Sillimanite brick Low thermal expansion rate, erosion resistant, wear resistant, thermal shock resistant. Used in glass production lines, melting furnaces, linings of metallurgical blast furnaces, and kiln furniture in the ceramic industry.
Sillimanite bricks are refractory materials prepared from sillimanite - group minerals as the main raw material through high - temperature firing or slurry casting methods. They transform into mullite phase at high temperatures, featuring excellent volume stability and mechanical strength.
Features and Properties
| Index Items | Machine-pressed | Cast | |||
| Al₂O₃ /% | ≥57 | ≥60 | ≥65 | ≥60 | |
| Fe₂O₃ /% | ≤1.2 | ≤1.0 | ≤1.0 | ≤1.0 | |
| Bulk density (g/cm³) | ≥2.40 | ≥2.45 | ≥2.50 | ≥2.45 | |
| Apparent Porosity (%) | ≤18 | ≤18 | ≤17 | ≤18 | |
| Cold Compressive Strength (MPa) | ≥70 | ≥70 | ≥70 | ≥60 | |
| Load-Softening Temperature at 0.2MPa,T0.6/℃ | ≥1560 | ≥1580 | ≥1650 | ≥1550 | |
| Thermal Shock Stability (1100℃, water-cooled) (times) | ≥25 | ≥20 | ≥15 | ≥25 | |
| Permanent Linear Change on Heating (1450℃×2h) (%) | -0.2 - +0.2 | -0.2 - +0.2 | -0.2 - +0.2 | -0.2 - +0.2 | |
Also Called:Silica Mullite Brick;
Al₂O₃:60-65%;
Bulk Density:≥2.55g/cm³;
SiO₂:≥97%;
Bulk Density:≥1.86g/cm³;
Cold Crushing Strength:≥40MPa;
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