Introduction
Lightweight clay bricks are insulating refractory products manufactured from refractory clay with a porous structure to achieve low density and excellent thermal insulation. Grade JH-NG1.3 features Al₂O₃ ≥25%, bulk density ≤1.3 g/cm³, and cold crushing strength ≥5 MPa. The material delivers low thermal conductivity of ≤0.55 W/(m·k) at 350±25℃ and maintains good volume stability with heating shrinkage ≤2% at 1300℃×12h. Widely used as insulating back-up linings behind working linings in various industrial furnaces and kilns.
Key Advantages
01
Low Thermal Conductivity
Thermal conductivity ≤0.55 W/(m·k) at 350±25℃ effectively minimizes heat loss and reduces energy consumption in high-temperature operations.
02
Excellent Thermal Insulation
Low bulk density and porous structure provide superior insulation performance, protecting furnace shells and improving thermal efficiency.
03
Good Volume Stability
Heating shrinkage ≤2% at 1300℃×12h ensures dimensional stability under prolonged high-temperature service, preventing cracking and structural loosening.
Specification
| Item | JH-NG1.3 |
| Al₂O₃ (%) | ≥25 |
| Bulk Density (g/cm³) | ≤1.3 |
| Cold Crushing Strength (MPa) | ≥5 |
| Heating Shrinkage at 1300℃×12h (%) | ≤2 |
| Thermal Conductivity at (350±25) ℃/(W/(m.k)) | ≤0.55 |
