Silicon nitride ceramic sheet
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材料及含量
产品特点
1. Dimensions: Common sizes include 20×20×9mm, 30×30×4mm, 50×50×0.32mm, 100×100×4mm, 107×107×4mm, and various other specifications.
2. Density: 2200-3200 kg/m³ (theoretical density 3100 kg/m³).
3. Working Temperature: Can withstand 1200℃ for short periods, with a high-temperature strength retention rate of up to 85%.
4. Bending Strength: 800-1000 MPa at room temperature, and still maintains over 500 MPa at 1200℃.
产品详情
Main Characteristics
1. Physical Properties:
Mechanical Properties: Bending strength reaches 780-980 MPa, fracture toughness is 6.5-8.5 MPa·m¹/², more than twice that of alumina and aluminum nitride.
Hardness: Vickers hardness is 15-22 GPa (close to cubic boron nitride).
Wear Resistance: Surface friction coefficient is as low as 0.4-0.6, capable of resisting high-frequency friction and wear.
2. Thermal Properties:
Thermal Conductivity: 80-120 W/(m·K), five times that of alumina.
Coefficient of Thermal Expansion: 3.0×10⁻⁶/℃, perfectly matched with silicon chip materials.
Thermal Shock Resistance: Strength retention rate >90% during severe temperature cycling from -50°C to 1000°C.
3. Chemical Properties:
Corrosion Resistance: Almost no reaction with molten metals (aluminum, copper) and acid and alkali solutions (except HF) below 1200°C.
Insulation: Volume resistivity >10¹⁴ Ω·cm, breakdown field strength >15 kV/mm.
Application areas
贸易信息
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