Grand级别

成份

Composition

Class A

Class B

Class C

Class D

ZrO2

≥66%

≥65%

≥63%

≥60%

Fe2O3

≤0.08%

≤0.10%

≤0.25%

≤0.25%

TiO2

≤0.10%

≤0.10%

≤0.25%

≤0.25%