Product Specification

Silicon Nitride Ceramic Special-Shaped Part: Precision Solution for High-End Equipment

At the boundary of precision machinery and industrial technology, silicon nitride ceramic special-shaped parts are quietly pushing the performance limits across multiple fields.

In the realm of high-end manufacturing, materials science often presents bottlenecks for technological breakthroughs. Silicon nitride ceramic, regarded as the "jewel in the crown of structural ceramics," has become an indispensable material for precision equipment due to its unique combination of properties.

This gray-black matte-finish silicon nitride ceramic special-shaped part is specifically designed for demanding industrial environments. It combines an irregular shape with a precision structure to meet the stringent requirements of high-end equipment for high temperature resistance, wear resistance, and non-magnetic properties.

01 Product Overview

This product is made from high-performance silicon nitride ceramic, presenting a uniform gray-black matte appearance. The material is dense and non-porous, ensuring uniformity and stability in physical performance.

The product features an irregular special-shaped design, skillfully integrating a square ring-shaped grip section with a slender rod-shaped operation section. The rod end includes a special slot structure.

With smooth flowing lines and all edges featuring rounded transition treatment, the design enhances tactile comfort while avoiding stress concentration, thereby extending the product's service life.

This precision structural design enables adaptation to complex working environments, meeting the precise operation requirements of high-end equipment.

02 Primary Applications

This silicon nitride ceramic special-shaped part plays a significant role in multiple high-end fields:

• Optical Instruments: Serves as precision positioning components, ensuring stability and accuracy of optical systems

• Semiconductor Manufacturing: Used in wafer handling systems for grasping devices, preventing microscopic particle contamination

• Precision Machinery Industry: Applied in adjustment or locking mechanisms of high-precision machine tools and automated equipment

• Aerospace: Suitable for high-temperature, high-strength environments such as engines and transmission systems

• Automotive Industry: Used in specialized equipment requiring high temperature and wear resistance

03 Product Advantages

The silicon nitride ceramic special-shaped part offers multiple exceptional advantages through its material properties:

• High Temperature Resistance: Withstands temperatures up to 1000°C in air and 1400°C in protective atmospheres, maintaining dimensional stability at elevated temperatures

• Exceptional Mechanical Properties: High hardness (HV10 up to 1480), flexural strength exceeding 900MPa, fracture toughness ≥6 MPa·m⁻¹/²

• Wear and Corrosion Resistance: Exhibits good inertness to most chemicals, with wear resistance approaching diamond

• Low Thermal Expansion Coefficient: 2.6-3.1×10⁻⁶/K (40-400°C to 40-800°C), ensuring dimensional stability during temperature variations

• Non-Magnetic and Insulating Properties: Volume resistivity >10¹⁴ Ω·cm, breakdown voltage >15 kV/mm, suitable for electromagnetically sensitive environments

04 Specifications Parameter Table

05 Manufacturing Process

The production of silicon nitride ceramic special-shaped parts combines precision craftsmanship with strict quality control:

• Powder Preparation: Silicon powder undergoes nitridation reaction in a nitrogen atmosphere at high temperatures (approximately 1200-1300°C) to generate silicon nitride powder, with strict control of impurities such as Fe, O, and Ca below 2%

• Forming Process: Cold Isostatic Pressing technology ensures uniform billet density

• Sintering Process: Application of gas pressure sintering at 5-12MPa nitrogen pressure and 1800-2100°C conditions inhibits silicon nitride decomposition and promotes material densification

• Precision Machining: Post-processing via specialized precision machine tools ensures dimensional accuracy

• Surface Treatment: Final matte treatment creates a uniform, consistent surface texture

06 Usage Instructions

To ensure lasting and stable product performance, please follow these guidelines:

• Installation Requirements: Use heating fit method for installation, transforming tight fits into loose fits by utilizing thermal expansion through heating the ceramic or mating parts

• Operating Environment: Recommended for use within room temperature to 1000°C (in air) or 1400°C (in protective atmosphere)

• Cleaning Methods: Handle with care, avoiding surface scratches during cleaning to prevent slipping marks and contamination

• Storage Conditions: Store separately by variety, specification, and grade in warehouses or sheds, avoiding humid environments

07 After-Sales Service

We provide comprehensive customer support:

• Quality Assurance: Clear information on safe usage period and manufacturing date

• Professional Consultation: Professional technical consultation services to address application questions

• Customization Services: Custom products available according to specific customer requirements

08 Frequently Asked Questions

Q1: What is the primary failure mode of silicon nitride ceramic special-shaped parts?
A: The main failure mode is fracture under extreme loads, with crushing load ratio ≥40%, ensuring operation within safe limits

Q2: What are the standout advantages of silicon nitride compared to other ceramic materials?
A: Silicon nitride combines high strength, high toughness, and good thermal stability, with fracture toughness up to 6.5 MPa·√m, significantly higher than alumina and aluminum nitride

Q3: Can this product be used in strong acid and alkali environments?
A: Silicon nitride is unaffected by dilute acids, but concentrated strong alkali solutions slowly corrode silicon nitride, while molten strong alkalis rapidly convert it to silicate and ammonia

Q4: How is product dimensional accuracy ensured?
A: Through precision machine tool processing and strict sintering control, ensuring product dimensional precision and consistency