Molecular weight分子量

78

Mohs hardness

摩氏硬度

3

Density g/cm³

密度

2.4

Ratio of refraction

折光率

1.58

Item                    Model

HJM-7

HJM-8

HJM-8SMC

Chemical constituent

化學成分

Al(OH)3  [%]        ≥

99.7%

99.7%

99.7%

Al₂O₃    [%]          ≥

64.5

64.5

64.5

SiO₂     [%]        ≤

0.05

0.05

0.05

Fe₂O₃    [%]       ≤

0.01

0.01

0.01

Na₂O    [%]        ≤

0.30

0.30

0.30

Loss on ignition 灼減 ≤

35.0

35.0

35.0

Attached water水分  ≤

0.4

0.30

0.30

+325 mesh  325目篩上≤

0.01

0.5

0.5

oil absorption 吸油率  ≈

23

21

19

Mean particle diameter粒度（D50） μ m   

6-9

7-10

8-11

Whiteness白度     [R457]         ≥

97

95

95

PH value PH值

10.0±1.5

Notes: In this specification, the mean particle size can also be produced according to customer's requirements. 備注：可根據客戶要求調整產品粒度