High precision and high quality wear-resistant silicon nitride needles

Overview of Silicon Nitride Needles

Silicon Nitride Needles are needle-like objects made of silicon nitride (Si₃N₄) as the main material. It has the advantages of high strength, high hardness, high-temperature resistance, wear resistance and good chemical stability. Silicon Nitride Needles are widely used in machining, electronic industry, aerospace and other fields, as high-precision machining tools, pins of electronic components or special structural components, etc., to meet the requirements of a variety of complex working conditions.

Features of Silicon Nitride Needles

Silicon Nitride Needles have a series of excellent features:

High Strength and Hardness: Silicon Nitride Needles have a stable crystal structure, which gives them excellent strength and hardness. It can withstand large external forces without deformation. In industrial production, it can be used to process materials with high hardness, such as in metal cutting and drilling, etc. It can maintain good abrasion resistance and sharpness and prolong its service life.

High-temperature resistance: Silicon nitride needles have good high-temperature resistance and can maintain stable physical and chemical properties in a high-temperature environment. It can withstand high temperatures without softening or melting, which makes it widely used in aerospace, metallurgy and other high-temperature fields; for example, as a high-temperature part of the aviation engine, it can work normally in a high-temperature gas environment.

Good chemical stability: Silicon nitride has strong resistance to acid, alkali and other chemicals, and it is not easy to be corroded. In some harsh chemical environments, such as the chemical production of corrosive media processing, as well as the electronic industry in the etching process etc., silicon nitride needles can maintain stable performance to ensure the accuracy and reliability of the production process.

Good insulation: silicon nitride needles are an excellent insulating material with high resistivity and low dielectric constant. In the electrical and electronic field, it can be used to manufacture insulating parts, such as pins in integrated circuits, insulating brackets, etc., which can effectively prevent current leakage and short-circuiting and guarantee the normal operation of electronic equipment.

Specifications Table of Silicon Nitride Needles

Property	Typical Value
Material	Silicon nitride (Si₃N₄)
Density	3.1 – 3.3 g/cm³3
Hardness	Vickers hardness (HV1) is about 16 GPa2
Flexural strength	780 – 980 MPa (room temperature), and can still maintain more than 80% of the strength at 1200℃
Fracture toughness	6.5 MPa·m¹/²2
Young’s modulus	320 GPa2
Poisson’s ratio	0.282
Thermal expansion coefficient	2 – 3.5×10⁻⁶/K (20 – 1000℃)2
Thermal conductivity	28 W/(m·K) at 20℃, 16 W/(m·K) at 1000℃2
Maximum operating temperature	1000℃ in air, 1400℃ in protective atmosphere3
Electrical resistivity	10¹² Ω·cm at 20℃, 10⁷ Ω·cm at 800℃2
Dielectric constant	6 (1 MHz)

Play

Applications of Silicon Nitride Needles

Silicon Nitride Needles have important applications in many fields due to their unique properties:

Machining field: Due to its high hardness and good wear resistance, Silicon Nitride Needles can be made into cutting tools for machining. It can cut all kinds of metal materials at high speed, improve processing efficiency and precision, and reduce tool wear, especially suitable for processing hard-to-machine materials such as high-hardness alloys. At the same time, in mold manufacturing, silicon nitride needles can be used as ejector pins and other components to withstand high temperatures and high pressure to ensure the normal opening and closing of the mold and the smooth release of products.

Electronic industry: The good insulating properties of silicon nitride needles make them ideal materials for the pins of electronic components, ensuring the accurate transmission of electronic signals and preventing leakage and short-circuit problems. In addition, in the photolithography process of semiconductor manufacturing, silicon nitride needles can be used as high-precision positioning and support components to ensure the accuracy and stability of photolithography, which helps to improve the yield rate of chip manufacturing.

Aerospace field: high-temperature parts of aviation engines, such as turbine blades, can be manufactured with composite materials reinforced with silicon nitride needles. It can maintain good mechanical properties in a high-temperature, high-pressure gas environment, reduce the weight of the engine, improve fuel efficiency, and thus enhance the overall performance of the aircraft. In addition, in the connection parts of structural components in aerospace, silicon nitride needles can be used as high-strength, high-temperature-resistant connectors to ensure the reliability of the structure.

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 Needles

Q1: What are the advantages and disadvantages of silicon nitride needles?

Advantages: Combination of high strength (flexural strength of 1000MPa or more), high toughness (fracture toughness of 5-6MPa・m¹/²) and low coefficient of thermal expansion (2.8-3.2×10-⁶/°C), can withstand extreme working conditions. Disadvantages: brittle, easily chipped by impact, and difficult to process, precision machining costs are 3-5 times that of ordinary metals.

Q2: How to maintain and extend the life of Silicon Nitride needles?

Avoid severe impacts during use to prevent micro-cracks on the surface; control the oxidation rate in high-temperature environments and avoid prolonged exposure to air above 1400°C; check the surface wear regularly, and form a silicon carbide coating on the surface by chemical vapor deposition (CVD) to enhance hardness and wear resistance.

Q3: What is the difference between silicon nitride needles and tungsten carbide needles?

Tungsten carbide is harder (9.8 on the Mohs scale) but more brittle and less resistant to high temperatures (oxidation increases above 800°C). Silicon nitride needles retain their strength at 1200°C and are suitable for high-temperature, high-speed cutting, while tungsten carbide is more suitable for machining super-hard materials at room temperature.

Q4:Do silicon nitride needles have environmental advantages?

The production process is energy-intensive, but the material itself is non-toxic and can be recycled after disposal. In the medical field, silicon nitride implants do not need to be removed by a second surgery, which reduces patients’ pain.

Q5:What are the latest trends in silicon nitride needles?

In 2025, silicon nitride welding needles are rapidly gaining popularity in the automotive and aerospace sectors for welding batteries in new energy vehicles and connecting lightweight structural parts in aircraft. In addition, nano-silicon nitride coating technology is being developed to enhance their surface hardness and corrosion resistance further.