材质 | 镁质 | 镁钙质 | 镁钙质 | |
化学成分/% | MgO | ≥80 | 65~75 | 55~65 |
SiO2 | 4~6 | ≤5 | ≤5 | |
CaO | — | 8~10 | 20~35 | |
体积密度/g·cm3 | 110℃,24h | 1.6~20 | 1.7~2.0 | 1.7~2.0 |
1500℃,3h | 1.7~2.1 | 1.8~2.1 | 1.8~2.1 | |
抗折强度/MPa | 110℃,24h | 1.5~2.0 | 1.6~2.3 | 2.0~2.5 |
1500℃,3h | 4~6 | 5~6 | 5~8 | |
线变化率/% | 110℃,24h | -(1.0~1.5) | -(1.2~1.8) | -(1.2~2.5) |
1500℃,3h | -(2.5~3.1) | -(2.0~3.0) | -(2.5~3.2) | |
热导率/W·(m·K) | 1000℃ | ≤0.6 | ≤0.6 | ≤0.6 |