High-Strength Silicon Nitride Ceramic Block with Breakdown Voltage 20-25 KV/mm

Product Specification

High-Strength Silicon Nitride Ceramic Gray-Black Perforated Rectangular Block

Product Introduction

This product utilizes high-performance reaction sintered silicon nitride ceramic material, featuring a distinctive gray-black appearance and a dense, uniform microstructure. The product adopts a rectangular block design with a central circular hole, with all edges precisely chamfered and the surface achieving a mirror-level finish of Ra 0.2µm. The central hole maintains extremely high coaxiality with the external shape, and the inner wall is smooth and flat, ensuring no stress concentration occurs during use.

Core Advantages

• Exceptional Mechanical Properties: Flexural strength ≥650 MPa, hardness reaching HRA 92-94

• Outstanding Thermal Stability: Coefficient of thermal expansion 3.2×10⁻⁶/°C, capable of long-term operation at 1400°C

• Excellent Wear Resistance: Wear coefficient below 0.5, service life over 10 times that of traditional metal materials

• Good Insulation Properties: Volume resistivity >10¹⁴ Ω·cm, dielectric strength >15 kV/mm

• Comprehensive Corrosion Resistance: Resists corrosion from most acids, alkalis, and salt solutions (except hydrofluoric acid)

Primary Applications

• Semiconductor manufacturing equipment: Wafer carrier platforms, insulating fixtures, vacuum chuck components

• High-temperature processing equipment: Sintering furnace load-bearing plates, heat treatment fixtures, high-temperature guides

• Precision machinery: Linear guide sliders, high-precision measurement platforms, automation equipment positioning blocks

• Power electronics: High-voltage insulating pillars, heat dissipation substrates, power module support components

• Chemical equipment: Corrosion-resistant bearing seats, pump and valve components, reactor liner plates

Specifications Table

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

1. Use specialized installation tools to ensure even force distribution during installation.

2. When mating with metal components, recommend reserving a 0.1-0.2mm thermal expansion gap.

3. Avoid contact with hydrofluoric acid; use temperature in strong alkaline environments should not exceed 200°C.

4. Regularly inspect the surface condition; replace immediately if cracks are found.

5. The storage environment should remain dry with relative humidity ≤60%.

After-Sales Service

• 12-month quality assurance period

• Complimentary technical consultation and selection guidance

• Support for small-batch custom development (minimum order quantity 100 pieces)

• Provision of complete product test reports and material certificates

• Rapid response to customer needs, providing solutions within 24 hours

FAQ

Q: What are the advantages of this product compared to alumina ceramic?
A: Silicon nitride ceramic significantly outperforms alumina ceramic in toughness, thermal shock stability, and wear resistance. Its fracture toughness is more than twice that of alumina, resulting in a longer service life.

Q: Can different sizes be customized according to needs?
A: Customization services are supported. Personalized customization can be provided based on drawings or samples, with minimum machining tolerances reaching ±0.01mm.

Q: What is the delivery time for the product?
A: Standard specification products: 3-5 working days. Custom products: 7-15 working days depending on complexity.