Chemical composition |
Al2O3 (%) |
<40 |
SiO2 (%) |
>60 |
CaO (%) |
<2.0 |
Adding water % |
~7 |
Density after 1000℃ firing (g/cm³) |
~2.1 |
Strength at room temperature |
Flexural |
>6 |
Compressive |
>70 |
Dry strength 110℃x24h (Mpa) |
Flexural |
>8 |
|
Compressive |
>70 |
Strength after firing 1000℃x3h (Mpa) |
Flexural |
>10 |
|
Compressive |
>80 |
Residue linear change after firing 1000℃x3h |
<0.20 |
Heat-conduction coefficient (w/m.k) |
374℃ |
0.535 (MV) |
626℃ |
0.697 (MV) |
874℃ |
0.838 (MV) |
Linear thermal expansion (%) |
300℃ |
0.17 (MV) |
500℃ |
0.29 (MV) |
850℃ |
0.450(MV) |