for use as bolts or screws in cryostats. These materials minimize heat conduction, making them suitable for low-temperature environments. It is crucial to avoid good electrical conductors like copper, silver, and gold, as well as hard materials such as sapphire and diamond, which can compromise thermal insulation. Stainless steel and brass are recommended for metal components due to their low thermal conductivity at cryogenic temperatures.

PREREQUISITES
  • Understanding of cryogenic temperatures and their effects on materials
  • Knowledge of thermal conductivity and insulation principles
  • Familiarity with materials like PEEK and Torlon
  • Basic concepts of mechanical fastening in low-temperature environments
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  • Research the thermal properties of PEEK and Torlon at cryogenic temperatures
  • Explore the mechanical properties of stainless steel and brass in low-temperature applications
  • Investigate alternative materials for cryogenic insulation
  • Learn about the design considerations for cryostats and their components
USEFUL FOR

Engineers, material scientists, and researchers working in cryogenics or designing cryostats will benefit from this discussion.

theory.beta
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hi all,

I was wondering if there is any industrial/common type of material (at around temperature of 3K) that can function as bolts/screws or thin sticks. This is to be used in a cryostat and ideally prevent any heat conduction from the material it is attached to during the process.

Thanks in advance

S.

PS. I apologize if this post has been placed in the wrong section of the forum
 
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Thin stainless steel or various types of plastic are often used, e.g. PEEK or Torlon. Keep cross sections small and make distances large. Avoid good electrical conductors (copper, silver, gold,...) and very hard materials (sapphire, diamond,...).
 
Stainless steel or brass (alloys are bad conductors of heat at low temperature) if you need it to be made of metal.
Otherwise any type of plastic will - as M Quack alread pointed out- work well.
 

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