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Mosi2 Heating Element
Furnace Concepts Cermet Molybdenum disilicide heating elements (high temperature heating elements)
MOSI2 Heating Elements is a kind of resistance heating element basically made of high pure Molybdenum Disilicide. In oxidizing atmosphere , a layer of compact quartz protective film is formed on the surface of mosi2 element owing to the high-temperature combustion ,which prevent MOSI2 from continuously oxidizing . In oxidizing atmosphere , its max temperature can reach 1800 degree , and its applicable temperature is 500~1700 degree . it can be widely used in such applications as sintering and heat treatment of ceramics , magnet, glass , metallurgy , refractory .etc.
Having the same mechanical character as other ceramic products , MOSI2 heating elements are brittle materials so that they are easy to rupture at the normal temperature , which brings some difficulties to transport and install , but it may be avoided if they were installed and used correctly .
- Volume density : 5.5~5.6kg/cm3
- Bend strength : 15~25kg/cm2
- Vickers-hadness : (HV) 570KG/MM2
- Porosity Rate : 7.4%
- Water Absortion : 1.2%
- Hot Extensibility : 45
Oxygen -resistance under high temperature : in oxidizing atmosphere , a layer of compact quarts (sio2) protective film is formed on the surface of element owing to the high -temperature combustion , which prevent MOSI2 from continuously oxidizing .When he element temperature is higher than 1700 degree . the sio2 protective film will be fused because its fusing point is 1710 degree and the sio2 is fused nto molten dropa owing to the action of its surface extension ,whic cause losing its protective ability . In the oxidizing atmosphere, when the element is continuously used , the protective film forms again .
It should be point out that element cnnot be used for rather longtime in 400-700 degree . otherwise it will be powdered owing to the strong oxidizing action in low temperature .