What is silicon nitride used for?
The vast majority of silicon nitride bearings are used in hybrid ball bearings (bearings with ceramic balls and steel races). Applications include machine tool spindles, vacuum pumps and sterilisable and unlubricated dental drills.
Is silicon nitride toxic?
Unusual Fire & Explosion Hazard: When heated to decomposition, silicon nitride may emit toxic fumes of ammonia and ozone. Contact with acids may generate flammable hydrogen gas.
What is the compressive strength of silicon nitride?
524 5500
Silicon Nitride (Si3N4) Properties and Applications
| Property | Minimum Value (S.I.) | Maximum Value (S.I.) |
|---|---|---|
| Density | 2.37 | 3.25 |
| Energy Content | 150 | 200 |
| Bulk Modulus | 120 | 241 |
| Compressive Strength | 524 | 5500 |
Can silicon nitride be machined?
Silicon Nitride can be machined in green, biscuit, or fully dense states. It can be machined relatively easily into complex geometries while in the green or biscuit form.
What is the hardness of silicon nitride?
It is very hard (8.5 on the mohs scale).
Is silicon nitride a dielectric?
Silicon nitride, Si3N4, is a common dielectric material used in semi-conductor processing. It can be deposited on a wide variety of substrates using techniques such as LPCVD, PECVD, Sputtering, and Evaporation. The deposition technique used will affect the quality and dielectric strength of the silicon nitride.
Is silicon nitride biodegradable?
Silicon nitride as a bulk material has been shown to be bioinert and having good biocompatibility. This suggests that the use of Si3N4 in hip implants may give less wear particles and those produced would be biocompatible and biodegradable.
What is the melting point of silicon nitride?
3,452°F (1,900°C)
Silicon nitride/Melting point
Is silicon nitride crystalline?
Silicon nitride can have either of two crystalline structures. The α-Si3N4 phase is hexagonal, with each nitrogen atom bonded to three silicon atoms in a distorted trigonal planar configuration and each silicon atom tetrahedrally bonded to four nitrogen atoms (Wyckoff, 1964).
Is Silicon Nitride a ceramic?
Abstract. Silicon nitrides are a group of advanced engineering ceramics with high strength, fracture toughness, hardness, wear resistance and good chemical and thermal stability.
Is silicon nitride an insulator?
Silicon nitride is often used as an insulator and chemical barrier in manufacturing integrated circuits, to electrically isolate different structures or as an etch mask in bulk micromachining.
