Item

Standard Value

Test Value

Al₂O₃(%)

≥99

99.74

Fe₂O₃ (%)

≤0.05

0.02

SiO₂(%)

≤0.10

0.03

Na₂O(%)

≤0.15

0.07

D50(μm)

≤3.00

2.38

D90(μm)

≤10.00

8.90