|Porosity:||0||Raw Material:||Silicon Nitride|
ceramic heating rod,
thermocouple protection tubes
High temperature and strength black silicon nitride ceramic ring
|Mechanical properties||Vickers hardness load 500g||(GPa)||13.9|
|Young's modulus of elasticity||GPa||290|
|Thermal characteristics||Linear thermal expansion coefficient||40-400℃||×10-16/℃||2.6|
|Thermal shock resistance(Put into the water)||℃||550|
|Electrical characteristics||Dielectric strength||V/m||10×106|
|Dielectric constant (1MHz)||-||-|
|Dielectric loss angle (1MHz)||(×10-4)||-|
|Chemical properties||Nitric acid (60%) 90℃||
|sulfuric acid (95%) 95℃||0.40|
|Sodium hydroxide (30%) 80℃||0.36|
If a silicon nitride ceramic that is resistant to high temperatures and does not easily transfer heat is used to manufacture the heating surface of the engine component, not only the quality of the diesel engine can be improved, fuel is saved, but also thermal efficiency can be improved. The silicon nitride ceramic can be used as a gas turbine combustion chamber, a silicon nitride mechanical seal ring (silicon nitride ring), an electromagnetic pump pipe (silicon nitride tube) for conveying aluminum liquid, a valve, a permanent mold, a molten steel separation ring, and the like. Si3N4 ceramic is a covalent bond compound.
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