1 SIC Sintering Silicon Carbide Thermocouple Tubes

• SiC ceramic thermocouple protection tube called recrystallized silicon carbide tube for Industrial furnace.
• Silicon carbide (SiC) is a lightweight ceramic material with high strength properties, excellent thermal conductivity, low thermal expansion, and is resistant to corrosion from acids.
• Because of its excellent properties, silicon carbide products are more and more widely applied in various fields nowadays.

 

2 Types of silicon carbide tube

• Recrystallized silicon carbide (RSIC)— max temperature 1650℃

• Nitride bonded silicon carbide (NSIC)— max temperature 1450℃

• Reaction sintered silicon carbide (SiSiC / RBSiC)— max temperature 1380℃

• Pressureless sintered silicon carbide (SSiC)— max temperature 1600℃

 

3 Standard sizes of Mission alumina tubes:

Furnace Tube
Diameter OD/ID (mm)	30/25		40/34		50/44			60/53		70/63		80/70		85/75		90/80		100/90		110/100
Max Length (mm)	2000		2000		2000			2000		2000		1700		1600		1600		1500		1200
Thermocouple Protection Tube
Diameter OD/ID (mm)	5/3	6/4		8/5		10/7			12/8		14/10		15/10		16/12		17/14		20/16		25/19
Max Length (mm)	300	1000		1600		2000			2000		2000		2000		2000		2000		2000		2000

4.Physical and chemical index

Silicon carbide tube
Item	Unit	RSiC	NSiC	SiSiC
Density	(g/cm3)	2.60-2.72	≥2.75	≥3.02
Porosity	%	≤17	≤10	≤0.1
Thermal Expansion	10-6 k-1	4.8	4.6	4.5
Thermal conductivity	W/m.k	23	25	45
Bending strength (4-point)	MPa (at20℃) MPa (1200℃)	≥ 90 ≥100	≥150 ≥170	≥250 ≥280
Youngs Modulus	GPa (20℃)	240	280	320
Max temperature	℃	1650	1450	1380

5 Application:

Silicon carbide tube is mainly used in the production of aluminum, copper and  zinc , as the lining material of the molten pool and electrolytic bath (reduction bath).