Overview of Silicon Nitride Ceramic Discs
Silicon Nitride Ceramic Disc is a high-performance ceramic product. It is made of silicon nitride as the main raw material through a special process. Silicon Nitride Ceramic Disc has the advantages of high strength, high hardness, high-temperature resistance, wear resistance and corrosion resistance. At the same time, it also has good insulation properties and chemical stability. Widely used in machining, metallurgy, chemical, and electronic industries, they serve as wear-resistant components, high-temperature load-bearing parts, and insulating devices, significantly enhancing equipment performance and lifespan.
Silicon Nitride Ceramic Discs
Features of Silicon Nitride Ceramic Discs
High Strength and Hardness: With hardness second only to diamond and a few other materials, these discs excel in wear resistance. They can withstand high pressure and impact without deformation or wear, making them suitable for high-wear environments like grinding discs in machining.
Excellent High-Temperature Resistance: These discs maintain stable physical and chemical properties in high-temperature environments, withstanding temperatures up to 1600℃ without softening or melting. This makes them ideal for components in high-temperature industrial fields such as metallurgy and glass manufacturing.
Strong Chemical Stability: Highly resistant to acids, alkalis, and other chemicals, these discs maintain their integrity and performance stability in various chemical environments. They are used in the chemical industry for holding corrosive media containers or as reaction parts.
Good Insulation Properties: These discs possess excellent electrical insulation properties, effectively preventing current flow. They are used in electrical and electronic fields as insulating components to ensure safe and stable equipment operation.
Specifications of Silicon Nitride Ceramic Discs
| Item |
Unit |
Typical Values |
| Density |
g/cm³ |
3.2 - 3.254 |
| Hardness |
- |
HRA 92 - 944 |
| Vickers Hardness (HV50) |
HV 0.5 |
>15501 |
| Modulus of Elasticity |
GPa |
2901 |
| Flexural Strength |
MPa |
≥9004 |
| Compressive Strength |
MPa |
25001 |
| Fracture Toughness |
MPa·m¹/² |
6 - 84 |
| Max. Use Temperature |
℃ |
1200 - 16004 |
| Thermal Conductivity |
W/(m·K) |
15 - 2514 |
| Thermal Expansion Coefficient |
10⁻⁶/℃ |
2.95 - 3.114 |
| Thermal Shock Resistance |
ΔT℃ |
5001 |
| Specific Heat Capacity |
kJ/(kg·K) |
7001 |
| Volume Resistivity at 20℃ |
Ω·cm |
1.0×10¹² |
|
Applications of Silicon Nitride Ceramic Discs
Mechanical Field: Used as precision positioning discs and indexing discs in machining, they ensure processing accuracy, extend equipment lifespan, and improve production efficiency. They can also withstand high centrifugal forces in high-speed rotating mechanical parts.
Electronic Field: good insulating properties and thermal stability make silicon nitride ceramic disk an ideal choice for electronic packaging and substrate materials. It can effectively isolate circuits and prevent short-circuits, and at the same time, it can quickly dissipate heat to ensure that electronic components work in a stable temperature environment and improve the performance and reliability of electronic products.
Chemical Industry: Used to make stirring discs and manifolds in chemical reactors, they resist the erosion of various strong acids, alkalis, and other corrosive media, ensuring the safety and stability of the reaction process and reducing equipment maintenance costs.
Metallurgical Field: Used as inner lining plates of steel drums and diverter discs in continuous casting machines, they improve metal liquid quality, reduce impurity pollution, and prolong the lifespan of metallurgical equipment.
Company Profile
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted global chemical material supplier & manufacturer with over 12-year-experience in providing super high-quality chemicals and nanomaterials, including boride powder, nitride powder, graphite powder, ceramic products, 3D printing powder, etc.
The company has a professional technical department and Quality Supervision Department, a well-equipped laboratory, and equipped with advanced testing equipment and after-sales customer service center.
If you are looking for high-quality Ceramic Products please feel free to contact us or click on the needed products to send an inquiry.
Applications of Ceramic Products
Process of Ceramic Products
Payment Term
T/T, Western Union, Paypal, Credit Card etc.
Shipment Term
By air, by sea, by express, as customers request.
5 FAQs about Silicon Nitride Ceramic Discs
Q1: How to maintain the silicon nitride ceramic disc?
Cleaning: Use a neutral cleaner to wipe the surface, avoiding acidic and alkaline solvents that can damage the surface.
Storage: Store in a dry and ventilated environment, away from corrosive gases, to prevent long-term moisture leading to performance degradation.
Repair: Slight scratches can be polished; larger cracks need to be repaired with matching filler material; serious damage requires part replacement.
Avoid Overload: Use strictly according to design parameters to prevent mechanical stress or temperature overload.
Q2: Why is the price of silicon nitride ceramic discs higher?
Raw Material Cost: High-purity silicon nitride powder (>99.5%) is expensive.
Process Complexity: High-temperature sintering (above 1700°C) and precision machining (e.g., CNC grinding machine) are required.
Yield Limitations: Higher sintering reject rate for complex shapes.
Certification Costs: Additional testing costs are required for automotive, food contact, etc. certifications.
Cost-Effective Advantage: Although the unit price is high, the lifespan is 3-5 times that of metal parts, and the comprehensive maintenance cost is lower.
Q3: Are silicon nitride ceramic discs suitable for the food industry?
Yes, but they must comply with food safety standards:
Domestic Standards: GB 4806.4-2016 stipulates the amount of heavy metal dissolved (e.g., lead ≤ 0.5 mg/L, cadmium ≤ 0.2 mg/L).
International Standards: ISO 6486 (safety requirements for ceramic tableware), FDA 21 CFR 177 (U.S. food contact standards).
Certified Suppliers: It is recommended to choose certified suppliers, such as 3M, whose silicon nitride products meet FDA standards.
Q4: How to customize shaped silicon nitride ceramic plates?
Design Communication: Provide drawings (2D/3D) or samples to clarify dimensional tolerance (e.g., ±0.01mm) and surface roughness (Ra≤0.8μm).
Molding Process:Dry Press Molding: Suitable for simple shapes and high efficiency in mass production.Injection Molding: Preferred for complex structures (e.g., miniature parts), custom molds are required.Isostatic Pressure Molding: For large size or high precision parts, good density uniformity.Processing Verification: Ensure accuracy through CNC machining, surface polishing, and other processes, and provide test reports (e.g., hardness, density).
Q5: What is the environmental performance of silicon nitride ceramic discs?
Production: Electric heating sintering and wastewater recycling systems are adopted to reduce carbon emissions and pollution.
Recycling: Waste ceramic discs can be crushed and used as filler for refractory materials or roadbed reinforcement.
Lifecycle: Long-life design reduces replacement frequency and indirectly reduces resource consumption.
