Batu bata insulasi alumina tinggi juga disebut batu bata ringan alumina tinggi. Ini adalah bahan insulasi berkinerja tinggi dengan kandungan Al2O3 lebih dari 48%. Dimungkinkan juga untuk menambahkan sejumlah kecil bahan tambahan seperti pasir silika dan elemen tanah jarang untuk meningkatkan kinerja batu bata. Suhu kontak permukaan tidak lebih tinggi dari 1400 ℃.
| Item / Kelas | 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 | ||||||
| Kepadatan Massal / (g/cm³) | μ0 ≤ | 1.2 | 1 | 0.8 | 0.7 | 0.6 | 0.5 |
| σ | 0.05 | ||||||
| Kekuatan Penghancuran Dingin / MPa | μ0 ≥ | 4.5 | 3.5 | 2.5 | 2.2 | 1.6 | 1.2 |
| σ | 1.0 | 0.5 | 0.2 | ||||
| Xmin | 4.0 | 3.0 | 2.2 | 2.0 | 1.5 | 1.0 | |
| Perubahan Linier Permanen / % (T / ℃ * 12 jam) | Suhu Uji T / ℃ | 1400 | 1350 | 1250 | |||
| Xmin~Xmaks | -2~1.0 | ||||||
| Koefisien Konduktivitas Termal / [W / (m-K)] ≤ Suhu Rata-rata (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.