99.7% Alumina (Al₂O₃)

Characteristics

Item

Value

Unit

Mechanical Characteristics

Colour

Iory

Density

3.91

g/cm³

Bending Strength

370

MPa

Compressive Strength

2,500

MPa

Elastic Modulus

390

GPa

Fracture Toughness

4

MPam^1/2

Weber Coefficient

12

M

Vickers Hardness

1,800

HV0.5

Thermal Characteristics

Coefficient of Line Thermal Expansion

7~8

10^-6K^-1

Thermal Conductivity

32

W/mK

Thermal Shock Resistance (Put in Water)

280

?T°C

Max Working Temperature

1,700

°C

Electrical Characteristics

Volume Resistance at 20°C

>10¹⁴

?cm

Dielectric Strength

15×10⁶

V/m

Dielectric Constant

10

ε_r

One MHZ Dielectric Loss Angle at 20°C

0.0001

tanδ

Chemical Characteristics

Nitric Acid (60%) 90°C

0.05

WTLossmg/cm²/day

Sulphuric Acid (95%) 95°C

0.22

Caustic Soda (30%) 80°C

0.04