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ITEM

UNIT

99.9 ALUMINA

Density

G/cm3

3.94

Bending Resistance

Mpa

500

Compressive Strength

Mpa

3300

Elasticity Modulus

Gpa

400

Shock Strength

Mpam/2

5.2

Vaporization Coefficient

M

12

Vickers Hardness

HV0.5

2000

Thermal Expansivity

10-6K-1

8.0

Conductivity

W/MK

28

Thermal Shock Resistance

AT℃

280

Maximum Service Temperature

℃

1750

20℃ Volume Resistance

Ω

≥1015

Dielectric Strength

KV/mm

30

Apparent Porosity

％

0

Permittivity

Er

10

Dielectric Loss Angle

tanδ

0.001

ITEM

LS-110

LS-120

LS-130

LS-110F

LS-220

LS-210

LOI(％)

0.02

0.02

0.05

0.08

0.03

0.01

Na2O(％)

0.05

0.04

0.03

0.05

0.07

0.08

SiO2(％)

0.07

0.07

0.07

0.09

0.02

0.02

Fe2O3(％)

0.03

0.03

0.03

0.03

0.02

0.02

Al2O3(％)

99.9

99.9

99.9

99.9

99.9

99.9

average grain diameter(um)

1.7

2.1

2.2

1.1

2.7

2.9

αgrain diameter(um)

1-2

1-3

2-4

1-2

2-3

3-5

BET Surface Area(m2/g)

1.9

1.4

1.4

3.2

1.6

0.9

Pressure-induced volume density(g/cm3)*

2.22

2.27

2.31

2.29

2.22

2.32

Forming density(g/cm3)**

2.13

2.20

2.23

2.33

2.17

2.30

Sintering volume density(g/cm3)**

3.78

3.79

3.78

3.89

3.81

3.77

Line collection efficiency(％)

18.0

17.2

16.7

15.7

17.5

15.3