Dayoo Advanced Ceramic Co.,Ltd
| Delivery Time | Negotiable |
| Payment Terms | Negotiable |
| Relative Density | 99% |
| Low Friction Coefficient | 0.2 |
| Electrical Insulation | Yes |
| Thermal Expansion | 3.4*10(4) ℃ |
| Style | Multi-functional |
| Insulation Resistance | 1012-1014 Ω.cm |
| Max Operating Temperature | 1200°C |
| Shape | negotiable |
| Roughness | minimum 0.1um |
| Dimensional Stability | High |
| Blade Material | Zirconia Ceramic |
| Working Temperature | ≤1200℃ |
| Port | Shanghai |
| Processing Service | Custom processing |
| Origin | made in China |
| Packaging Details | Carton |
| Place of Origin | Made In China，Zhejiang，Jinhua |
| Brand Name | Dayoo |
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Product Specification
| Delivery Time | Negotiable | Payment Terms | Negotiable |
| Relative Density | 99% | Low Friction Coefficient | 0.2 |
| Electrical Insulation | Yes | Thermal Expansion | 3.4*10(4) ℃ |
| Style | Multi-functional | Insulation Resistance | 1012-1014 Ω.cm |
| Max Operating Temperature | 1200°C | Shape | negotiable |
| Roughness | minimum 0.1um | Dimensional Stability | High |
| Blade Material | Zirconia Ceramic | Working Temperature | ≤1200℃ |
| Port | Shanghai | Processing Service | Custom processing |
| Origin | made in China | Packaging Details | Carton |
| Place of Origin | Made In China，Zhejiang，Jinhua | Brand Name | Dayoo |
| High Light | silicon nitride machining si3n4 ，si3n4 ceramic thermal shock resistance ，thermal shock resistance silicon nitride machining | ||
Product Overview
This product is a silicon nitride double crescent disc manufactured using isostatic pressing technology. It features an elegant dark gray color with optically-level flatness achieved through double-sided grinding. The product adopts a unique symmetrical crescent design, with two disc structures in perfect mirror symmetry, and all edges feature rounded corners to ensure no stress concentration. This precision structural design ensures optimal stress distribution and installation stability while maintaining functionality.
• Precision Sealing: High-temperature and high-pressure equipment sealing gaskets, vacuum chamber sealing components
• Optical Instruments: Laser equipment shading discs, optical system aperture components
• Mechanical Engineering: Precision bearing spacers, transmission system wear-resistant shims
• Semiconductor Manufacturing: Wafer handling fixtures, etching equipment insulation discs
• Medical Devices: High-precision instrument isolation discs, testing equipment insulation components
→ Excellent Flatness: Flatness ≤0.005mm, parallelism ≤0.008mm
→ Ultra-high Hardness: Vickers hardness ≥1550HV, wear resistance 10 times better than alloy steel
→ Outstanding Temperature Resistance: Continuous operating temperature -196℃～1300℃
→ Zero Permeability: Density ≥99.5%, completely airtight
→ Chemical Inertness: Resistant to acid and alkali corrosion, suitable for various chemical media
| Performance Indicator | Technical Parameter |
|---|---|
| Material Purity | Si₃N₄ ≥98% |
| Surface Finish | Ra ≤0.05μm |
| Bulk Density | 3.26 g/cm³ |
| Thickness Tolerance | ±0.002mm |
| Corner Radius | R0.5±0.05mm |
| Flatness | ≤0.005mm |
| Operating Temperature | -196℃～1300℃ |
| Flexural Strength | ≥680MPa |
Nanoscale powder pretreatment → Isostatic pressing → Vacuum sintering → Surface rough grinding → Double-sided fine grinding → Profile cutting → Corner polishing → Ultrasonic cleaning → Dimensional inspection → Vacuum packaging
Keep mounting surfaces clean during installation to avoid particle damage
Recommend using specialized installation fixtures to ensure symmetrical mounting
Preload force not exceeding 25N·m for sealing applications
Regularly inspect surface condition, recommended every 1000 operating hours
Avoid prolonged use in fluorine-containing media environments
• 18-month quality assurance
• Complimentary installation technical guidance
• Support for small-batch custom production
• Provision of material certification reports
• Lifetime free technical consultation
Q: What is the special function of the crescent design?
A: The crescent design ensures effective sealing area while providing compensation space for thermal expansion
Q: What is the dimensional accuracy of the product?
A: Thickness tolerance controlled within ±0.002mm, profile tolerance ≤0.01mm
Q: Is it suitable for ultra-high vacuum environments?
A: Outgassing rate <10⁻¹¹Pa·m³/s, particularly suitable for ultra-high vacuum applications
Q: What is the maximum processable size?
A: Currently maximum processable crescent disc structure with diameter of 200mm
Technical Innovation:
Utilizes unique symmetrical stress balance design to maintain dimensional stability during temperature changes. Special grinding processes achieve nanoscale surface roughness, ensuring perfect sealing effect. The material undergoes optimized sintering process with uniform grain size controlled within 0.8μm, maintaining high hardness while providing good fracture toughness.
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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