High Precision Silicon Nitride Ceramic Beads

Overview of Silicon Nitride Beads

Silicon Nitride Beads are a kind of ceramic material with unique properties. With silicon nitride as the main component, it is characterized by high strength, high hardness, high-temperature resistance, wear resistance, oxidation resistance and good chemical stability. These characteristics make Silicon Nitride Beads have a wide range of applications in machinery, chemical industry, electronics and many other fields, such as grinding media, rolling bearing balls, etc., which can effectively improve the performance and service life of related equipment.

Features of Silicon Nitride Beads

Silicon Nitride Beads have the following significant features:

High strength and hardness: Silicon Nitride Beads have a stable crystal structure, which gives them excellent strength and hardness. It can withstand large pressure and impact without deformation or rupture and performs excellently in the fields of wear-resistant parts, machining, etc. For example, when it is used as a grinding medium, it can grind the material efficiently and has low loss itself.

Good performance in high-temperature resistance: Silicon nitride beads can maintain good performance in high-temperature environments. Its melting point is as high as about 1900 ℃; it can withstand high temperatures without softening; it has strong oxidation resistance in aerospace, metallurgy and other high-temperature operations in a wide range of applications; it can be used in the manufacture of high-temperature furnace components, heat-resistant parts of aircraft engines and so on.

Strong chemical stability: Silicon nitride beads have excellent chemical resistance, can remain stable and are not easily eroded. This characteristic makes it highly favored in chemical and electronic fields; for example, it can be used as a corrosion-resistant reaction vessel lining or catalyst carrier in chemical production. Good self-lubrication: Silicon nitride beads have a smooth surface, low coefficient of friction and good self-lubrication. In some mechanical parts that need to reduce friction, such as rolling bearings, the use of silicon nitride beads can reduce friction loss.

Low density: Silicon nitride beads have a low density compared to some metallic materials. In weight-critical applications, such as aerospace and high-speed trains, the use of Silicon Nitride beads can ensure performance while reducing component weight and improving overall efficiency and performance.

Specifications table of Silicon Nitride Beads

Property	Typical Value
Density	\(3.2 – 3.3 g/cm^3\)14
Young’s Modulus	290 – 307 GPa
Flexural Strength	800 – 1030 MPa
Fracture Toughness	\(6 – 7 MPa·m^{1/2}\)
Hardness	HRC 78, Vickers hardness over 15004
Thermal Expansion Coefficient	\(1.6×10^{-6}/K\)1
Thermal Conductivity	24 – 36 W/m·K
Volume Resistivity	\(＞10^{14} Ω·cm\)
Max. Service Temperature	1200℃1
Size Range	Diameter from 0.4 mm to 60 mm1
Machining Accuracy	G5, G10, G20, G40 – G100 levels

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Applications of Silicon Nitride Beads

Silicon Nitride Beads are used in a variety of applications due to their excellent properties:

Grinding: Silicon Nitride Beads are ideal as grinding media due to their high hardness and strength. In the production process of ceramics and electronic materials, they are used for grinding powder particles, which can grind the materials finer and more uniformly, and their own wear is small, which can effectively reduce the cost of grinding and the introduction of impurities.

Bearing field: As the rolling beads of rolling bearings, silicon nitride beads have low density, good self-lubrication and high-temperature resistance. This enables the bearings to reduce centrifugal force, friction and heat generation at high speeds and improves the service life and reliability of the bearings, which are commonly used in aerospace, high-speed machine tools and other fields with very high demands on bearing performance.

Chemical industry: Based on their excellent chemical stability, silicon nitride beads can be made into the lining of chemical reactors, catalyst carriers and so on. They can resist the corrosion of various chemicals, ensure the integrity of the reaction vessel and the stability of the catalyst, and help improve the safety and efficiency of chemical production.

Electronic field: silicon nitride beads have excellent insulating properties and thermal stability and can be used to manufacture electronic packaging materials, ceramic substrates and so on. It can effectively protect electronic components, improve the heat dissipation performance and reliability of electronic equipment, and play an important role in integrated circuits and semiconductor devices.

Aerospace field: With its low density, high strength, high-temperature resistance and other characteristics, silicon nitride beads can be used in the manufacture of aero-engine turbine blades, combustion chamber components and so on. It helps to reduce the weight of the engine, improve combustion efficiency and engine performance, which in turn improves the fuel economy and flight performance of the airplane.

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 Beads

Q1: How are silicon nitride beads prepared?

Usually, high-purity silicon nitride powder is first synthesized by vapor deposition or solid phase reaction, then made into blanks by isostatic pressure molding or injection molding, and finally, densification is achieved by hot isostatic pressure sintering.

Q2: What do I need to pay attention to during the preparation of silicon nitride beads?

It is necessary to precisely control the parameters such as temperature, atmosphere, pressure, etc., use high-purity raw materials, and prevent the introduction of impurities so as not to lead to changes in the crystal structure, cracks and other defects.

Q3:How to test the quality of silicon nitride beads?

For large-size silicon nitride beads, ultrasonic inspection, X-ray CT scanning, laser interference detection, optical microscope and scanning electron microscope observation and other techniques are often used to detect internal and surface defects.

Q4: What are the quality standards for silicon nitride beads?

International standards such as ISO 3290 define the precision grade of bearing balls, and silicon nitride beads for medical implants are subject to ISO 10993 biocompatibility certification.

Q5: What is the difference between silicon nitride beads and zirconia ceramic balls?

Silicon nitride beads are harder and more resistant to high temperatures but are slightly less tough and less dense than zirconia ceramic balls.