Silicon nitride positioning block

Silicon nitride positioning block product introduction:

Silicon nitride (Si₃N₄) positioning blocks are high-performance structural ceramic components made of silicon nitride (Si₃N₄) material, possessing high strength, high hardness, and excellent high-temperature resistance. Manufactured using precision machining processes, these products can meet positioning requirements for various complex shapes and precision levels.

Main Characteristics

1. Mechanical Properties: Hardness of over Hv1500, bending strength exceeding 800 MPa, and fracture toughness of approximately 6-7 MPa·m¹/².

2. Thermal Properties: Low thermal expansion coefficient (approximately 3.2 × 10⁻⁶/℃), and thermal conductivity of approximately 30 W/m·K.

3. Chemical Stability: Almost no volatilization or decomposition occurs in a high vacuum environment, and the surface outgassing rate is extremely low.

4. Temperature Resistance: Can be used up to 1000℃ in air and up to 1400℃ in a protective atmosphere.

Manufacturing Process

1. Powder Preparation: High-purity silicon powder is prepared through carbothermal reduction and nitridation.

2. Forming: Dry pressing, isostatic pressing, or injection molding.

3. Sintering: Gas pressure sintering (GPS) or hot isostatic pressing (HIP) technology.

4. Precision Machining: Diamond grinding, laser processing, etc.

Product Features

1. Lighter than metal materials but with higher strength.

2. Excellent wear resistance and self-lubricating properties.

3. Good thermal shock resistance.

4. Strong chemical inertness and corrosion resistance.

Application Fields

1. Positioning components in high vacuum equipment.

2. Thermal equipment in the metallurgical industry (crucibles, burners, etc.).

3. High-temperature and wear-resistant environments in rolling mill equipment.

4. Mechanical systems requiring precise positioning.

Supports custom specifications.