Bubble Alumina Brick
2.Mixing, drying, forming, firing at the temperature of 1700 °C shuttle kiln.
Technical data sheet
|
Item |
85 |
90 |
99 |
|
Al2O3/% |
≥85 |
≥90 |
≥99 |
|
SiO2 /% |
≤14 |
≤9 |
≤0.3 |
|
Fe2O3/% |
≤0.2 |
≤0.2 |
≤0.2 |
|
Bulk density/g.cm3 |
1.4-1.9 |
1.4-1.9 |
1.5-1.8 |
|
Cold crushing strength/Mpa |
≥18 |
≥18 |
≥15 |
|
(0.1MPa,0.6%)Refractoriness under load/°C |
≥1700 |
≥1700 |
≥1700 |
|
(1600 °C,3h)Reheating Linear Change/% |
±0.3 |
±0.2 |
-0.25 |
|
(Room temp-1300°C) Thermal expansion coefficient/×10-6 |
7.8 |
8.0 |
8.6 |
|
Average 800°C Thermal conductivity/ W/(m.k) |
0.55 |
0.6 |
0.75 |
|
Max service temperature/°C |
1750 |
1800 |
1800 |
Feature
1.High temperature resistance.
2.Low thermal conductivity.
3.Good thermal insulation.
4.High strength.
5.Can direct contact with high temperature flame.
6.Low bulk density.
Application
Bubble alumina bricks are widely used in metallurgy,chemical industry,glass,ceramics,refractory materials and other industries as furnace linnings and insulation materials of ultra-high temperature kilns.
