The properties and applications of silicon nitride ceramics that you don't know

August 01, 2024

Silicon Nitride (Si3N4) is a high melting point ceramic material with extremely high hardness and chemical inertness. Hot pressed silicon nitride, in particular, is one of the hardest substances in the world.

What is silicon nitride ceramic (Si3N4)?

Silicon nitride (Si3N4) is a high melting point ceramic material with extremely high hardness and chemical inertness. In addition, silicon nitride ceramic has a low thermal expansion coefficient, high thermal conductivity, and excellent thermal shock resistance. Therefore, people often use it to manufacture mechanical components such as bearings, turbine blades, Mechanical Seal rings, and permanent molds.

Chemical formula of silicon nitride:

The chemical formula of silicon nitride is Si3N4, with a molecular weight of 140.28. It dissolves at 1900°C under pressure, and its color is usually gray or gray-black after high-temperature sintering.

Hardness of silicon nitride ceramics:

The Mohs hardness of silicon nitride ceramics is 9~9.5, and the Vickers hardness is about 1550. It is one of the hardest substances in the world.

Precautions for using silicon nitride ceramics

At not too high a temperature, silicon nitride has high strength and impact resistance, but above 1200℃ it will break with the increase of use time, reducing its strength. Above 1450℃ it is more prone to fatigue damage, so the use temperature of silicon nitride generally does not exceed 1300℃.

What are the uses of silicon nitride ceramics?

Rotating ball and roller bearings;
Cutting tools:
Engine parts: valves, rockers;
Arm pads, sealing faces;
Induction heating coil supports;
Turbine blades, vanes, buckets;
Welding and brazing fixtures;
Heating element assemblies;
Crucibles;
Metal tube forming rollers and dies;

TIG/plasma welding nozzles;

Welding positioners;

Precision shafts and axles in high wear environments;

Thermocouple sheaths and tubes;

Semiconductor process equipment

Silicon Nitride Ceramics Manufacturers

If you want to know more about us, please contact us.

Jinghui Industry Limited is a leading manufacturer of Advanced ceramics products, we have been committing to development, production, sales and service of a variety of Ceramic Components since its establishment in 2008.

The facility focus on producing mainly in alumina, zirconia, aluminum nitride, steatite and cordierite, including Metallized Ceramics, ceramic grinders, ceramic plates, structural ceramic components, Thermostat Ceramics, Ceramic Seals , Textile ceramics , Ceramic Insulators and other plenty of electronic and industrial Ceramic parts . They are mainly used in electronic appliances, equipment, and mechanical engineering, automotive industry, medical technology, new energy and environmental protection, aerospace and so on.

The enterprise acquired ISO9001: 2008 in 2009, all of us in Jinghui persist the policy "No quality, No development", and it helped us succeed in exporting to more than 50 countries on European, North America, Asia, South America and African through all Jinghui people's effort, innovation, and initiative.

Many amazing solutions were to be supplied to our customers to reach their toughest technical challenges. Our goal is to find a better and optimal solution for all our customers from technology, quality, cost control, and after-sales services, we are looking forward to cooperating with you to create a totally new business in your field.

Author:

Mr. Andy Chen

E-mail:

andy@jinghui0738.com

Phone/WhatsApp:

8613760126904