High Quality Refractory Wear-resistant Silicon Nitride Ceramic Discs

Overview of Silicon Nitride Ceramic Disc

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. Commonly used in machining, metallurgy, chemical industry, electronics and other fields, it can be used as wear-resistant parts, high-temperature load-bearing parts, insulation devices, etc., and can effectively improve the performance and service life of the equipment.

Features of Silicon Nitride Ceramic Disc

Silicon Nitride Ceramic Disc has the following significant features:

High strength and hardness: Silicon Nitride Ceramic Discs have extremely high strength and hardness, with hardness second only to diamond and a few other substances. This makes it excellent in wear resistance, able to withstand high pressure and high impact, not easy to deform or wear and can be used in environments with high wear intensity, such as grinding disks in machining.

Good high-temperature resistance: Silicon nitride ceramic discs have excellent high-temperature resistance and can maintain stable physical and chemical properties in high-temperature environments. It can withstand high temperatures up to 1600℃ without softening or melting and still maintains good mechanical properties at high temperatures, so it is commonly used in metallurgy, glass and other high-temperature industrial fields of the relevant components.

Strong chemical stability: Silicon nitride ceramic disk has excellent chemical stability and strong corrosion resistance to acid, alkali and other chemicals. A variety of chemical environments can maintain its integrity and performance stability and can be used in the chemical industry to hold corrosive media containers or reaction parts, etc.

Good insulation: Silicon Nitride ceramic disk also has good electrical insulation properties, can effectively prevent the passage of current, and can be used in the field of electrical and electronic as an insulating component to ensure the safe operation of equipment and stability of performance.

Specifications table of Silicon Nitride Ceramic Disc

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

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Applications of Silicon Nitride Ceramic Disc

Silicon Nitride Ceramic Discs have a wide range of applications in many fields due to their excellent performance:

Mechanical field: Because of its high strength, high hardness and wear-resistant characteristics, it is often used as precision positioning discs and indexing discs in machining. It can ensure processing accuracy, extend the service life of the equipment and improve production efficiency. At the same time, in some high-speed rotating mechanical parts, silicon nitride ceramic disks can withstand high centrifugal force and stable operation.

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: With excellent chemical stability and corrosion resistance, silicon nitride ceramic discs can be used to make stirring discs and manifolds in chemical reactors. It can resist the erosion of various strong acids, alkalis and other corrosive media, ensure the safety and stability of the reaction process, and reduce equipment maintenance costs.

Metallurgical field: In the process of high-temperature metallurgy, silicon nitride ceramic disk can be used as the inner lining plate of the steel drum and the diverter disk of the continuous casting machine. Its characteristics of high temperature resistance and scouring resistance help to improve the quality of metal liquid, reduce impurity pollution, and at the same time prolong the service life of metallurgical equipment.

Company Profile

RBOSCHCO is a trusted global chemical material supplier & manufacturer with over 12 years of experience in providing super high-quality chemicals and Nanomaterials. The company exports to many countries, such as the USA, Canada, Europe, UAE, South Africa, Tanzania, Kenya, Egypt, Nigeria, Cameroon, Uganda, Turkey, Mexico, Azerbaijan, Belgium, Cyprus, Czech Republic, Brazil, Chile, Argentina, Dubai, Japan, Korea, Vietnam, Thailand, Malaysia, Indonesia, Australia, Germany, France, Italy, Portugal etc. As a leading nanotechnology development manufacturer, RBOSCHCO dominates the market. Our professional work team provides perfect solutions to help improve the efficiency of various industries, create value, and easily cope with various challenges. If you are interested, please send an email to sales1@rboschco.com

Payment Term

T/T, Western Union, Paypal, Credit Card etc.

Shipment Term

By air, by sea, by express, as customers request.

5 FAQs of Silicon Nitride Ceramic Disc

Q1: How to maintain the silicon nitride ceramic disk?

Cleaning: Use a neutral cleaner to wipe, and avoid acidic and alkaline solvents to damage the surface.

Storage: 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 replacement of parts.

Avoid overload: Use strictly according to design parameters to prevent mechanical stress or temperature overload.

Q2: Why is the price of silicon nitride ceramic disk 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 life is 3-5 times that of metal parts, and the comprehensive maintenance cost is lower.

Q3: Are silicon nitride ceramic disks suitable for the food industry?

Yes, but it needs to comply with food safety standards:

Domestic: GB 4806.4-2016 stipulates the amount of heavy metal dissolved (e.g. lead ≤ 0.5 mg/L, cadmium ≤ 0.2 mg/L).

International: ISO 6486 (safety requirements for ceramic tableware), FDA 21 CFR 177 (U.S. food contact standards).

It is recommended to choose certified suppliers, e.g., 3M’s 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 the dimensional tolerance (e.g., ±0.01mm) and surface roughness (Ra≤0.8μm).

Molding process:

Dry press molding: suitable for simple shapes, high efficiency in mass production.

Injection molding: preferred for complex structures (e.g., miniature parts), custom molds required.

Isostatic pressure molding: 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 disk?

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.