Item

99BA

90BA

Max service temperature            ℃      

1750

1750

Bulk Density                      g/cm³

1.55-1.8(±0.05)

1.5-1.9(±0.05)

Cold Crush Strength                Mpa

≥12

≥15

Thermal Conductivity(Average 800℃)  W/m.k 

0.75

0.6

Refractoriness under load(0.1MPa,0.6%)   ℃

≥1700

≥1700

Reheating linear change(1600℃x3h)    %

±0.3

±0.3

Thermal expansion coefficient(Room temp-1300℃)

~8.6

~8

Al2O3                            %

≥99

≥90

SiO2                             %

≤0.3

≤9

Fe2O3                            %

≤0.2

≤0.2