High-Strength Silicon Nitride Ceramic Block with Breakdown Voltage 20-25 KV/mm Size Range 0.5mm-100mm and Highest Melting Point 1900℃
Price:
as negotiated and agreed
MOQ:
as negotiated and agreed
Delivery Time:
depend on the actual product
Brand:
Dayoo
Product Description
High-Strength Silicon Nitride Ceramic Gray-Black Perforated Rectangular Block
Product Introduction
This high-performance ceramic block utilizes reaction sintered silicon nitride material, featuring a distinctive gray-black appearance with dense, uniform microstructure. Designed as a rectangular block with central circular hole, all edges are precisely chamfered with mirror-level surface finish (Ra 0.2µm). The central hole maintains exceptional coaxiality with external dimensions, featuring smooth inner walls to prevent stress concentration during operation.
Core Advantages
- Exceptional Mechanical Properties: Flexural strength ≥650 MPa, hardness HRA 92-94
- Outstanding Thermal Stability: Coefficient of thermal expansion 3.2×10⁻⁶/°C, operational up to 1400°C
- Superior Wear Resistance: Wear coefficient below 0.5, 10x lifespan of traditional metals
- Excellent Insulation: Volume resistivity >10¹⁴ Ω*cm, dielectric strength >15 kV/mm
- Comprehensive Corrosion Resistance: Withstands most acids, alkalis, and salt solutions (except hydrofluoric acid)
Primary Applications
- Semiconductor manufacturing: Wafer carriers, insulating fixtures, vacuum chuck components
- High-temperature processing: Sintering furnace plates, heat treatment fixtures, high-temperature guides
- Precision machinery: Linear guide sliders, measurement platforms, automation positioning blocks
- Power electronics: High-voltage insulators, heat dissipation substrates, power module supports
- Chemical equipment: Corrosion-resistant bearings, pump/valve components, reactor liners
Technical Specifications
| Parameter | Technical Specifications |
|---|---|
| Primary Material | Reaction Sintered Silicon Nitride |
| Color | Gray-Black |
| Bulk Density | 3.20±0.05 g/cm³ |
| Flexural Strength | 650-750 MPa |
| Fracture Toughness | 6.5-7.5 MPa*m¹/² |
| Maximum Service Temperature | 1400°C (inert atmosphere) |
| Thermal Conductivity | 25-30 W/(m*K) |
| Surface Roughness | Ra ≤ 0.2 µm |
Manufacturing Process
High-purity silicon powder preparation → Isostatic pressing → Pre-machining → Reaction sintering → Precision grinding → Laser marking → Ultrasonic cleaning → Performance testing → Vacuum packaging
Usage Instructions
- Use specialized installation tools for even force distribution
- Maintain 0.1-0.2mm thermal expansion gap when mating with metal components
- Avoid hydrofluoric acid; limit to 200°C in strong alkaline environments
- Regularly inspect surface condition; replace immediately if cracks appear
- Store in dry conditions (relative humidity ≤60%)
After-Sales Service
- 12-month quality guarantee
- Complimentary technical consultation and selection guidance
- Small-batch custom development (MOQ 100 pieces)
- Complete product test reports and material certificates
- 24-hour response for customer solutions
Frequently Asked Questions
Q: What are the advantages compared to alumina ceramic?
A: Silicon nitride ceramic significantly outperforms alumina in toughness, thermal shock stability, and wear resistance, with fracture toughness more than double that of alumina for extended service life.
Q: Can different sizes be customized?
A: Customization services are available based on drawings or samples, with machining tolerances reaching ±0.01mm.
Q: What is the delivery time?
A: Standard products: 3-5 working days. Custom products: 7-15 working days depending on complexity.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Dayoo Advanced Ceramic Co.,Ltd
Location
No. 6, Shuangjin Street, Qiubin Industrial City, Qiubin Street, Wucheng District, Jinhua, Zhejiang
Contact Person
Lu