location : Products >>ABRASIVE MATERIAlS >> Physical characteristics

   
Physical characteristics
 

Item

Brown
Aluminum Oxide

White
Aluminum Oxide

Pink
Aluminum Oxide

Black
Silicon Carbide

Green
Silicon Carbide

Basic mineral

α-Al2O3

α-Al2O3

α-Al2O3

α-SiC

α-SiC

Crystal system

Hexagonal

Hexagonal

Hexagonal

Hexagonal

Hexagonal

Crystal color

Brown

White

Pink

Black

Green

Density

3.90g/cm3

3.90g/cm3

3.90g/cm3

3.12g/cm3

3.18g/cm3

Mohs hardness

9

9

9

9.15

9.15

Micro hardness

HV1800-2200

HV2200-2300

HV2200-2300

HV3100-3280

HV3280-3400

Grinding ability
(compared with
diamond as one)

0.10

0.12

0.12

0.25

0.28

linear expansion
coefficient(when
900
α·10-6k-1)

7.6

8.3

8.3

4.4

4.6

Electrical resistivity  

10141016Ω· cm


3×105
3×107Ω· cm


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