Silicon Nitride (Si3N4) is a widely used ceramic material in high temperature application, in high temperature condition, the strength of silicon nitride can be kept up to 1200℃. Silicon nitride is very strong, especially hot pressed silicon nitride, which is one of the hardest substances in the world. Silicon nitride ceramics possess excellent properties of high thermal stability,antioxidant capacity and good dimensional precision of products. Silicon nitride is especially suitable for thermocouple protection tube measuring temperature of molten aluminum for its anti-fusion. Additionally, its low thermal conductivity and high wear resistance make it an excellent material that can withstand the toughest of conditions in the most demanding industrial applications. In order to guarantee tube’s quality,we used the excellent raw material and adopt strict total quality management and advanced techniques.

GS Silicon Nitride Ceramic Features:

1.Long life

2.Maximum service temperature up to 1,200 °C

3.Good insulation

4.Wear resistant.

5.Accept to customize

Application industry: electronic, semiconductor, chemical, petroleum, smelt.

Specific application: Welding shaft, electronic substrate, plunger,

nozzle, slide guide, diesel parts, metal molding, shaft wheels etc.

Technical Data

Silicon Nitride Material Analysis
Item	Unit	Material and Modle NO.
Item	Unit	Silicon Nitride YK-100	Silicon Nitride YK-200
Bulk density	g/cm3	3.2	3.2
Water absorption	%	0	0
Bending strength	Mpa	750	800
Young modulus	Gpa	280	290
Fracture toughness	Mpa ∙ m1/2	6.5	7
Poisson’s ratio	–	0.28	0.28
Vickers hardness	Gpa	15	15
Coefficient of linear expansion	×10-6/℃	3.4	3.5
Thermal conductivity	W/(m ∙ k)	26	50
Specific heat	J/(g ∙ k)	0.65	0.61
Volume resistivity	Ω ∙ cm	> 1014	> 1014
Heat shock resistance	℃	800	900
Maximum operation temperature	℃	1150	1150