99% Al2O3 Ceramics

99% Al2O3 Ceramics

99% Al2O3 Ceramics 99% Al2O3 Ceramics are extensively used as motor shafts, nozzle, bushing, bearing,guides and rollers in mechanical and textile industry with its excellent hardness and wear-resistance. 99% Al2O3 Ceramics specifications Specifications of 99% Al 2 O 3 ceramic

99% Al2O3 Ceramics

99% Al2O3 Ceramics are extensively used as motor shafts, nozzle, bushing, bearing,guides and  rollers in mechanical and textile industry with its excellent hardness and wear-resistance.

99% Al2O3 Ceramics  specifications

AL2O3

99%

MgO

0.8%

Na2O

<0.15%

SiO2

<0.018%

Y2O3

<0.02%

Fe2O3

<0.02%

TiO2

<0.006%

CaO

<0.005%

Specifications of 99% Al2O3 ceramic

Items

Test condition

Unit

Average grain size

µm

3 - 5

Density

g/cm3

=3.85

Water absorption

%

0

Hardness (Vickers)

HV0.5

=1900

Flexual strength

Distance between bending points 80mm

MPa

=340

Compressing strength

MPa

3600

Linear thermal expanding coefficient

20-500?

1x106 mm/?

6.5 – 7.5

20-800?

6.5 - 8.0

Thermal conductivity

20?

W/(m.K)

=24

Dielectric strength

KV/mm

=12

Volume resistivity

300?

O.cm

=1011

Dielectric constant

1MHz

9.3-10.6

Dielectric loss

1MHz

3x10-4

Thermal shock resistance

850?

times

=7

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