The sizes of the tile may be either 150mm x 150mm x 6mm (thickness) or 150mm x 150mm x 12mm (thickness). The alumina content is of 92% alumina. For more details, see below.
Alumina High Density Technical Data Sheet
| Property | Units | 99.7% Alumina |
95% Alumina |
92% Alumina |
ZTA |
| Description | Zirconia Toughened Alumina |
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| Nominal Composition | α Alumina (99.7%) |
α Alumina (95%) |
α Alumina (92%) |
80% AI2O3 + ZrO2 |
|
| Microstructure | |||||
| Density | g/cm3 | 3.90 | 3.65 | 3.60 | 4.4 |
| Water Absorption | % | 0 | 0 | 0 | 0 |
| Porosity | Vol% | 0 | 0 | 0 | 0 |
| Colour | Cream | White | White | Cream/White | |
| Mechanical Properties | |||||
| Compressive Strength | MPa | 2600 | 1960 | 2500 | 2900 |
| Flexural (Bending) Strength (@20°C) | MPa | 550 | 408 | 340 | 650 |
| Young’s Modulus E | GPa | 380 | 300 | 280 | 320 |
| Fracture Toughness | MPa.m1/2 | 4 | 3 | 3.5 | 5.8 |
| Vickers Hardness | kg/mm2 | 1600 | 1300 | 1180 | 1480 |
| Thermal Properties | |||||
| Max Working Temperature | °C | 1800 | 1600 | 1000 | 1500 |
| Thermal Conductivity (@20°C) | W/mK | 38 | 18 | 16 | 16 |
| Thermal Expansion Coefficient | x10-6/K | 8.4 | 7.2 | 8 | 9.0 |
| Thermal Shock Resistance Δ( Tc) | °C | 200 | 250 | 250 | 300 |
| Electrical Properties | |||||
| Specific Resistance (@20 °C) | Ω cm | >1014 | >1014 | >1014 |