Introduction of Silicon Nitride Nozzles

Silicon Nitride Nozzles are high-performance ceramic nozzles made of silicon nitride (Si₃N₄) with excellent resistance to high temperatures, abrasion, and chemical stability. Silicon nitride is an advanced engineering ceramic material known for its high hardness, high strength, and thermal shock resistance. Silicon nitride nozzles are widely used in industrial applications in high temperature, high abrasion, and corrosive environments and are ideal for efficient spraying and precision machining.

Features of Silicon Nitride Nozzles

High hardness and abrasion resistance: The high hardness of silicon nitride can effectively resist abrasion 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), reducing equipment loads and suitable for high-speed injection applications.

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

Low coefficient of friction: smooth surface reduces fluid resistance and improves spraying efficiency.

Parameters of Silicon Nitride Nozzles

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
Nozzle Dimensions	Inner diameter, outer diameter, length, and nozzle shape can be customized based on application requirements
Surface Finish	Can be polished or left as-sintered depending on the application needs

Applications of Silicon Nitride Nozzles

Aerospace: for fuel injection components in high-temperature combustion chambers and propulsion systems; as a thermal protection material for equipment protection in extreme high-temperature environments.

Automotive industry: used in fuel injection system of diesel engines to improve combustion efficiency and emission performance; used as high temperature and wear resistant nozzle parts in turbocharger and exhaust system.

Metallurgical industry: used for gas or liquid injection in metal melting and casting processes; used as high-precision nozzles in continuous casting and heat treatment processes.

Chemical industry: used for spraying and atomizing corrosive media, such as spraying of acid and alkali solutions; used as corrosion-resistant nozzles in catalytic reaction and exhaust gas treatment.

Environmental protection and energy field: used for spray drying and desulfurization and denitrification process in waste gas treatment; used as a high-efficiency spraying component in the manufacturing of solar cells and fuel cells.

Additive Manufacturing (3D Printing): used as high-precision printheads for spray molding of ceramic or metal powders; provide high precision and stable spray performance in additive manufacturing technology.

Medical and laboratory equipment: Used as injection components for high-temperature laboratory equipment; used as high-temperature and corrosion-resistant nozzle components in medical equipment.

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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 Nozzles 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 Nozzles

Question 1: What are the main advantages of silicon nitride nozzles?

Answer: The main advantages of silicon nitride nozzles include their excellent wear resistance, outstanding thermal shock resistance and chemical stability. It can withstand extremely high temperatures (up to 1400°C) and maintains good mechanical strength at high temperatures. In addition, silicon nitride is highly resistant to most acid and alkali solutions and molten metals, making it ideal for use in corrosive and abrasive environments.

Question 2: What industries are silicon nitride nozzles used in?

ANSWER: Silicon nitride nozzles are used in a wide range of industries, especially where high-temperature, corrosive, or abrasive materials need to be handled. Typical applications include steel metallurgy (e.g., continuous casting nozzles), glass manufacturing (e.g., fluid hole nozzles), chemical production (e.g., reactor nozzles), ceramic processing (e.g., glaze spraying), and automotive manufacturing (e.g., engine component cooling nozzles). In addition, they are used in high-precision processing technologies such as electron beam welding and plasma cutting.

Question 3: How do silicon nitride nozzles perform in high-temperature environments?

Answer: Silicon nitride nozzles perform well in high-temperature environments, withstanding temperatures up to 1,400°C or more and maintaining their structural integrity and mechanical strength under these extreme conditions. Silicon nitride material has a low coefficient of thermal expansion and excellent resistance to thermal shock, which allows it to withstand rapid heating and cooling cycles without cracking or damage. In addition, the high melting point of silicon nitride (approximately 1900°C) ensures its stability in high-temperature applications such as continuous casting of steel, glassmaking, and other high-temperature processes. The material also exhibits good thermal conductivity, which helps to distribute heat evenly and reduces the risk of localized overheating.

Question 4: How well do silicon nitride nozzles tolerate different chemical media?

Answer: Silicon nitride nozzles are known for their excellent chemical inertness and resistance to most acid and alkali solutions and molten metals. Silicon nitride shows excellent resistance and strong corrosion resistance in acidic environments such as inorganic acids (e.g., sulfuric acid, hydrochloric acid) and organic acids, as well as in alkaline environments such as strong alkaline solutions (e.g., sodium hydroxide). In the melting process of molten metals, especially in aluminum, copper, and other non-ferrous metals, the silicon nitride nozzle will not react with the molten metal to avoid material loss and pollution. However, for some specific chemicals, such as fluoride and chloride, although silicon nitride also has some resistance, it still needs to be used with caution under long-term exposure, and additional protective measures should be considered.

Question 5: What are the energy and environmental advantages of silicon nitride nozzles?

Answer: Silicon nitride nozzles offer significant advantages in terms of energy saving and environmental protection. Improved energy efficiency: The low thermal conductivity and high heat resistance of silicon nitride materials make them ideal for use as thermal insulation. This means that the use of silicon nitride nozzles reduces heat loss and maintains higher operating temperatures without adding additional heating costs. In addition, their excellent resistance to wear reduces the frequency of replacement and lowers maintenance costs. Reduced emissions and waste: Because silicon nitride nozzles operate consistently over long periods of time, downtime due to frequent replacements or repairs is reduced. This not only improves production continuity but also reduces waste generation. At the same time, due to their excellent wear resistance and chemical stability, silicon nitride nozzles do not release hazardous substances into the environment, helping to reduce industrial emissions and meet the standards of modern green production.