High-Temperature Thermal Conductivity Testing (ASTM C201)

  

Vinod Kumar
Published : April 4, 2023

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High-Temperature Thermal Conductivity Testing (ASTM C201)

Aluminum, calcium, magnesium, and silicon oxides are frequently used in the production of refractory materials. At high temperatures, they maintain their shape and strength and don’t decompose. Refractory materials can withstand the effects of heat, pressure, and chemicals. These materials are categorized as conducting, nonconducting, or insulating based on their thermal conductivity.

Refractories’ thermal conductivity can be measured using the ASTM C201 standard test method to ascertain their thermal transmission capabilities as well as their physical, chemical, and mechanical properties. For industries like iron and steel, ceramics, equipment, and the military, knowing the thermal conductivity characteristics is essential for helping them choose a material that meets their desired parameters for cold face temperature and heat loss. Additionally, it aids these sectors in ensuring the caliber of their output for safer use.

A heating chamber that can produce temperatures between 400 degrees Fahrenheit and 2,800 degrees Fahrenheit is used in the thermal conductivity of refractories tests. Several measurements are made as this heat moves through the refractory material:

• The volume of the heat flow will be measured by a copper calorimeter that is water-cooled.
• The temperature of the substance will be read by calibrated thermocouples.
• The rise in water temperature in the calorimeter will be measured using a multiple differential thermocouple.
• The temperature difference between the inner guard and the calorimeter will be measured using differential 10X copper constantan thermocouples that have been calibrated.
• It is possible to gauge the performance of the refractory material under constant conditions and a large heat gradient.

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