MoSi2 Heating Elements

 
The leading products of the company Bongsa Molybdenum Disilicide Heating Element Type BS-1700 and BS-1800 element is a high-tech product researched and developed by experts from China and abroad．MoSi₂ heating element can quickly form a thin and adhesive anti-oxidizing layer of quartz glass(SiO₂)，under the high temperature oxidizing condition．If the protective layer was damaged，the element can reform a new one，so MoSi₂ heating element has a very good anti-oxidation properties，it also means that the heating element can be used on operation for a much longer time than the traditional one．
The resistivity of the MoSi₂ heating element is not changing with the time，so a new one can be installed without affecting the old one，this can result of huge saving in furnace maintenance fees and time as well，increase the working efficiency，this is the key point of MoSi₂ heating element being a better material and being widely used．
  
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．
Notice：It is no good to use Molybdenum Disilicide Heating Element for long—term within a range of 400-700℃．Otherwise the element will be powdered by the strong low temperature oxidation．
 
Indicators in Different Atmosphere    
Maximum Recommend Element Temperature

Atmosphere	1700Type	1800Type
Air	1700	1800
N2   Nitroge	1600	1700
He Ar Ne Argon, Helium	1600	1700
Dry Hydrogen (dew point)	1150	1150
Wet Hydrogen (dew point)	1450	1450
e.g.10%CO2，50%CO.15H2	1600	1700
e.g.40%CO2，20%CO	1400	1450
Cracked and partially brunt ammonia	1400	1450

 
 
 
Resistance Properties
    
The resistivity of MoSi₂ Heating Element increases sharply with temperature，faster warming and power consumption low．The resistance of MoSi₂ Heating Element does not change due to ageing even after having been in operation for a long time at high temperatures．There is only a slight reduction during the first period of time．Which means element can easily be replaced without the performance of other elements connected in series being influenced．
 
 
 
 
a．Product has the capabilities to resistance to oxidation and automatically repair，suitable for continued using in any kinds of oxidizing atmospheres．
b．Product is shaped in hot-working process，which keeps the base material in good tenacity and plasticity at high temperature．Thegeometrical figure，standard and dimension is canonical，may produce any special shape and any dimension to meet the customer requirement．
c．Because of the special technics，welding spot is fast and shock resistance，which dramatically reduced the damaged probability of welding spot by electric current，as welI as transit and installation．
d．High density of  product increases its electrical conductivity．The characters of faster warming and power consumption low，which re-duce production cost．
e．Good appearance quality and tenacity，high mechanical strength.