Corrosion Resistant Si3N4 Substrate Chemical Resistant Silicon Nitride Ceramic Substrate Sintered
Si3N4 Silicon Nitride Ceramic Support Substrate Washer For High‑Heat Equipment
Silicon Nitride (Si₃N₄) Ceramic Substrate Washer / Support Shim
Silicon nitride ceramic substrate washers are precision‑machined from high‑density gas‑pressure‑sintered silicon nitride. Mainly applied as supporting substrate, insulating spacer and buffer shim for high‑temperature equipment. Balances high strength, thermal stability and insulation performance, outperforming metal, alumina and zirconia components under extreme working conditions.
Si3N4 Ceramic Parts are a man made compound synthesized through several different chemical reaction methods. they are pressed and sintered by well developed methods to produce a ceramic with a unique set of outstanding properties. The material is dark gray to black in color and can be polished to a very smooth reflective surface, giving parts with a striking appearance.
■ Excellent high‑temperature stability
Continuous operating temperature up to 1200°C. Good thermal shock resistance, stable dimension under rapid temperature cycling, no softening or deformation.
■ Superior wear‑resistance & low friction
High surface hardness with inherent self‑lubricating property. Greatly reduce friction loss during continuous rotation and repeated compression, extend component service life.
■ Outstanding corrosion resistance
Resist most acids, alkalis and molten metal erosion. Will not contaminate high‑purity production systems.
■ Low thermal expansion & high dimensional accuracy
Low coefficient of thermal expansion. Maintain stable spacing and preload under temperature change. Precision machined for tight tolerance requirements.
■ High toughness & lightweight
Higher fracture toughness than common oxide ceramics, lower risk of brittle chipping. Lower density than steel for weight reduction.
Main Applications:
High‑temperature furnace assemblies, mechanical rotating equipment, semiconductor fixtures, molten metal processing, new‑energy equipment, chemical corrosion‑resistant assemblies, bolt & shaft anti‑wear spacing parts.
Silicon Nitride Material Sheet
| Properties | Units | Silicone Nitride | |
| Mechanical | Density | gm/cc | 3.2 |
| Porosity | % | 0 | |
| Flexural Strength | Mpa | 830 | |
| Compressive Strength | Mpa | 2500 | |
| Elastic Modulus | Gpa | 310 | |
| Poisson's Ratio | / | 0.27 | |
| Hardness | kg/mm2 | 1580 | |
| Fracture Toughness KIC | Mpa *m 1/2 | 6.1 | |
| Thermal | Heat Conductivity | W/ m*k | 30 |
| Coefficient of Thermal Expansion | 10⁻⁶/K | 3.3 | |
| Specific Heat | j/kg*K | / | |
| Thermal Shock Resistance | °C | / | |
| Max UseTemperature | °C | 1400 | |
| Electrical | Dielectric Strength | ac-kv/mm | / |
| Dielectric Constant | / | 8 | |
| Loss Tangent | / | / | |
| Volume Resistivity | ohm•cm | >1014 | |
Features:
● High Hardness
Silicon nitride exhibits extremely high hardness, making it suitable for fields such as wear-resistant and cutting tools.
● Excellent Wear Resistance
Silicon nitride ceramic exhibits outstanding wear resistance, making it suitable for applications in high-wear environments.
● Superior Insulating Performance
Silicon nitride ceramic possesses excellent electrical insulation properties and chemical stability, making it widely used in the electronics and semiconductor industries.
● High Temperature Stability
It can maintain stability in high-temperature environments, making it suitable for applications like high-temperature heaters and furnaces.
Applications:
Rotating ball bearings and rollers bearings
Cutting tools
Engine components: valves, rocker arm pads, seal faces
Induction heating coil supports
Turbine blades, vanes, buckets
Welding and brazing jigs
Heating element components
Crucibles
Metal tube forming rolls and dies
TIG / Plasma welding nozzles
Weld positioners
Precision shafts and axles in high-wear environments
Thermocouple sheaths and tubes
Semiconductor process equipment
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