Silicon Nitride Ceramic Disc With Concentric Ring Texture For Optimal Performanc

Product Specification

Silicon Nitride Ceramic Disc With Concentric Ring Texture For Optimal Performance In High-Temperature Applications

Product Overview
This product is a dome-shaped disc component precision-engineered from high-performance silicon nitride (Si₃N₄) ceramic. It exhibits the characteristic dark gray-black color of the material and features a functional, finely machined concentric ring texture on its surface, with a small central hole at the top. The smooth, streamlined contour is not only aesthetically pleasing but also optimized for fluid dynamics and stress distribution. This component integrates the exceptional strength, outstanding thermal shock resistance, superior wear resistance, and excellent corrosion resistance of silicon nitride, making it a highly reliable industrial element designed for extreme operating conditions.

Primary Applications
Leveraging its comprehensive performance advantages, this component is widely used in demanding fields:

• Mechanical Seal Rings: Serves as a high-end seal ring for rotating shafts in pumps, compressors, and reactors, significantly outperforming metal materials, especially in corrosive and high-temperature environments.

• High-Speed Bearing Balls & Rollers: Used in all-ceramic or hybrid ceramic bearings for aerospace, high-speed machine tools, and other applications, offering lightweight, high-speed capability, and long service life.

• High-Temperature Structural Components: Acts as supports, rollers, or insulating parts within high-temperature furnaces in metallurgical and semiconductor industries, capable of long-term stable operation above 1200°C.

• Wear-Resistant Liners & Nozzles: Functions as wear-resistant liners, wetted parts in slurry pumps, or sandblasting nozzles in harsh environments, demonstrating exceptionally long service life.

Key Advantages

• Excellent Combined Mechanical Properties: Offers a unique combination of ultra-high hardness (HRA ≥92), high flexural strength, and excellent fracture toughness, providing strong resistance to mechanical shock.

• Superior Thermal Shock Resistance: Low coefficient of thermal expansion and good thermal conductivity enable it to withstand severe thermal cycling without cracking, offering thermal stability far exceeding most engineering materials.

• Outstanding Wear & Corrosion Resistance: Provides exceptional abrasion resistance and withstands most acids and alkalis, suitable for a wide range of operating conditions.

• Lightweight & Self-Lubricating: Density is only about 40% of steel, enabling lightweight design; low friction coefficient ensures smoother operation.

• Insulating & Non-Magnetic: An excellent electrical insulator and non-magnetic, suitable for special electromagnetic environments.

Specifications Table

Manufacturing Process
Raw material preparation (High-purity α-Si₃N₄ powder & sintering aids) → Uniform mixing → Forming (Dry pressing / Cold Isostatic Pressing) → Green body machining → High-temperature sintering (Hot Pressing or Gas Pressure Sintering) → Precision diamond grinding → Centerless grinding (external diameter) → Laser drilling / Precision drilling → Surface grinding & polishing (or texture machining) → Full performance testing → Packaging.

Usage Instructions

1. Precise Alignment & Installation: When used as a seal or bearing component, ensure precise alignment with mating parts to avoid damage from localized stress due to misalignment.

2. Avoid Stress Concentration: Apply force evenly during installation. Avoid point impact or striking. Use non-metallic tools for assembly.

3. Operating Condition Suitability: Although it offers excellent corrosion resistance, carefully evaluate its suitability for environments involving molten metals or specific highly corrosive chemicals.

After-Sales Service
We provide a 12-month product quality warranty, backed by professional technical support and custom services. Components can be manufactured according to customer drawings to ensure perfect application fit.

Frequently Asked Questions (FAQ)

• Q: What are the main advantages of Silicon Nitride (Si₃N₄) compared to Silicon Carbide (SiC) ceramic?

  • A: The primary advantages are its superior fracture toughness and exceptional thermal shock resistance. Silicon nitride offers better impact resistance and withstands thermal cycling more effectively. Silicon carbide has higher hardness and thermal conductivity but is more brittle. Silicon nitride is often the preferred choice for dynamically loaded components like bearings and seal rings.

• Q: What is the function of the concentric ring texture on the surface?

  • A: This texture is typically used on the face of seal rings. It helps form a stable hydrodynamic fluid film, improves lubrication, and carries away frictional heat and fine particles, thereby enhancing sealing performance and service life.

• Q: Can this disc be manufactured in other shapes or colors?

  • A: Shapes are highly customizable. We can produce square, complex-shaped, and other structural components based on your drawings. However, the color is typically the inherent dark gray-black of the material and cannot be altered.