Parameters of Alumina and Alumina Hollow Ball Insulation Bricks

Alumina insulation bricks are treated by foam insulation, casting molding and high temperature firing. Hollow ball alumina insulating bricks are made from melt blowing alumina hollow ball with compound binding agent and shaped by vibration, high temperature firing. Both of them have small thermal conductivity, high load softening temperature, less reheating linear change, which are widely used in insulation lining work or flame contact kiln and precision thermal equipment.
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Alumina insulation bricks

Technical Parameters:

Item	Alumina insulation bricks			Hollow ball alumina insulating bricks
Al2O3%	≥80	≥85	90	≥95	≥97	≥98
Fe2O3%	≤0.5	≤0.5	≤0.5	≤0.4	≤0.4	≤0.4
Bulk Density g/cm3	≤0.6	≤0.8	≤1.0	≤1.2	≤1.4	≤1.6
Cold crushing Mpa	≥2.0	≥3.0	≥4.0	≥3.0	≥10	≥12
Reheating Linear Change %1600℃×2h	≤0.5	≤0.5	≤0.5	≤0.4	≤0.4	≤0.4
Thermal Conductivity w/m 350℃	≤0.7	≤0.6	≤0.5	≤0.4	≤0.3	≤0.3
Maximum temperature ℃	1500	1550	1600	1600	1650	1700

LINKS: Alumina Bubble Brick | High Alumina Brick | Alumina Hollow Ball | Aluminum Powder | Aluminum Hydroxide