DURALOX 997 ALUMINA CERAMIC MICRO BEADS
DURALOX 997 ALUMINA CERAMIC MICRO BEADS
99.7% High Purity Alumina Ceramic MICRO BEADS For uniform smooth sintering of Zirconia Dental restoratives.
Duralox 997 spherical micro beads are produced from proprietary formulated, high purity Alumina ceramic composite, which contains 99.7% Alpha alumina cystals with negligible percentage of Silica in its body composition.
Duralox 997 beads are sapphire hard, tough, abrasive in nature and suitable to withstand high temperature. Duralox 997 beads are 9 on Mohs scale in hardness, chemically inert, non-radioactive, free of voids, have dense homogenous internal microstructure and are smooth in surface finish. Ideal for sintering of Zirconia restoratives on the bed of beads in the sagger, Duralox 997 micro beads smoothly adapt to the shape of the Zirconia restoration and allow the unit to shrink without any deformation.
Bead standard fraction range size: 0.4 to 0.7mm, 0.7 to 1.2mm, 1.2mm to 1.7mm, 1.7mm to 2.4mm, 2.4 mm to 2.8 mm, 2.8 mm to 3.3 mm. Special bead size can be catered on request.
We can also offer custom fraction size beads, if found feasible for production.
Physical Properties
| Composition | 99.7% Al2O3 |
| Colour | Off White |
| Average crystal size | 2-7 Micron |
| Density | 3.95±0.05 gms/cc |
| Bulk Density | 2.35±0.05 kgs/ltr |
| Porosity | Nil |
| Water absorption | Nil |
| Hardness on Moh`s scale | 9+ |
| Hardness on Vicker' s scale (Hv10) | 1600 |
| Compressivestrength | 3300 Mpa |
| Crushing strength (∅ 2mm bead) | 100-110 kgf |
| Flexural strength (250C) | 3700 kg/cm2 |
| Modulus of elasticity | 3.5 x 106 kg/cm2 |
| Flexural temperature | >20000C (36320F) |
| Maximum use temperature (No load condition) | >17500C (31820F) |
| Co-efficient of thermal expansion | 8.4 x 10-6 / 0C |
| Thermal conductivity (200C | 28 W/m/0K |
Chemical Properties
| Al2O3 | 99.7% |
| MgO | 0.15% |
| Others | 0.15% |
| ∅ 0.4 to ∅ 0.7 mm | ∅ 0.7 to ∅ 1.2 mm |
| ∅ 1.2 to ∅ 1.7 mm | ∅ 1.7to ∅ 2.4 mm |
| ∅ 2.4 to ∅ 2.8 mm | ∅ 2.8 to ∅ 3.3 mm |
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We also offer custom fraction size beads, if found feasible for production. |
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