高アルミナ質断熱レンガは、高アルミナ質軽量レンガとも呼ばれる。Al2O3含有量が48%以上の高性能断熱材です。珪砂や希土類元素などの副資材を少量添加することで、れんがの性能を向上させることも可能です。表面接触温度は1400℃以下。
| アイテム/グレード | 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 (Fe2O3)/% | μ0 ≤ | 2.0 | |||||
| σ | 0.3 | ||||||
| かさ密度/(g/cm³) | μ0 ≤ | 1.2 | 1 | 0.8 | 0.7 | 0.6 | 0.5 |
| σ | 0.05 | ||||||
| 冷間圧壊強さ/MPa | μ0 ≥ | 4.5 | 3.5 | 2.5 | 2.2 | 1.6 | 1.2 |
| σ | 1.0 | 0.5 | 0.2 | ||||
| X分 | 4.0 | 3.0 | 2.2 | 2.0 | 1.5 | 1.0 | |
| 永久減衰率/% (T/℃*12h) | 試験温度 | 1400 | 1350 | 1250 | |||
| X分~Xマックス | -2~1.0 | ||||||
| 熱伝導率係数/[W/(m・K)] ≤ °C 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.