Home / Products / Silicon Nitride (Si3N4) / Heating element components Silicon nitride ceramic screws


Share to:
facebook sharing button
twitter sharing button
line sharing button
wechat sharing button
linkedin sharing button
pinterest sharing button
whatsapp sharing button
sharethis sharing button

Heating element components Silicon nitride ceramic screws

Low density (3.17 g/cm3)
High fracture toughness (7 MPa m1/2)
Excellent flexural strength (850 MPa)
Exceptional thermal shock resistance
High maximum operating temperatures
  • 0306

  • HaoRui

  • custom

Silicon nitride ceramic screws

Silicon nitride is considered a very important engineering ceramic due to its adaptability to many different forms, with each form having distinctive properties. At high temperature, silicon nitride shows excellent mechanical properties including low density, high bending strength, high elastic modulus and fracture toughness, and high abrasion wear, as well as solid particle erosion resistance. In other words, this material is extremely strong and extremely tough. The material also shows excellent thermal properties, with minimal expansion and contraction due to temperature and the ability to withstand thermal shock (fast, significant changes in temperature). Finally, silicon nitride possesses exceptional chemical properties including stability against most acids and bases, corrosive gases and liquid metals.

Silicon Nitride Applications

Silicon nitride is highly versatile and can be effectively utilized in some of the most demanding work environments worldwide, thanks to its unique combination of chemical and thermodynamic properties. When silicon nitride is hot pressed, it demonstrates exceptional performance at high temperatures, making it an ideal choice for seal face components that face challenging conditions. These conditions include pumps in boiler water reactors, pumps in pressurized water reactors, corrosive borated water service, and rotating bearings. Furthermore, pump components made of silicon nitride are extensively used in the oil and gas industry, as well as in the petrochemical sector as a whole. The chemical stability of Si3N4 makes it suitable for surfaces within pumps, such as impellers, shafts, and seals, that regularly come into contact with abrasive slurries and corrosive fluids.

Properties Of Silicon Nitride

Property Item Data Unit



Color Black/Grey -
Density 3.2 g/cm3
Bending Strength 750 MPa
Compressive Strength 3800 MPa
Elastic Modulus 290 GPa
Fracture Toughness 7 MPa m1/2
Weber Coefficient 15 m
Vickers Hardness 1700 HV 0.5



Coefficient of Line

Thermal Expansion

2 10-6 K-1
Thermal Conductivity 20 W/mK
Thermal Shock Resistance (Put in Water) 750 ΔT℃
Max Working Temperature 1300



Volume Resistance at 20℃ >10 Ωcm
Dielectric Strength 10×106 V/m
Dielectric Constant - εr

One MHZ Dielectric

Loss Angle at 20℃

- tanδ



Nitric Acid(60%)90℃ 1 WT Loss mg/cm2/day
Sulphuric Acid(95%)95℃ ≒0.00
Caustic Soda(30%)80℃ 0.2

This data is the result of laboratory testing. Customers need to judge whether it can be used according to the specific environment.

For more customization details, Please contact us.

Leave a Message
Contact Us
Founded in June 2006, Shenzhen Haorui IndustriaI Technology Co.,Ltd. is a professional enterprise engaged in R&D, manufacturing and sales of non-standard industrial ceramics, hard alloys (tungsten steel) and various metal and non-metal precision machinery parts.

Quick Links

Product Category

Contact Us
Copyright © 2022 Shenzhen Haorui IndustriaI Technology Co.,Ltd. All rights reserved. Privacy Policy | Sitemap | Support By Leadong