Clay insulating bricks feature a lightweight, porous structure. Through scientific particle grading and firing techniques, numerous sealed micro-pores are formed within the clay matrix, delivering exceptional thermal insulation performance. Key characteristics include:
- Superior thermal insulation: Extremely low thermal conductivity effectively blocks heat transfer, significantly reducing furnace wall temperatures and achieving notable energy savings.
Lightweight and High Strength: Volume density is significantly lower than dense refractory bricks, reducing overall kiln load while maintaining sufficient mechanical strength for masonry requirements.
Low Thermal Mass: Minimal heat storage capacity shortens kiln ramp-up and cooling times, enhancing production flexibility—particularly suited for intermittent kilns.
Good Thermal Stability: Withstands normal thermal shocks within the operating temperature range.
Easy Processing and Installation: Can be readily cut, drilled, and otherwise machined on-site, facilitating installation in complex areas.
Key Technical Specifications:
- Al₂O₃ Content: 30% - 48% (corresponding to different temperature grades)
- Bulk Density: 0.6 g/cm³ - 1.2 g/cm³ (series products)
- Compressive Strength at Room Temperature: ≥ 1.5 MPa - 6.0 MPa (increases with density)
- Thermal Conductivity (Average Temperature 350±25℃): 0.15 W/(m·K) - 0.35 W/(m·K)
- Linear Change on Re-firing (8h Holding): ≤ 2% (at respective specified temperatures)
- Maximum Service Temperature: 1050℃ - 1400℃ (graded)
