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Product introduction of alumina bubble bricks
Alumina foam bricks are suitable for applications up to 1700 ℃. These bricks have excellent insulating properties and high thermal strength. Alumina bubble brick is a tiny hollow insulating sphere made of high-purity alumina (also called bubble alumina). Aluminum oxide does not show high thermal conductivity, and its thermal conductivity will be additionally reduced when it is in the form of hollow spheres. These two characteristics make the bubble alumina brick an excellent insulating material, which can withstand extremely high temperatures.
Performance characters of alumina bubble bricks
- High porosity.
- Small bulk density.
- High mechanical strength.
- The thermal conductivity is small.
Application of alumina bubble bricks
Bubble alumina brick is a tiny hollow insulating sphere made of high-purity alumina (also called bubble alumina).
Parameters of alumina bubble bricks
| Alumina Bubble brick | Al2O3 | Bulk Density | C.C.S | P.L.C(%) | Thermal Conductivity | R.U.L |
| - | (%) | (g/cm3) | (MPa,Min) | 1600℃*3h | (W/mk) | (0.2MPa,℃) |
| KR-90 | 90 | 1.1 | 10 | ±0.3 | 0.8 | 1650 |
| KR-90 | 90 | 1.3 | 12 | ±0.3 | 0.8 | 1700 |
| KR-95 | 95 | 1.5 | 12 | ±0.3 | 0.7 | 1750 |