1900 grade high purity molybdenum disilicide heating element

 

1800℃ ( 3272°F ) Bent 45° in Lu Molybdenum Disilicide ( MoSi2 ) Heating Element for Furnaces

 

Physical Properties:

 

Density G/cm3	Bending Strength MPa	Hardness GPa	Compression Strength MPa	Water Absorption %	Heated Elongation %
6.0±0.1	500	12	1500	≤0.2%	4

 

Chemical Properties

MoSi₂ Heating Elements have the ability to withstand oxidation at high temperatures, which is due to the formation of a thin and adhesive protective layer of quartz glass (SiO₂) on the surface. When the element temperature increases to over 1700℃, the SiO₂ protective layer, with melting point being 1710℃ will be fused, and because of the surface tension, it will be fused into drops, which is useless. however, when element continue working in oxidizing atmospheres, the SiO2 protective layer is spontaneously rebuilt.

Note: It is better not use Molybdenum Disilicide Heating Elements for a long time within a range of 400-700℃, otherwise the element will be powdered by the strong low temperature oxidation.

Indicators in Different Atmospheres

Atmosphere	SP1700	SP1800
Air	1700	1800
N2 Nitrogen	1600	1700
Ar Ne Argon, Helium	1600	1700
Dry Hydrogen (dew point)-80℃	1150	1150
Wet Hydrogen (dew point)-20℃	1450	1450
Exogas (e.g. 10% CO2, 50% CO, 15%H2)	1600	1700
Exogas (e.g. 40% CO2, 20% CO)	1400	1450
Cracked and partially burnt ammonia	1400	1450