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Products/Technical Ceramic Products:
 
Alumina - Typical Characteristics

92 % Al2O3

  • High Hardness
  • Good Wear Resistance
  • Very Low Electrical Conductivity
  • High Corrosion Resistance
  • High Oxidation Resistance
  • Low Tensile Strength

95 % Al2O3

  • High Hardness
  • Resistance to Slag attack
  • High Bending Strength
  • Resistance to Dynamic Wear
  • Resistance to Abrasion

99.8 % Al2O3

  • Excellent Thermal Stability
  • Good Corrosion Resistance
  • Good Thermal Shock Resistance
  • Resistance to Acid and Basic Slag
  • Good Hardness and Wear Resistance
  • High Durability
  • Low Dielectric Constant and Loss Tangent
  • Inert to hydrogen, carbon and refractory metals under most severe conditions like non-toxic, non-reactive, non-magnetic & non-aging.

 

 
Property Details

 

Particulars

Units

Al2O3
92%

Al2O3
95%

Al2O3
99.80%

Physical

Density

gm / cc

3.72

≥ 3.76

≥ 3.90

Porosity

%

Nil

Nil

Nil

Colour

 

White

White / Pink

Ivory

Mechanical

Flexural Strength

Kg / Cm2

3200

3250

2800 - 3000

Compressive Strength

Kg / Cm2

20000

21400

25500

Hardness (Vickers)

HV10

1250-1300

1500

1550 - 1600

Thermal

Thermal Shock Resistance

Deg C

160

160 - 180

200

Thermal Conductivity

W/m Deg C

24

24

24 - 26

Co-efficient of Thermal
Expansion

x 10-6 / Deg C

7.6

8.8

8.4

Maximum Use Temperature

Deg C

1400

1450

1800

Electrical

Dielectric Constant

MHz

8.6

9.1

9.8

Dielectric Strength

KV / mm

25

25

25

Electrical Resistivity, 25 Deg C

Ω-Cm

≥ 1013

≥ 1013

1014

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