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Technical Analysis Table

Classification

Ultra High Temperature

UTR

UTR-99

UTR-91

Chemical

Composition

(%)

AL2O3 

99.0

91.0

SiO©ü 

0.7

8.7

Fe2O3

0.3

0.3

Refractoriness(¡ÆC)

1910

1880

Refractoriness under load,

0.5MPa, (¡ÆC)

1800

1720

Apparent porosity (%)

14

18

Bulk density (g/cm©ø)

3.2

3.0

Cold crushing strength (MPa)

87

87

Thermal expansion at 1400¡ÆC (%)

0.1

0.2

The recommended

temperature (¡ÆC)

1800

1700