vermiculite board:high temperature resistant,energy-saving and cost effective slabs for fireproof insulation purpose
Chemical (%) | Magnesium brick | Mg-Chrysolite Brick | Alumina brick | Andalusite brick | Fireclay brick | High alumina cast material | Insulation fireclay brick | VERMICULITE BOARD | Fiber wall material | Ceramic Fiberboard |
SiO2 | 2-3 | 42 | 13 | 38 | 60 | 30 | 60 | 37 | 30 | 52 |
Al2O3 | <0.5 | 0.8 | 81 | 58 | 35 | 62 | 35 | 7.0 | 9.0 | 48 |
TiO2 |
| <0.2 | 3-4 | <1 | <2.0 |
|
| 0.6 |
|
|
Fe2O3 | 2-3 | 6.0 | 1-2 | 1.5 | <3.0 | 0.8 | 1.7 | 5.6 | 3.0 |
|
CaO | <0.3 | 0.2 | 0.3 | <0.4 | <0.5 | 1.4 | 0.5 | 1.2 | 45 |
|
MgO | 88-91 | 49 | 0.3 | <0.3 | <0.5 |
|
| 26 | 5 |
|
Na2O |
| <0.1 | 0.1 | <0.2 | <1.0 |
| <0.7 | 0.2 |
|
|
K2O | <0.5 | <0.1 | 0.4 | <0.5 | <1.5 |
| <1.5 | 1.2 | 2.6(+Na2O) |
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P2O5 |
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| 11 |
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Loss of ignition |
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| 7.5 | 6.0 |
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X ray
| Periclase, Mg-Chrysolite etc | Mg-Chrysolite | Corundum, Mullite etc | Andalusite, mullite quartz | Mullite, quartz |
| Mullite quartz | Vermiculite phlogopite | Calcite, C3S C2S | Glass phrase |
Density g/cm3 | 2.9 | 2.6 | 2.8 | 2.5 | 2.0-2.2 | 2.6 | 0.8 | 1.4 | 0.6 | 0.24 |
Open porosity % | 17-19 | 19-21 | 22 | 18 | 15-19 |
|
| 45 |
|
|
Cold crushing strength Mpa | 80 | 35 | 60 | 60 | 50 | 70 | 1-3 | 6 |
| <1 |
Thermal conductivity W/m.K |
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300°C | 8.4 | 1.3 | 2.2 | 1.9 | 1.2 |
| 0.28 | 0.24 | 0.20 | 0.07 |
600°C | 6.3 | 1.3 | 2.3 | 1.8 | 1.3 | 1.7 | 0.35 | 0.31 | 0.25 | 0.12 |
1000°C | 4.0 | 1.3 | 2.4 | 1.7 | 1.4 |
| 0.45 |
| 0.30 | 0.22 |