Category

Size

Size range (μm)

Category

Size

Size range (μm)

Micropowder

W63

63-50

Fine micro powder

W3.5

3.5-2.5

W50

50-40

W40

40-28

W28

28-20

W2.5

2.5-1.5

W20

20-14

W14

14-10

W1.5

1.5-1.0

W10

10-7

W7

7-5

W1

1.0-0.5

W5

5-3.5

α-alumina micropowder properties: high activity, small crystalliteparticle, high phrase-transfermation ratio, etc.

Properties/designation

AW-4M

AW-12M

AW-07M

Chemical compostion %

Al₂O₃

≥99

≥99

≥99

Na₂O

≤0.3

≤0.3

≤0.1

SiO₂

≤0.2

≤0.2

≤0.2

Fe₂O₃

≤0.1

≤0.1

≤0.1

Major crystal phrase

αAl₂O₃

αAl₂O₃

αAl₂O₃

Medium diameter (μm)

40607

1-1.5

0.6-0.7

Real density (g/cm³)

≥3.95

≥3.95

≥3.95

Test standard

GB/T3044-2007