Si3N4 Nitride Silicon Ceramic Tube And Pipe For Metals Smelting Furnace RELIABLE QUALITY

Specifications Nitride Silicon Si3N4 Tube & Pipe

1.No taste,no toxicity,no contamination

2.Resistant to high temperature

3.Extended flexi

The Manufacturer Since Year 1980 With Perfect Experience & Steady Quality Assurance: High Performance Low Loss Silicon Nitride Si3N4 Tube Tube And Pipe Could Make To One End Closed.Low Thermal Conductivity To Be About 13 (at 25°C, W/m.k),The Best Media For Alloying Metals Smelting Industry.   Silicon nitride thermocouple protective tube ( protection tube) is formed by CIP biscuit, then machined to accurate dimension, and put it into Reaction-Sintered furnace for sintering. The special ceramic products by this modern advanced craft have the characteristics of high and equal density, good dimensional accuracy , etc. Silicon nitride is especially suitable for thermocouple protection tube measuring temperature of molten aluminum for its anti-fusion.   Silicon nitride ceramics possess excellent properties of high thermal stability, antioxidant capacity and good dimensional precision of products. As silicon nitride is covalent compounds with high bond energy and can form protective film of oxide in the air, so its good chemical stability can make silicon nirtide not be oxidized below 1200°C, and generate protective film to prevent further oxidation between 1200~1600°C. Silicon nitride can not be infiltrated and corroded by aluminium, lead, tin, silver, brass, nickel and other molten metals, but can be corroded by molten metal like magnesium, nicochrome and stainless steel.   Technical Data: 

Property of Silicon nitride products
Material	Unit	Si3N4
Volume density	g/cm 3	2.77
Young's modulus	Gpa	240
Flexural strength	MPa	186.4
Porosity	%	12
Thermal expansion coefficient	a×10-6	2.51
Fracture toughness	(Mpa*m -1 )	2.8
Thermal Conductivity	W/mk	15

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