Introduction of Silicon Nitride Rods

Silicon Nitride Rods are high-performance ceramic rods made from silicon nitride (Si₃N₄) with excellent resistance to heat, wear, and chemical stability. Silicon nitride is an advanced engineering ceramic material known for its high hardness, high strength, and thermal shock resistance. Widely used in high-temperature, corrosive, and high-wear industrial applications, silicon nitride rods are efficient, durable, and reliable engineering components.

Features of Silicon Nitride Rods

High hardness and wear resistance: the high hardness of silicon nitride can effectively resist wear and prolong service life.

Excellent high-temperature resistance: able to work stably in high-temperature environments above 1200°C.

Thermal shock resistance: able to withstand rapid temperature changes and suitable for frequent heating and cooling conditions.

Chemical stability: extremely resistant to acids, alkalis, and most molten metals.

Low density: low density (about 3.2 g/cm³) reduces equipment loads and is suitable for high-speed rotary applications.

High mechanical strength: high flexural strength and fracture toughness, able to withstand large mechanical stresses.

Electrical insulation: maintains good electrical insulation properties at high temperatures, suitable for electronic and electrical applications.

Low thermal conductivity: good thermal insulation properties, reducing heat loss and improving energy efficiency.

Parameters of Silicon Nitride Rods

Property	Specification
Material Composition	Si₃N₄ (Silicon Nitride)
Density	~3.20 g/cm³
Hardness (Vickers)	~1500-1800 HV
Fracture Toughness	~6-7 MPa·m½
Young’s Modulus (Elastic Modulus)	~280-320 GPa
Compressive Strength	~3000-4000 MPa
Flexural Strength (Bending Strength)	~800-1000 MPa
Coefficient of Thermal Expansion	~3.2 × 10⁻⁶ /°C (at room temperature to 1000°C)
Thermal Conductivity	~25-35 W/m·K
Max Service Temperature in Air	Up to 1200°C (continuous), up to 1400°C (intermittent)
Chemical Resistance	Excellent resistance to acids, alkalis, and molten metals
Electrical Resistivity	High (>10¹² Ω·cm at room temperature)
Wear Resistance	Excellent, suitable for high-wear applications
Thermal Shock Resistance	Outstanding, capable of withstanding rapid temperature changes
Corrosion Resistance	Superior, especially in aggressive environments
Self-Lubricating Properties	Reduces friction in moving parts
Biocompatibility	Suitable for medical applications
Environmental Impact	Environmentally friendly, no harmful substances

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Applications of Silicon Nitride Rods

High-temperature industry: heating elements, support rods and thermocouple protection tubes for high-temperature furnaces; in aerospace, structural components and thermal protection materials for high-temperature environments.

Electronics and semiconductor industry: as support rods or guides in high-temperature furnaces for melting and crystal growth of semiconductor materials; in the manufacture of electronic components for high-temperature sintering and heat treatment processes.

Machinery and tools industry: used as wear-resistant parts of high-precision machinery and equipment, such as bearings, guide rails, and cutting tools; used as wear-resistant guide rods and guide rollers in the textile and paper industries.

Chemical industry: for stirring rods, support rods, and reactor linings in corrosive media, as well as corrosion-resistant structural components in catalytic reactions and exhaust gas treatment.

Medical and laboratory equipment: support rods and reaction rods for high-temperature experimental equipment; in medical equipment, as high-temperature and corrosion-resistant components, such as dental tools and surgical instruments.

Energy and environmental protection: electrolyte support rods used in solid oxide fuel cells (SOFC) as high-temperature resistant structural components in solar and nuclear energy equipment.

Additive manufacturing (3D printing): as high-precision printheads for jet molding of ceramic or metal powders; to provide high-precision and stable jetting performance in additive technologies.

Company Profile

RBOSCHCO is a trusted global chemical material supplier & manufacturer with over 12 years experience in providing super high-quality chemicals and Nanomaterials.

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 Silicon Nitride Rods please feel free to contact us or click on the needed products to send an inquiry. 

Payment Term

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

Packing and Storage

The product is in powder form and should be stored in a cool, ventilated place. Avoid inhalation when using it and keep away from open flames, heat sources, etc.

Shipment Term

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

FAQs of Silicon Nitride Rods

Question 1: What are the main application areas for silicon nitride rods?

Answer: Due to its excellent physical and chemical properties, silicon nitride rods are widely used in the following fields: Mechanical engineering: used as bearing balls, rollers, and other rotating parts, especially suitable for high temperature and high-speed operation environment; Automotive industry: used as engine turbocharger rotors, exhaust valves and other key components, able to withstand high temperature and corrosion; Aerospace: used in the manufacture of jet engine combustion chambers, turbine blades and so on, these components need to maintain stable performance under extreme temperatures. These components need to maintain stable performance at extreme temperatures; chemical industry: as pump and valve components, able to resist the erosion of various chemical media to ensure long-term reliable operation; electronics and semiconductor manufacturing: used to manufacture high-precision machining tools and support structures, such as components in wafer processing equipment.

Question 2: What are the advantages of silicon nitride rods over conventional metal rods?

Answer: Silicon nitride rods have several significant advantages over traditional metal rods: higher hardness and wear resistance; the silicon nitride material itself is extremely hard, far exceeding most metals, making it more durable in wear conditions; lower density: compared with metals such as steel, silicon nitride is less dense, which helps to reduce weight, which is especially important for application scenarios that require lightweight; better heat resistance: Able to maintain stable performance at higher temperatures, suitable for extreme temperature environments up to 1400°C or even higher; excellent corrosion resistance: virtually unaffected by most chemicals, especially suitable for use in corrosive environments; good self-lubricating properties: reduced coefficient of friction, improved operating efficiency and reduced maintenance costs.

QUESTION 3: Why are silicon nitride rods suitable for use in the electronics and semiconductor industries?

Answer: Silicon nitride rods are suitable for use in the electronics and semiconductor industries for the following reasons: high-temperature resistance: able to work stably in the high-temperature environment of semiconductor material melting and crystal growth; chemical stability: extremely corrosion-resistant to chemicals used in the semiconductor manufacturing process; high precision: used as a support rod or guideway, it ensures high-precision processing of semiconductor materials; electrical insulation: maintains good electrical insulation properties at high temperatures; good self-lubricating properties: reduces operating efficiency and maintenance. Maintain good electrical insulation properties that are suitable for the manufacture of electronic components.

Question 4: What is the role of silicon nitride rods in the machinery and tooling industry?

Answer: In the machinery and tools industry, silicon nitride rods are mainly used in the following aspects: wear-resistant parts: used in bearings, guide rails, and cutting tools of high-precision machinery and equipment to prolong their service life; guide rods and guide rollers: used as wear-resistant guide rods and guide rollers in the textile and paper industry to improve productivity; high-speed rotating equipment: used as support rods for high-speed rotating equipment to reduce friction and wear.

QUESTION 5: Silicon nitride rods are more costly; what factors affect their price?

Answer: The relatively high cost of silicon nitride rods is mainly affected by the following factors: raw material costs: high-quality silicon nitride powder itself is expensive, especially for special silicon nitride containing rare element additives; complex production process: the entire production process from powder preparation to the final product requires high-precision equipment and technical support, which increases the cost of manufacturing; high energy consumption: high-temperature sintering process Energy consumption is huge, especially for the special sintering method used to obtain high-performance products; Scrap rate: due to the brittle nature of silicon nitride material, it is prone to breakage during production and processing, resulting in a high scrap rate, which indirectly pushes up the cost; Market demand: although the application of silicon nitride rods is widespread, the overall market capacity is limited, and the lack of scale effect also limits the space for cost reduction; Customized demand: if the customers have special size or shape requirements, it may add extra processing time and cost, thus further raising the price.