| Place of Origin: | Wuxi , China |
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| Minimum Order Quantity: | 50 Pieces |
| Delivery Time: | 7-15 work days |
| Payment Terms: | L/C, T/T |
| Supply Ability: | 1000 Piece/Pieces per Month |
| Material: | Zirconia Ceramic, Engineering Ceramics | Application: | Structure Ceramic, Industrial Equipment |
|---|---|---|---|
| Processing Service: | Custom Processing | Certification:: | ISO9001:2015 |
| Quality Control: | 100% Inspection | Drawing Format: | 2D/(PDF/CAD)3D(IGES/STEP) |
| High Light: | silicon nitride ceramic si3n4 bearing balls BPT,silicon nitride ceramic bearing BPT,silicon nitride bearings BPT |
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Silicon nitride (Si3N4 ) ceramics
Silicon nitride ceramic is an inorganic material that does not shrink during sintering. It uses silicon powder as the raw material, first uses the usual molding method to make the required shape, and performs preliminary nitridation in nitrogen and at a high temperature of 1200 ℃, so that a part of the silicon powder reacts with nitrogen to form silicon nitride. The second nitridation is carried out in a high temperature furnace at 1350°C to 1450°C, and the reaction becomes silicon nitride. The hot-pressing sintering method can be used to obtain silicon nitride with a theoretical density of 99%.
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Silicon nitride ceramic characteristics
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Property
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Item
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Data
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Unit
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Mechanical Characteristics
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color
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black/grey
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| density |
3.2
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g/cm3
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|
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Bending Strength
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750
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MPa
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| Compressive Strength |
3800
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MPa
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| Elastic Modulus |
290
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GPa
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| Fracture Toughness |
7
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MPa m1/2
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| Weber Coefficient |
15
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m
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| Vickers Hardness |
1,700
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HV 0.5
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Thermal Characterics
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Coefficient of Line Thermal Expansion
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2
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10-6 K-1
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Thermal Conductivity
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20
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W/mK
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Thermal Shock Resistance (Put in Water)
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750
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ΔT °C
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Max Working Temperature(in air)
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1,300
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°C
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Electrical Characteristics
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Volume Resistance at 20°C
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>1014
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Ωcm
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Dielectric Strength
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10×106
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V/m
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Chemical Characteristics
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Nitric Acid (60%) 90°C
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1
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WT Loss mg/cm2/day
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Sulphuric Acid (95%) 95°C
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≒0.00
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Caustic Soda (30%) 80°C
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0.2
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