MoSi2

 [Chemical symbol] formula: MoSi2 [Physical and Chemical Properties Density: 5.5 ~ 5.6g / cm3 bending strength: 15MPa (20 ℃) ??Vickers hardness (HV): 570kg / mm2 porosity: 7.4% Water absorption: 1.2% hot stretch Long rate: 4% emissivity coefficient: 0.7 ~ 0.8 (800 ~ 2000 ℃) MoSi2 heating element is a kind of molybdenum disilicide is made of high temperature based, anti-oxidation, low aging resistance heating element. When used at high temperature oxidizing atmosphere, surface layer of bright dense quartz (SiO2) glass membrane that protects the inner silicon molybdenum rod no longer oxidized, silicon molybdenum rod element has a unique high-temperature oxidation resistance. In an oxidizing atmosphere, the maximum temperature of 1800 ℃, resistance MoSi2 heating elements increases rapidly with increasing temperature, the resistance value when the temperature is constant and stable. Under normal circumstances the element resistance not change over the length of time of use, so that the old and new silicon molybdenum rod heating elements can be mixed. Heating equipment according to the device structure, the work atmosphere and the temperature of the surface load heating element was the correct choice is the key MoSi2 heating element life. 2 Application MoSi2 heating elements are widely used in metallurgy, steel, glass, ceramics, refractories, crystals, electronic components, semiconductor materials research, manufacturing and other fields, especially for high-performance precision ceramic, high-grade IOL, precision structural metal ceramics, glass fiber, optical fiber and advanced steel production. Silicon molybdenum rods of silicon carbide heating element is non-metallic, with high-purity green hexagonal silicon carbide as the main raw material, made of recrystallization temperature 2200 ℃, the normal temperature up to 1450 ℃, fair use under conditions of continuous use for more than 2000 hours in the air use, does not require any protective atmosphere. For a variety of electric electric kiln. Silicon molybdenum rod with high resistance to oxidation at high temperature atmosphere, the surface of the original generation of a dense layer of quartz SIO2 protective layer to prevent oxidation MOSI2 continue. When the element temperature is greater than 1700 degrees, melting point 1710 ° SIO2 protective layer melt due to surface tension, SIO2 agglomerating into drops, and lose protection. Element in an oxidizing atmosphere while continuing to use, SIO2 protective layer to regenerate. If the power supply system with automated matching can get an accurate constant temperature, but also the thermostat according to the curve based on the actual needs of the production process. Now widely used in national defense, machinery, metallurgy, light industry and chemicals, ceramics, semiconductors, field laboratory analysis, research, etc., for a variety of electric heating elements electric kiln tunnel kiln, roller kiln, glass furnace, vacuum furnace , muffle furnace, smelting furnace and a variety of heating equipment, the use of silicon carbide heating is convenient, safe and reliable. Is widely used in a variety of high-temperature furnace, electric kiln electronic, magnetic materials, powder metallurgy, ceramics, glass, metallurgy and machinery industries. And the electric heating equipment.