High Thermal Shock Resistance Silicon Nitride Si3N4 Ceramic

Model:	UPT-020
Brand:	UNIPRETEC
Origin:	Made In China
Category:	Metallurgy , Mining & Energy / Metallurgy & Mining / Non-metallic Mineral Products
Label:	silicon nitride , si3n4 ceramic , technical ceramic
Price:	US $10 / pc
Min. Order:	100 pc

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Product Description

Silicon nitrides (Si3N4) feature an excellent combination of material properties. They are nearly as light as silicon carbide (SiC), but their microstructure gives them excellent thermal shock resistance and their high fracture toughness makes them resistant to impacts and shocks.

Key Properties of Silicon Nitride
*High strength over a wide temperature range
*High fracture toughness
*High hardness
*Outstanding wear resistance, both impingement and frictional modes
*Good thermal shock resistance
*Good chemical resistance

Different Types of Silicon Nitride Ceramics
(1)Gas Pressured Sintered Silicon Nitride(GPSN)
GPSN is a family of fully dense materials having a range of compositions that are produced in cost effective, complex net shapes. This grade of silicon nitride has the best combination of properties making it the leading technical ceramic for a number of structural applications.

(2)Hot Pressed Silicon Nitride Ceramics(HPSN)
HPSN is formulated into a variety of compositions having minimal densification aids. These HPSN compositions offer the highest hardness of UNIPRETEC's silicon nitrides. Finished components are machined at precision diamond grinding facility.

Typical Silicon Nitride applications
1.Bearing balls and rollers
2.Cutting tools
3.Valves, turbocharger rotors for engines
4.Turbine blades
5.Glow plugs
6.Molten metal handling
7.Thermocouple sheaths
8.Welding jigs and fixtures
9.Welding nozzles

Characteristics	Unit	95 Al2O3	99 Al2O3	ZrO2	GPSi3N4	BN	Glass Ceramic
Crystal Structure	-	hexagonal	hexagonal	tetragonal	hexagonal	hexagonal	-
Color	-	white	ivory	white	gray	white	white
Density	g/cm3	3.65	3.88	5.95	3.22	2.26	2.55
Water Absorption	%	0	0	0	0	0.0-1.0	0
Young's Modulus	Gpa	280	350	205	295	670	65
Vickers Hardness	Gpa	14	20	12	18-20	-	-
Flexural Strength	Mpa	280	300	900	650	51	100
Compressive Strength	Mpa	2000	2500	2200	2200	230	500
Thermal Conductivity	W/(m·k)	18-25	30	2.2	25	20	1.7
Thermal shock resistance	Δ(℃)	220	180-200	280-350	450-650	>1500	25-100
Max. Working Temperature	℃	1500	1700	850	1200	960	800
Volume Resistivity	Ω·cm	>10^15	>10^14	>10^12	>10^14	10^13	10^16
Dielectric Constant (1 MHz )	-	9.5	9.8	26	8.2	4.08	6.02
Dielectric Strength	kV/mm	16	22	-	16	375	40

About UniPreTec
UniPreTec provides high-performance ceramic products in Alumina, Zirconia, Zirconia Toughened Alumina, Silicon Carbide, Silicon Nitride and further special materials. Along with these materials, we offer several machining from which to choose such as cutting, drilling, sawing, turning, grinding, polishing etc.. Furthermore, our technologies and equipments allow us to provide various and flexible forming processes, like dry pressing, isostatic pressing, extrusion, injection moulding and slip casting.