AD-996

Note: This is a variation of Dense Ceramics – Alumina, Mullite, & Zirconia (3200ºF – 3600ºF Range).

Fully Dense Porcelain, Mullite, Alumina, Zirconia, Silicon Carbide, and Tungsten Carbide are gas-tight high-fired ceramics capable of withstanding operating temperatures of 2550ºF (1400ºC) to 3182ºF (1750ºC). These compositions are available in the forms of extruded and cast tubing, rods, plates, fish spine beads, lab ware, and custom molded shapes.

Specifications

CompositionNom. 99.5% Al2O3
Density ( g/cc )3.90
Average Crystal Size ( Microns )6
Gas Permeability0
ColorIvory
Flexural Strength (MOR) at 20ºC ( MPa )379
Flexural Strength (MOR) at 20ºC ( psi )55 x 103
Elastic Modulus at 20ºC ( psi )54 x 103
Elastic Modulus at 20ºC ( GPa )370
Poisson's Ratio at 20ºC0.22
Compressive Strength at 20ºC ( MPa )2600
Compressive Strength at 20ºC ( psi )377
Knoop Hardness at 1000gm ( kg/mm² )1440
Knoop Hardness at 1000gm ( GPa )14.1
Rockwell Hardness at 45 N83
Tensile Strength at 25ºC ( MPa )262
Tensile Strength at 25ºC ( psi )38 x 103
Fracture Toughness K(Ic)4 to 5 MPa m1/2
Thermal Conductivity at 20ºC ( W/m-ºK )30.0
Coefficient of Thermal Expansion at 25-1000ºC ( Per ºC )8.2 x 10-6
Specific Heat at 100ºC ( J/kgºK )880
Thermal Shock Resistance ΔTc ( ºC )200
Maximum Use Temperature ( ºC )1750
Dielectric Strength ( ac-kV/mm )8.7
Dielectric Strength ( ac V/mil )220
Dielectric Constant at 1 MHz & 25ºC9.7
Dielectric Loss (tan delta) at 1 MHz & 25ºC0.0001
Volume Resistivity at 25ºC ( ohm-cm )>1014
Volume Resistivity at 500ºC ( ohm-cm )2 x 1010
Volume Resistivity at 1000ºC ( ohm-cm )2 x 106
Impingement0.47
Water Absorption ( % )0
MaterialAlumina
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