Resistance heating is employed to obtain temperatures up to 3000°C in a graphite tube furnace, and up to 2200°C in a molybdenum tube furnace, both operating from the same controls. Partial control of the atmosphere is accomplished in the former case; the latter furnace may be operated in vacuo, or selected atmospheres. Provision is made for the application of pressure to samples at high temperature. The furnaces have been found to be useful and reliable tools in refractories laboratories, and examples of their application are given.
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For this heating element power is taken directly from the secondary winding of the variable transformer and the temperature is limited to 1650°C.
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© 1957 The American Institute of Physics.
1957
The American Institute of Physics
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