Alumina

Aluminium oxide (British English) or aluminum oxide (American English) is a chemical compound of aluminium and oxygen with the chemical formula Al2O3. It is the most commonly occurring of several aluminium oxides, and specifically identified as aluminium(III) oxide.

S.NO CHARACTERISTICS VALUE
1 Principal Constituent Al2O3 Purity >99.9% Al2O3
2 Tolerance +/-2%
3 Sintering Additives Nil
4 Appearance Pearl White
5 It is optically transparent in the near-ultraviolet, visible and infrared regions Nil
6 Apparent Density >3.89 g/cc
7 Grain Size ~10 µm
8 Open Porosity Nil
9 Hardness (Knoop 100g) 23000 MPa
10 Compressive Strength 3500 MPa
11 Bending Strength 300 MPa
12 Modulus of Elasticity 380 GPa
13 Melting Point 2030oC
14 Maximum Working Temperature 1800oC
15 Specific Heat 900J/KgK
16 Thermal Conductivity at 100oC 30 W/mK
17 Thermal Conductivity at 1000oC 5 W/mK
18 Coefficient of Linear Expansion between 0-1000oC ~8.5 x 10-6/K
19 Emissivity at 1000oC ~21%
20 Surface Finish 3 triangle or better

New products

  • HA CYC 5
    HA CYC 5

    Cylindrical Shape Alumina Crucibles with outer diameter 20 mm with a thickness of 2.5 mm, height of 30mm and a storage volume of 5 CC.

  • HA CYC 10
    HA CYC 10

    Cylindrical Shape Alumina Crucibles with outer diameter 30 mm with a thickness of 2.5 mm, height of 30mm and a storage volume of 10 CC.