Wear Resistant Alumina Ceramic Cylinder Tube

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Product Description:

Alumina is the most well-known and most commonly used fine ceramic material. It has the same sintered crystal body as sapphire and ruby. It has been used for decades in electrical components for its high electrical insulation, and is widely used in mechanical parts for its high strength, and corrosion- and wear-resistance.

Properties

Units

Alumina(Al2O3)

Porous

Mullite

Al2O3 92%

Al2O3

96%

Al2O3  99%

Al2O3 99.5%

Al2O3

Mechanical

Density

g/cm3

2.8

3.6

3.7

3.9

3.9

Color

——

——

Tan

White

White

Ivory

Ivory

Water Absorption

%

0

0

0

0

0

Vickers Hardness

Gpa

——

7.4

11

11.5

13

14

Flexural Strength       (20°C)

Mpa

50~100

170

345

358

380

380

Compressive Strength           (20°C)

Mpa

20~100

550

2200

2300

3000

3000

Thermal

Thermal Conductivity   (20°C)

W/m.K

3.1

3.5

16.7

24.8

25~35

25~35

Thermal Shock Resistance       (20°C)

ΔT(C)

——

300

250

250

200

200

Maximum Use Temperature

°C

1900

1700

1500

1600

1700

1700

Electrical

Volume Resistivity       (25°C)

Ω.cm

——

>1014

>1014

>1014

>1014

>1014

Excellent electrical insulation
Relatively low strength and fracture toughness
Resistance to wear and corrosive
Excellent thermal stability
Resistance to high temperatures
High electrical resistivity
Good chemical stability
High corrosion resistance

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