Tubular ceramic

silicon nitrideinsulation

The Silicon Nitride Ceramic Coil Core is designed as a coil support for sensor coils, leveraging the ultra-high hardness and nonmagnetic insulation properties of silicon nitride ceramics. This product is essential for applications where insulation and nonmagnetic characteristics are required to ensure accurate data transmission, especially in complex underground environments where sensor protection is critical. The silicon nitride support offers protection against corrosion, extreme temperatures, and thermal expansion, making it suitable for harsh conditions.

Applications

• Induction ceramic coil of induction instrument in practical oil well logging instruments
• Core component in medical imaging equipment, such as magnetic resonance imaging (MRI) systems, where gradient coil stents are used

Material Properties (Silicon Nitride Ceramic)

• Density: 3.2±0.05 g/cm3
• Relative density: >99.5%
• Elastic Modulus: 300~320 GPa
• Crushing Load Ratio (25℃): ≥40%
• Hardness: 91 (HRA)
• Fracture Toughness: 6.0~7.0 MPa·m1/2
• Flexural Strength: 600~700 MPa
• Poisson’s Ratio: 0.25
• Coefficient of Thermal Expansion: 2.3~3.2 x10-6 /K
• Weibo Modulus: 10~12 GPa
• Thermal Conductivity: 15~20
• Resistivity: 1018 W/(m·K)
• Acid and Alkali Corrosion Resistance: Excellent
• Dimensional Stability: Excellent
• Magnetism: None
• Oxide Content: 8%

Benefits

• High strength over a large temperature range
• High fracture toughness
• Good flexural strength
• Mechanical fatigue and creep resistance
• Lightweight – Low density
• High hardness and wear resistance (impingement and frictional modes)
• Superior thermal shock resistance
• Low thermal expansion
• Electrical insulator
• Good oxidation resistance
• Good chemical corrosion resistance
• Wear-resistant

Characteristics / Technical Specifications

• Material: Silicon Nitride (Si3N4) Ceramic
• Nonmagnetic and electrically insulating
• High hardness and mechanical strength
• Excellent resistance to corrosion and thermal shock
• Low coefficient of thermal expansion
• Suitable for use in oil well logging, geological exploration, and medical imaging equipment