Silicon Nitride (si3n4) Properties And Applications

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Silicon Nitride (si3n4) Properties And Applications

2021/01/01

Silicon Nitride Si3N4 Ceramic is one kind of technical ceramic materials which has good comprehensive properties for different applications.

Its mechanical strength can be kept up to 1200℃. Its hardness and wear resistance performance ranks high among all technical ceramic materials.

It has high electrical resistivity, high dielectric constant and low dielectric loss, is a choice for electrical insulation.

Furthermore, it has good chemical stability and resistance to oxidation.

Properties	Unit	Value
Color	-	Black
Density	g/cm3	≥3.20
Vickers Hardness	Mpa	1500
Modulus of Elasticity	Gpa	300
Fracture Toughness	Mpa.m1/2	6.2
Flexural Strength(@R.T.)	Mpa	>720
Compressive Strength(@R.T.)	Mpa	2200
Thermal Conductivity(@R.T.)	W/m.k	15-20
Coefficient of Thermal Expansion	10-6/℃	3.0-3.2
(25~1000℃)	10-6/℃	3.0-3.2
Poisson Ratio	-	0.26
Max. Working Temperature	℃	1200
Volume Resitivity (@R.T.)	Ω.cm	>1014
Dielectric Constant(1MHz, @R.T.)	-	8.2
Dielectric Strength	Kv/mm	16

Application:

Bearing balls and rollers

Cutting tools

Valves, turbocharger rotors for engines

Turbine blades

Diesel engine glow plugs

Molten metal handling

Thermocouple sheaths

Welding jigs, fixtures and nozzles

Ceramic Ball

MKL FACTORY can produce various ceramic structural parts according to customer requirements.

We can produce with materials include ZrO2., SI3N4, AI2O3, SiC.

Products include various ceramic sliding bearings, ceramic seals, ceramic bushings, ceramic shaft cores, blocks, and ceramics. Standard parts, ceramic rods, ceramic roller needles.

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Introduction to Bearings