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Aluminum Oxide Ceramic

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Alumina is historically the most cost-effective and widely used engineering ceramic. It has a good combination of properties:

 

· Good hardness and wear resistance

· High strength and stiffness

· Good thermal stability

· Almost chemically inert

 

Alumina can be produced in purity ranges from 95% up to 99.5% (available in ivory color), for various applications.

 

Parameter

Unit

99.5% Al2O3

99% Al2O3

Density

g/cm 3

3.9

3.88

Hardness

Rockwell

HRA 86

HRA 85

Compressive Strength

MPa

2100

2000

psi

304, 500

290, 000

Flexural Strength

MPa

350

310

psi

51, 000

45, 000

Elastic Modulus 

GPa

360

330

psi

52 x 10 6

48 x 10 6

Thermal Conductivity

W / m K

29

26

Coefficient of

1 x 10 -6 / K

8.2

8.2

Thermal Expansion

 


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