Dayoo Advanced Ceramic Co.,Ltd
Dayoo Advanced Ceramic Co.,Ltd
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Alumina Precision Ceramics Redefining Industrial Standards with Diamond-Like Hardness and High-Temperature Resistance
This series of cylindrical alumina ceramic products is manufactured from 99.5% high-purity Al₂O₃, featuring HV1600 hardness and cylindricity accuracy ≤0.005mm. Through specialized sintering processes, the products achieve Ra≤0.1µm surface finish while maintaining excellent mechanical properties (flexural strength ≥350MPa), making them ideal for precision shafts, guide columns, and insulating sleeves in industrial applications.
Semiconductor Equipment: Vacuum chamber guide rods, wafer transfer shafts
Medical Devices: Dental implant abutments, surgical instrument cores
Industrial Machinery: Precision bearing sleeves, hydraulic valve cores
Measurement Instruments: CMM probe shafts, optical platform columns
Electronics Industry: Insulating sleeves, RF window support rods
✅ High Precision: Outer diameter tolerance ±0.003mm (precision grade)
✅ Wear Resistance: Wear rate <5×10⁻⁷mm³/N·m
✅ Multi-Functional: Supports conductive/insulating zone integration
✅ Environmental Stability: Stable performance from -60°C to 1200°C
✅ Biocompatibility: ISO 10993-5 certified (medical grade)
| Parameter | Standard Grade | High-Precision Grade |
|---|---|---|
| Diameter Range | Φ1-200mm | Φ0.5-100mm |
| Length Range | 5-500mm | 2-300mm |
| Cylindricity | ≤0.01mm | ≤0.003mm |
| Straightness | ≤0.02mm/m | ≤0.005mm/m |
| Surface Roughness | Ra0.2µm | Ra0.05µm |
| Compressive Strength | ≥2500MPa | ≥3000MPa |
Powder Processing: 0.3µm-grade spray granulation
Forming Methods:
Dry pressing (standard sizes)
Isostatic pressing (high aspect ratio products)
Sintering Technology: 1680°C hydrogen atmosphere sintering
Precision Machining:
Centerless grinding (diameter tolerance ±0.002mm)
Fine grinding (cylindricity ≤0.003mm)
Quality Inspection:
100% laser diameter testing
Roundness tester verification
⚠ Installation Requirements:
Recommended fit tolerance: H6/g5
Ultrasonic cleaning (isopropyl alcohol recommended) before assembly
Avoid direct hammering during installation
⚠ Usage Limitations:
Prevent localized stress concentration
Not suitable for HF acid environments
Lubrication required for dynamic applications
Quality Warranty: 24-month guarantee
Technical Support: Free tolerance analysis
Customization: Special bore/groove machining available
Fast Response: 48-hour technical consultation
Q: What is the maximum length-to-diameter (L/D) ratio?
A: Standard products L/D ≤ 20:1 (special processes up to 50:1)
Q: What surface treatments are available?
A: Options include polishing, chrome plating, and TiN coating
Q: Are medical-grade products compliant?
A: Yes, meets YY/T 0607-2020 dental ceramic standards
Q: Radiation-resistant options?
A: Available (withstands 10⁶Gy radiation)
