高铝保温砖又称高铝轻质砖。它是一种 Al2O3 含量大于 48% 的高性能保温材料。也可以添加少量硅砂、稀土元素等辅助材料来提高砖的性能。表面接触温度不高于 1400℃。
| 项目/等级 | LG140-1.2 | LG140-1.0 | LG140-0.8L | LG140-0.7L | LG140-0.6L | LG140-0.5L | |
|---|---|---|---|---|---|---|---|
| ω（Al2O3)/% | μ0 ≥ | 48 | |||||
| σ | 1.0 | ||||||
| ω（铁2O3)/% | μ0 ≤ | 2.0 | |||||
| σ | 0.3 | ||||||
| 体积密度/（克/立方厘米） | μ0 ≤ | 1.2 | 1 | 0.8 | 0.7 | 0.6 | 0.5 |
| σ | 0.05 | ||||||
| 冷压强度/兆帕 | μ0 ≥ | 4.5 | 3.5 | 2.5 | 2.2 | 1.6 | 1.2 |
| σ | 1.0 | 0.5 | 0.2 | ||||
| X分钟 | 4.0 | 3.0 | 2.2 | 2.0 | 1.5 | 1.0 | |
| 永久线性变化/%（T/℃*12 小时） | 测试温度 T/℃ | 1400 | 1350 | 1250 | |||
| X分钟~X最大 | -2~1.0 | ||||||
| 导热系数/[W/(m-K)] ≤ 平均温度（350±25） | 0.55 | 0.50 | 0.35 | 0.30 | 0.25 | 0.20 | |
1.Low thermal conductivity, effectively reducing heat transfer.
2.High refractoriness, able to withstand high – temperature environments.
3.Good thermal shock resistance, enduring temperature fluctuations.
4.Low density, easy for installation and transportation.
1.In the metallurgical industry, it is used as blast furnace lining to reduce heat dissipation and improve smelting efficiency;
2.In the power generation industry, it is used as boiler insulation to improve heat utilization;
3.In ceramic kilns, it is used to stabilize the kiln temperature and ensure the firing quality.