Activated alumina balls (beads) are porous aluminum oxide desiccants engineered with high specific surface area and controlled pore structure. They remove moisture from compressed air and process gases, protect PSA/VPSA units, and adsorb contaminants such as fluoride and arsenic from water.
Activated Alumina Balls Advantages
- Stable drying performance: Maintains moisture pickup and regenerability across cycles; supports −40 °C PDP targets in standard desiccant dryers.
- Mechanical robustness: High crush strength and low dust generation minimize valve fouling and filter loading.
- Chemically clean: Neutral surface, suitable for fluoride/arsenic adsorption after proper conditioning; compatible with common compressor oils and gas constituents.
- High Adsorption Capacity: A porous structure with a surface area over 320 m²/g ensures efficient moisture and contaminant removal, achieving pressure dew points as low as -40°C.
- Mechanical Integrity: High crush strength (≥140N) and low attrition (<0.1%) prevent dusting and bed breakdown during pneumatic loading and high-pressure operation, extending service life.
Activated Alumina Bead Ball Properties
| Property | Unit | 99.7% Al₂O₃ | 99.5% Al₂O₃ | 99% Al₂O₃ | 96% Al₂O₃ |
| Color | Ivory White | Ivory White | Ivory White | Ivory White | |
| Density | g/cm³ | 3.94 | 3.9 | 3.83 | 3.6-3.75 |
| Water Absorption | % | 0 | 0 | 0 | 0 |
| Hardness | Mohs Hardness | 9.1 | 9 | 9 | 8.8 |
| Flexural Strength (20°C) | Mpa | 330 | 320 | 300 | 260 |
| Compressive Strength (20°C) | Mpa | 2300 | 2300 | 2210 | 1910 |
| Maximum Operating Temperature | °C | 1730 | 1700 | 1680 | 1450 |
| Thermal Expansion Coefficient(25°C to 800°C) | 10⁻⁶/°C | 7.6 | 7.6 | 7.6 | 7.6 |
| Thermal Conductivity (25°C) | W/(m·K) | 29 | 27 | 24 | 22 |
| Dielectric Strength (5mm thickness) | AC-kv/mm | 22 | 21 | 19 | 15 |
| Dielectric Loss at 25°C@1MHz | --- | < 0.0001 | < 0.0001 | 0.0003 | 0.0004 |
| Dielectric Constant at 25°C@1MHz | --- | 9.8 | 9.7 | 9.5 | 9.2 |
| Volume Resistivity (20°C) | Ω·cm³ | >10¹⁴ | >10¹⁴ | >10¹⁴ | >10¹⁴ |
| Volume Resistivity (300°C) | Ω·cm³ | 2*10¹² | 2*10¹² | 4*10¹¹ | 2*10¹¹ |
Activated Alumina Balls Specifications

| Activated Alumina Balls | |||
| Item No. | Diameter (mm) | Purity (AI203%) | Tolerance |
| AT-YM-H001 | 0.5 | 93 | ±0.2 |
| AT-YM-H002 | 1 | 93 | ±0.5 |
| AT-YM-H003 | 2 | 93 | |
| AT-YM-H004 | 3 | 93 | ±1.0 |
| AT-YM-H005 | 4 | 93 | |
| AT-YM-H006 | 5 | 93 | |
| AT-YM-H007 | 6 | 93 | |
| AT-YM-H008 | 7 | 93 | |
| AT-YM-H009 | 8 | 93 | |
| AT-YM-H010 | 9 | 93 | |
| AT-YM-H011 | 10 | 93 | ±1.5 |
| AT-YM-H012 | 11 | 93 | |
| AT-YM-H013 | 12 | 93 | |
| AT-YM-H014 | 13 | 93 | |
| AT-YM-H015 | 14 | 93 | |
Activated Alumina Oxide Ball Packaging
- High alumina balls are packaged in 25 kg heavy-duty plastic bags, which are then placed inside 1-ton jumbo bags with inner waterproof liners. The jumbo bags are palletized and shrink-wrapped for secure, moisture-free international transport.







