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Ningbo Ram Electric Material Ltd.
Model No: NBR
Brand: NBRAM, Mitsubishi
Material: Rubber
Packaging: Box In strong cartons,on exporting pallet
Productivity: 100000
Place of origin: China
1. Material: Mullite
Description
1. The product is sintered under high temperature with high- purity raw materials and advanced production technologies.
2.High pressive strength.
3. High temperature resistance as well as thermal shock resistance.
4. It is widely used in the lining of medium-high temperature kilns.
Corundum-mullite refractory material can be used in linings or heat-insulating materials of the industries, such as ethylene pyrolysis furnaces, tubular furnaces, reforming furnaces of synthetic ammonia, gas generators and high-temperature shullte kilns, etc.
|
Name |
Alumina |
Dense Cordierite |
Porous Cordierite |
Cordierite-Mullite |
Mullite |
Corundum mullite |
|
|
Density(g/cm3) |
2.0~2.3 |
2.1 ~2.5 |
1.5 ~1.9 |
1.8~2.3 |
2.0 ~2.5 |
2.3 ~2.7 |
|
|
Coefficient of heat expansion(×10-6K-1)(20~800°C) |
≤5 |
≤3.5 |
≤3.0 |
≤3.5 |
≤5 |
≤6 |
|
|
Specific Heat (J/Kg.K)(20~1000°C) |
900~1150 |
900~1100 |
900~1100 |
900~1150 |
1000~1150 |
1100~1300 |
|
|
Thermal Conductivity (W/m.k) (20~1000°C) |
1.5~2.0 |
1.5~2.5 |
1.2~1.8 |
1.5~2.0 |
1.5~2.0 |
1.5~2.5 |
|
|
Impact Thermal Resistance(°C/min) |
≥300 |
≥300 |
≥350 |
≥350 |
≥350 |
≥300 |
|
|
Max. Working Tem.(°C) |
1350 |
1300 |
1300 |
1320 |
1450 |
1550 |
|
|
Water absorption(%) |
15-25 |
≤2 |
15~25 |
15 ~25 |
15~25 |
15 ~25 |
|
|
Compressive strength(MPa) |
≥28 |
≥28 |
≥25 |
≥25 |
≥28 |
≥30 |
|
|
Chemical composition (%) |
Al2O3 |
55 ~65 |
25 ~38 |
28 ~38 |
40~52 |
60 ~70 |
70 ~80 |
|
SiO2 |
25~35 |
50 ~60 |
45 ~55 |
45 ~55 |
25 ~35 |
15 ~25 |
|
|
MgO |
1~3 |
5 ~10 |
11 ~14 |
7~9 |
0 ~1 |
0 ~2 |
|
|
others |
<5 |
<5 |
<5 |
<5 |
<5 |
<5 |
|
2. Feature:
1). low thermal expansion
2). large specific heat capacity
3). high specific surface area
4). low pressure drop
5). small thermal resistance
6). good thermal conductivity
7). good heat-shock resisting ability
3. Application:
1)Electric appliance industry
2)Automotive industry
3)Mechanical industry
4)Engineer industry
Product Categories : Mica Products > Mica Tube
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