MOSI2 Heating Elements

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Mosi2 heating elements

A. Mosi2 heating elemens characteristic

1. High temperature MoSi2 heating element for various electric furnaces.
2.Max. working temperature over 1800 ℃, safety operating temp. 1650 ℃and below
3. Long life combined with ease of replacing failed elements contributes to a high degree of utilization of the furnace and low maintenance costs.
4. New and old elements can be connected in series
5. High power concentration may be applied
6. Can be used continuously or intermittently
7. Fast ramping

B.Chemical Properties
MoSi2 Heating Element has the ability to withstand oxidation at high temperatures. This is due to the formation of a thin and adhesive protective layer of quartz glass (SiO2) on the surface. When the element temperature over 1700℃, SiO2 protective layer which melting point is 1710℃ was fused, and because of the surface tension, it fused into drops, which is useless. However, when element continue working in oxidizing atmospheres, the SiO2 protective layer is spontaneously rebuilt.

C. Different atmosphere effect on use temperatures 

Atmosphere Highest Working Temperature
  (1700 Type) (1800 Type)
NO2、CO2、O2、Air 1700℃ 1800℃
He、Ar、Ne 1650℃ 1750℃
SO2 1600℃ 1700℃
CO、N2 1500℃ 1600℃
Wet H2 1400℃ 1500℃
Dry H2 1350℃ 1450℃

D. Notice

It is no good to use Mosi2 heating elements for Long-term within a range of 400-700℃, otherwise the element will be powdered by the strong low temperature oxidation..


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