Cordierite
Cordierite is a versatile nonmetallic mineral raw material in the industrial field. It is widely used in metallurgy, electronics, automobile, chemical industry, environmental protection and other fields.
It can be used as high-quality refractory materials, electronic packaging materials, catalyst carriers, foam ceramics, printed circuit boards and low-temperature thermal radiation materials.It can be used as a material alone, also can be compounded with other materials to make composite materials.
It can be used as high-quality refractory materials, electronic packaging materials, catalyst carriers, foam ceramics, printed circuit boards and low-temperature thermal radiation materials.It can be used as a material alone, also can be compounded with other materials to make composite materials.
|
Item
|
Aluminium Porcelain
|
Mullite
|
dense Mullite
|
loose Mullite
|
Mullite-cordierite composite
|
Corundum
|
|
SiO2
|
40-45
|
25-30
|
49-53
|
30-34
|
28-36
|
8-11
|
|
Al2O3
|
48-55
|
66-72
|
38-42
|
58-62
|
55-65
|
85-92
|
|
MgO
|
4-6
|
2-3
|
2.5-3.2
|
1.8-2.5
|
||
|
Fe2O3
|
＜1.0
|
＜1.0
|
＜1.2
|
＜1.5
|
＜0.8
|
＜0.5
|
|
TiO2+BaO
|
＜1.6
|
＜2.2
|
||||
|
CaO+Na2O
+K2O |
4.0-5.5
|
＜1.0
|
＜2.5
|
＜2.5
|
＜1.0
|
0.5-1.2
|
Physical and chemical properties
|
Item
|
Unit
|
Mullite
|
loose Mullite
|
dense Mullite
|
Mullite-cordierite composite
|
Corundum
|
|
Gross Density
|
g/cm3
|
＞2.9
|
2.2-2.4
|
2.7-2.9
|
＞2.9
|
＞3.2
|
|
Acid Resistance
|
%
|
≤0.5
|
≤0.5
|
≤0.5
|
≤0.5
|
≤0.5
|
|
(20-1000 oC)
|
10-6 oC -1
|
5.5-6.5
|
3.5-6
|
5-7
|
≤5
|
6-7
|
|
Max Working Temperature
|
oC
|
1600
|
1300
|
1360
|
1550
|
1750
|
|
Heat Capacity
|
(J/ Kg.K)
|
1100-1300
|
800-1000
|
850-1050
|
1100-1300
|
1300-1400
|
|
Heat Conductivity
|
W/MK
|
1.4-2.0
|
1.5-2.5
|
1.8-2.8
|
1.3-1.8
|
5-10
|
Features：
-Good electrical insulation
– High temperature resistance
– High corrosion resistance
– Excellent thermal stability
– Resistance to high temperatures
– Good chemical stability and resistance-High strength
-Corrosion resistance
-Good electrical insulation
– High temperature resistance
– High corrosion resistance
– Excellent thermal stability
– Resistance to high temperatures
– Good chemical stability and resistance-High strength
-Corrosion resistance
Usage:
all electric products, electric heating products and wear resistant machinery parts.
all electric products, electric heating products and wear resistant machinery parts.
