Si3n4 Silicon Nitride Welding Ceramic Pin for Location Dowel

• Application: Refractory, Structure Ceramic, Industrial Ceramic
• Material: Si3n4 Silicon Nitride
• Type: Ceramic Parts
• Color: Black,Grey
• Size: M4 M5 M6 M8 M10 M12
• Feature 2: Good Abrasion and Corrosion Resistance
• Model NO.: YN-316
• Temperature: 1400c,
• Type of Material: Rbsn, Hpsn,Ssn
• Transport Package: Carton
• Specification: customized
• Trademark: Yunnuo
• Origin: China
• HS Code: 8547100000
• Production Capacity: 5000000 PCS Per Year

Product Description

Si3n4 ceramics

Silicon nitride has very good comprehensive properties, such as very high strength, toughness, excellent

abrasion resistance and chemical resistance, high thermal conductivity and low thermal expansion coefficient,

which make it have good thermal shock resistance and stable performance. Due to these good

comprehensive properties and relatively low density, silicon nitride materials can meet the highest quality

requirements in applications. Typical applications include:

High-grade refractory crucible
Bearings and wire drawing dies
Welding nozzle and positioning pin
Cutting tools
Thermocouple protective sleeve
 

Item	Unit	Value
Density	g/cm3	3.2
Bending strength	MPa	750
Compressive strength	MPa	3,800
Elastic Modulus	GPa	290
Fracture toughness	MPam1/2	6.7
Weber coefficient	M	15
Vickers hardness	HV0.5	1,700
Linear expansion coefficient	10-6K-1	2.8
Thermal conductivity	W/mK	20
Resistance to thermal shock (water cooling)	TC	750
Maximum use temperature	C	1,300
Volume resistance, 20 ºC	Ωcm	>1014
Dielectric strength	V/m	10×106

 

The silicon nitride crucible is sintered by air pressure, and has good resistance to acid and weak alkaline

corrosion. For example, boiled hydrochloric acid, aqua regia, sulfuric acid, sulfuric

acid and aluminum hydroxide solution with a concentration below 25%. The silicon nitride cannot be corroded,

the dense silicon nitride has good oxidation resistance, and can still be used stably in an oxidizing

atmosphere below 1400 ° C. The silicon nitride material also has good stability to metal melts and is not

wetted, such as molten metals zinc, gold, silver, aluminum, cadmium, indium, lead, bismuth,
gallium, germanium, etc. and their alloys such as yellow Copper, hard aluminum, nickel silver, etc. all have

good corrosion resistance.