Silicon nitride
Silicon nitride is a man-made compound synthesized by several different chemical reaction methods. Parts are pressed and sintered through a well-established method to produce ceramics with unique properties. The material is available in dark gray to black in color and can be polished to a very smooth, reflective surface that gives the part an eye-catching appearance. Silicon nitride surpasses other ceramic materials in terms of thermal shock resistance. It also offers low High density, high strength, low thermal expansion, good corrosion resistance and fracture toughness. Silicon nitride has been used in many industrial applications, such as engine components, bearings, and cutting tools.
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Silion Nitride Ceramic Properties
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Properties
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Units
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Silicon Nitride (Si3N4)
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HPSi3N4
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GPSi3N4
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Mechanical
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Density
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g/cm3
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3.24~3.28
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3.24~3.26
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Color
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——
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Gray
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Gray
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Water Absorption
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%
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0
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0
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Vickers Hardness
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Gpa
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14
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14
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Flexural Strength(20°C)
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Mpa
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850-900
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750-800
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Compressive Strength(20°C)
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Mpa
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3000
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3000
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Thermal
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Thermal Conductivity(20°C)
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W/m.K
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42
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22
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Thermal Shock Resistance(20°C)
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Δ T(C)
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617
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605
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Maximum Use Temperature
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°C
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1500
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1500
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Electrical
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Volume Resistivity(25°C)
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Ω.cm
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——
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——
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Silicon Nitride (Si3N4) Characteristics:
1 Good thermal shock resistance
2 Creep resistance
3 Low density
4 High fracture toughness
5 High hardness and wear resistance
6 Electrical resistivity
2 Creep resistance
3 Low density
4 High fracture toughness
5 High hardness and wear resistance
6 Electrical resistivity
Application Industry:
Machinery, electronics, semiconductors, chemicals, petroleum, smelting. Specific applications: Welding shafts, electronic substrates, plungers, nozzles, slideways, diesel parts, metal forming, axle wheels, etc.
