PRODUCT PARAMETERS
Description
Product Introduction
The linear expansion coefficient of silicon nitride ceramic ball is 3.2×10-6/K, which is almost 1/4 of the bearing steel ball. The self-lubricating properties of silicon nitride ceramic ball bearings can solve the pollution caused by the lubricating medium and the inconvenience of adding. Chemical resistance, mechanical strength, fracture toughness, low thermal conductivity. Application fields: composite bearings, mechanical seals, chemical pumps, nozzles, auto parts, heat exchanger parts, vacuum equipment, etc.
Silicon nitride ceramic ball can be used for a variety of bearings with performance requirements: high-speed bearings, high precision bearings, vacuum bearings, high/low temperature bearings, non-magnetic bearings, high precision ball screw; Can also be used in chemical pump, high temperature pump, metering pump used as valve ball, measuring ball.
Technical Parameter:
|
Property |
Unit |
Silicon nitride |
|
Color |
Black |
|
|
Mechanical Properties |
||
|
Density |
g/cm3 |
3.2 |
|
Compressive Strength |
MPa |
2500 |
|
Flexural Strength |
MPa |
900 |
|
Vickers Hardness |
GPa |
15 |
|
Thermal Properties |
||
|
Maximum Temperature |
°C |
1500 |
|
Thermal Conductivity @ 20°C |
W/mK |
19 |
|
Thermal Expansion a at 20–100°C |
10-6/K |
3.2 |
|
Specific Heat |
100°C |
800 |
Advantage:
low density, low weight
greatly electrical insulation
non-wetting to non-ferrous metals
high hardness, high wear resistance
low coefficient of thermal expansion
outstanding resistance to thermal shock
maximum service temperature up to 1,500 °C
superior corrosion resistance to molten metals
