Product Details

Flanged silicon carbide protection tube

SiC%	Fe2O3	AI2O3%	Dissociative SI+SIO2%	Dissociative C%
≥98	≤0.5	≤0.02	≤0.4	≤0.3

Physical property

Specific weight	3.2		Moh's hardness	9.5-9.8		Tensile strength	>1.50
Porosity %	25~32		specific heat Kcal/Kg C	0 C	0.148	rates of radiationλ=0.65μ	0.87
average coefficient of linear expansion 10- M/C	600C	4.3		400C	0.255	thermal conductivity Kcal/Mh C	600C	14-18
	900C	4.5		800C	0.294		1100C	12- 16
	1200C	4.8		1200C	0.325		1300C	10-14
	1500C	5.2		1600C	0.355		1300C	10-14

Reaction sintering SiC

Chemical Composition

SiC ≥87 %

Dissociative silicon≤12.5%

Dissociative carbon≤0.1%

Others≤0.4%

Item	Unit	Data
Using temperature	C	1380
Density	g/cm3	≥3.02
Porosity	%	<0.1
Flexural strength	Mpa	250(20C)
Flexural strength	Mpa	280(1200C)
Modulus of elasticity	Gpa	330(20C)
Modulus of elasticity	Gpa	300(1200C)
Thermal conductivity	W/m.k	45(1200C)
Coefficient of thermal expansion	K-1x10-6	4.5
Moh's hardness		13

Introduction of Si3N4 bonded SiC product

Si3N4 bonded SiC as a new type refractory material,is used widely.The applying temperature is 1400 ℃.It has better thermal stability,thermal shock,which is better than plain refractory material and recrystallization SiC.It also has antioxidation,high corrosion resistant,wear-resistantance,high bending strength.It can resist corrosion and scouring,be no polluted in molten metal such as AL,Pb,Zn,Cu ect.

The diameter of Si3N4 bonded SiC thermocouple protection tube is Φ20-50mm,length is 1600 mm.It can be usded in high temperature kiln furnace and all kinds of atmosphere.It also can be used in all kinds of melted liquid.

The physical and chemical performance of Si3N4 bonded SiC :

Item	Index
Compressive strength Mpa	> 120
Bending strength Mpa	> 40
Vol. density g/cm³	2.4
Porosity %	20
Thermal conductivity (1200 C) W/M C	15
Thermal shock 1000C-20C	> 20 times
Resistivity	10000
Moh's hardness	> 9

Specification of Si3N4 bonded SiC thermocouple protection tube:

Diameter mm	Inner dia.mm	Length mm
Φ20	12	500-1000
Φ25	14	500-1200
Φ30	18	500-1300
Φ40	25	500-1300
Φ45	29	500-1300
Φ50	32	500-1300
Φ60	42	500-1400
Φ70	52	500-1500
Remarks:.
1. It can be made one sealing end,or both open ends
2.The diameter of all kinds of crucible can made Φ70,height 600 mm