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Tubular Heaters

Keith Company

  • Tubular heating element / molybdenum
  • Tubular heating element / molybdenum
  • Tubular heating element / molybdenum
  • Tubular heating element / molybdenum

Article: 00136887

Tubular heating element / molybdenum

Molybdenum disilicide (MoSi2) elements are available in a variety of shapes and sizes and feature the highest operating temperatures and watt loadings of the elements under consideration. (1850C) They also have stable resistance, which allows new and old elements to be connected in series. Fast thermal cycling is possible without element degradation, and the elements are relatively easy to change while the furnace is hot. MoSi2 elements also offer the longest inherent life of all electric heating elements.

Molybdenum disilicide elements are manufactured in several grades of elements, with the primary difference being the MET in a certain atmosphere. The METs in non-air atmospheres and vacuum are significantly higher than those for metallic or SiC elements due to the stability and regeneration characteristics of the protective layer that forms on the surface. If the elements are used at low temperature in air, an oxidation can occur at around 550C that produces a yellowish powder on the element surface. This so-called pest oxidation has no detrimental effect on the performance of the MoSi2 heating element, but is a potential source for product contamination, so operation in this temperature range should be avoided.

Specifications

  • Type: tubular
  • Material: molybdenum

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