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Hollow Alumina Sphere Bricks

Chinese Name:氧化铝空心球制品
Product Features:Hollow alumina sphere bricks use the hollow alumina sphere, corundum powder, calcined powder as raw material, through Homogenization, molding, high temperature sintering.
Product Details

CharacteristicsHollow alumina sphere bricks use the hollow alumina sphere(bubble alumina), corundum powder, calcined powder as raw material, through Homogenization, molding, high temperature sintering. High temperature resistance, low thermal conductivity, good thermal insulation, good chemical stability (acid-base erosion resistance), low bulk density (lighter than the same kind of material, thin kiln wall, low cost).

ApplicationWidely used in inner linings of various non-contacted melt high temperature kiln and thermal insulating layers of high temperature kilns.

 

Specifications

index    name

MLQ84

MLQ90

LQ-1.2

LQ-1.5

LQ-1.7

LQ-2.0

Al2O3%≥

84

90

98.5

98.5

98.5

98.5

Fe2O3%≤

0.8

0.5

0.3

0.3

0.3

0.3

SiO2%≤

15

9

1.0

1.0

1.0

1.0

g/cm3

Bulk Density

1.5

1.5

1.2

1.5

1.7

2

MPa≥

Compressive Strength at Normal Temperature

16

15

3

12

15

20-25

%≥

Porosity

58

60

62

60

58

52

Soften Point at 0.1MPa Load

1650

1700

1700

1700

1700

1700

Refractoriness

1800

1800

1800

1800

1800

1800

W/m·K(1000)

Thermal Conductivity

1.2

1.15

0.95

1.05

1.15

1.2

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