Dayoo Advanced Ceramic Co.,Ltd
| High Thermal Conductivity | Yes |
| Material | Silicon Carbide |
| Application | Structure Ceramic, Industrial Equipment |
| Mineral Type | Silicon Carbide |
| Chemical Inertness | High |
| Custom Service | Acceptable |
| Compressive Strength | 2,000 MPa |
| Electrical Resistivity | 10^5 Ω·cm |
| Thermal Expansion | 4.5 X 10-6/K |
| Electrical Conductivity | Semi-conductive |
| Size | Customers' Requests |
| Density | 3.21 g/cm3 |
| Shape | Customize |
| Wear Resistance | Excellent |
| Temperature Resistance | Up to 1,400°C |
| Place of Origin | Made In China |
| Brand Name | Dayoo |
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Product Specification
| High Thermal Conductivity | Yes | Material | Silicon Carbide |
| Application | Structure Ceramic, Industrial Equipment | Mineral Type | Silicon Carbide |
| Chemical Inertness | High | Custom Service | Acceptable |
| Compressive Strength | 2,000 MPa | Electrical Resistivity | 10^5 Ω·cm |
| Thermal Expansion | 4.5 X 10-6/K | Electrical Conductivity | Semi-conductive |
| Size | Customers' Requests | Density | 3.21 g/cm3 |
| Shape | Customize | Wear Resistance | Excellent |
| Temperature Resistance | Up to 1,400°C | Place of Origin | Made In China |
| Brand Name | Dayoo | ||
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Product Introduction
This product is an industrial ceramic stepped sleeve manufactured from high-purity silicon nitride (Si3N4), specifically designed for high-end mechanical equipment and extreme operating conditions. It features a pure black color with a fine, uniform matte texture, highlighting the material's high density and exceptional wear resistance. The innovative stepped design incorporates a wide flanged rim at the top, a cylindrical main body, and a precision-machined coaxial stepped bore inside. All components feature accurate dimensions and smooth, flat contact surfaces, with machining accuracy reaching micrometer levels to ensure perfect fit in precision assemblies. This silicon nitride ceramic stepped sleeve perfectly combines superior material properties with innovative structural design, making it an ideal choice for upgrading modern high-end equipment.
Core Advantages
Exceptional Wear Resistance: Hardness above HRA 92, wear rate only 1/10 of bearing steel
Outstanding High-Temperature Performance: Can operate continuously at 1400°C, with instantaneous temperature resistance up to 1600°C
Comprehensive Corrosion Resistance: Withstands strong acids, alkalis, and various organic solvents
Excellent Mechanical Properties: Compressive strength >2000 MPa, flexural strength >600 MPa
Self-Lubricating Characteristics: Friction coefficient below 0.15, enabling oil-free operation
Lightweight Design: Density of 3.2 g/cm³, over 60% weight reduction compared to metal materials
Typical Applications
High-speed electric spindle ceramic bearing housings
High-pressure sealing chambers for chemical machinery
Multi-stage positioning components in precision instruments
Aerospace transmission systems
Insulating structural parts for new energy equipment
Specifications Table
| Parameter Category | Technical Specifications |
|---|---|
| Base Material | High-Purity Silicon Nitride (Si3N4 ≥99%) |
| Product Color | Pure Black Matte |
| Material Density | 3.20-3.25 g/cm³ |
| Surface Hardness | HRA 92-94 |
| Compressive Strength | ≥2000 MPa |
| Flexural Strength | 600-800 MPa |
| Maximum Service Temperature | 1400 °C (in oxidizing atmosphere) |
| Coefficient of Thermal Expansion | 3.0-3.2×10⁻⁶/°C |
Manufacturing Process
Raw Material Selection → Nano-level Ball Milling → Spray Granulation → Bidirectional Press Forming → Isostatic Pressing → Gas Pressure Sintering → Ultrasonic Flaw Detection → CNC Precision Grinding → Laser Dimensional Inspection → Vacuum Packaging and Storage
Usage Instructions
Pre-Installation Treatment: Clean the mounting surfaces with absolute ethanol to ensure dust-free assembly.
Flange Mounting: Fix using specialized clamps through the evenly distributed mounting holes on the flange.
Stepped Bore Adaptation: Select the corresponding stepped bore size based on the shaft diameter to ensure optimal fit.
Temperature Adaptation: Consider differences in thermal expansion coefficients during installation and reserve appropriate clearance.
Regular Maintenance: Check the fit clearance every 500 hours of operation.
After-Sales Service
We provide comprehensive technical support and after-sales service. The product comes with an 18-month warranty and lifetime maintenance. 7x24 technical consultation is available with a 48-hour emergency response. On-site installation guidance and regular follow-up services are provided.
FAQ
Q: What are the main advantages of the stepped bore design?
A: It allows adaptation to multiple shaft diameters, reduces parts inventory, and improves assembly flexibility.
Q: Is custom non-standard design supported?
A: Full customization is supported. Parameters like flange dimensions and stepped bore specifications can be adjusted according to customer requirements.
Q: How does it perform in humid environments?
A: Silicon nitride material has excellent hydrolysis resistance, suitable for long-term use in high-humidity environments.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Total Annual:
>1000000
Employee Number:
>100
Ecer Certification：
Verified Supplier
We are a company with many years of experience in the production of special precision ceramics and the ability to design, manufacture, process and sell structural and functional parts of various special precision ceramics. Deyu Precision Ceramics Technology Co., Ltd. has many years of e... We are a company with many years of experience in the production of special precision ceramics and the ability to design, manufacture, process and sell structural and functional parts of various special precision ceramics. Deyu Precision Ceramics Technology Co., Ltd. has many years of e...
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