Dayoo Advanced Ceramic Co.,Ltd
Dayoo Advanced Ceramic Co.,Ltd
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Thermal Shock-Resistant Solution Silicon Nitride Ceramics For Temperature Applications
Product Description
This product is a structural component precision-machined from high-performance silicon nitride (Si₃N₄) ceramic material. It features an integrated design consisting of a rectangular base with a cylindrical boss vertically connected at the center of the top surface. The component exhibits the characteristic dark gray-black color of silicon nitride ceramic. Precision circular through-holes are located on the boss and at the four corners of the base. The overall design is simple yet robust, reflecting an optimal balance of functionality and reliability. This part fully utilizes the exceptional properties of silicon nitride ceramic, including high strength, high hardness, wear resistance, high-temperature tolerance, and excellent electrical insulation, making it an essential basic functional component designed for precision industrial equipment.
Primary Applications
Thanks to its excellent comprehensive properties, this component is widely used in:
Fixed Mounts for Precision Equipment: Serving as installation bases for high-precision devices like measuring instruments and optical platforms, ensuring structural stability and dimensional permanence.
High-Temperature Insulating Connectors: Acting as electrical insulating supports in high-temperature environments such as semiconductor equipment and vacuum furnaces, while bearing mechanical loads.
Guiding and Positioning Components in Automation: Used as precise positioning modules in automated equipment like robotic arms and conveyor lines, leveraging its wear resistance and low friction coefficient.
Structural Parts for Special Environments: Suitable for equipment frames and connection structures in harsh conditions like strong magnetic fields or highly corrosive atmospheres.
Key Advantages
Exceptional Mechanical Properties: Flexural strength ≥600 MPa, hardness HRA ≥92, combined with good fracture toughness.
Outstanding Heat Resistance: Can operate continuously in environments up to 1200°C, with a low coefficient of thermal expansion (3.2 × 10⁻⁶/K).
Excellent Wear Resistance: Wear rate is orders of magnitude lower than metallic materials, resulting in an extremely long service life.
Superior Electrical Insulation: Volume resistivity >10¹⁴ Ω·cm, dielectric strength >15 kV/mm.
Stable Chemical Performance: Resistant to acid and alkali corrosion, and does not react with most molten metals.
Self-Lubricating Properties: Low friction coefficient (0.1-0.3), capable of operating without lubrication.
Specifications Table
| Parameter | Technical Specification |
|---|---|
| Primary Material | Hot-Pressed Sintered Silicon Nitride |
| Color | Dark Gray-Black |
| Density | 3.2 - 3.3 g/cm³ |
| Flexural Strength | ≥600 MPa |
| Fracture Toughness | ≥6.0 MPa·m¹/² |
| Maximum Service Temperature | 1200 °C (Inert Atmosphere) |
| Thermal Conductivity | 15 - 30 W/(m·K) |
| Hole Diameter Tolerance | ±0.01 mm (Customizable) |
| Flatness | ≤0.02 mm/100 mm |
| Surface Roughness | Ra ≤ 0.4 μm |
Manufacturing Process
Raw material formulation (High-purity Si₃N₄ powder + sintering aids) → Ball milling and mixing → Drying and granulation → Steel mold pressing → Cold isostatic pressing (CIP) → High-temperature sintering (1750-1850°C) → Precision surface grinding → CNC drilling → Dimensional inspection → Ultrasonic cleaning → Packaging and storage.
Usage Instructions
Use a torque wrench for installation, tightening bolts gradually in a diagonal sequence.
When assembling with metal parts, the use of elastic washers for buffering is recommended.
Avoid prolonged contact with highly corrosive media like hydrofluoric acid and hot concentrated alkaline solutions.
Regularly check the preload state of the installation bolts.
After-Sales Service
24-month quality warranty period.
Technical support team available 7x24 for responses.
Customization based on drawings provided, with free technical consultation and selection guidance.
Customer usage records maintained, with regular quality follow-up visits.
Frequently Asked Questions (FAQ)
Q: What are the advantages compared to zirconia ceramics?
A: Silicon nitride offers better thermal shock resistance (ΔT > 800°C) and a higher maximum operating temperature, making it more suitable for environments with rapid temperature changes.
Q: What is the maximum achievable machining size?
A: Currently, the maximum size for a single integrated component is 300 × 300 × 100 mm. Special sizes can be customized.
Q: Can secondary machining be performed after sintering?
A: The sintered product has extreme hardness. Only minor adjustments using diamond tools are possible. Customization to the final desired dimensions is recommended.
