Ultra AAP™
ULTRA-HIGH PURITY ALPHA PHASE ALUMINA (Al₂O₃) POWDER
Our Ultra-High Purity Alpha Phase Alumina Powder (Ultra AAP™) is a finely engineered product with a guaranteed purity of over 99.995% to meet the diverse needs of modern industries.
Our Ultra AAP™ is designed with superior quality and precision in mind. With bespoke particle-sizing and customisable specific surface areas, this product caters to the specific requirements of our clients across various high-tech industries.
UNITS | ULTRA AAP™ | |||
Description | Ultra-High Purity Alpha Phase Alumina | |||
Chemical Formula | Al₂O₃ | |||
Crystal Structure | α | |||
Purity | % | 4N5 - 99.995% | ||
Uranium (U) & Thorium (Th) | ppb | < 1 | ||
Processing | Milled or Unmilled | |||
Particle Size Distribution (PSD) | d50 | 1 - 2μm | 3 - 4μm | 6 - 8μm |
Loose Bulk Density | g/cm³ | 0.4 - 0.5 | 0.4 - 0.5 | 0.5 - 0.7 |
Tapped Bulk Density | g/cm³ | 0.6 - 0.8 | ||
Specific Surface Area (BET) | m²/g | 4 - 8 | ||
Impurity Panel (76 elements - GDMS) | < 40 PPM | |||
SEM IMAGERY
UNMILLED
MILLED


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THE VERSATILITY OF OUR
ULTRA AAP™ FOR INDUSTRY APPLICATIONS
Our Ultra AAP™ is the ideal precursor material for thermal interface materials (TIMs) due to our industry leading purity, ability to remove radio-nuclide impurities (Uranium and Thorium) to < 1 ppb and excellent thermal conductivity and electrical insulation.
Our Ultra AAP™ is used extensively in the production of sapphire substrates for LED lighting, micro-LED as well as UV-LEDs for sterilisation and water purification. Additionally, our Ultra AAP™ is used for the production on LED phosphors by converting the emitted blue or ultraviolet light into white light.
HPA is an essential component in lithium-ion batteries, ensuring the stability and longevity of the battery separator and anode coating. Our Ultra AAP™ supports higher battery performance, enhanced energy efficiency, and extended battery life, which are vital for the rapidly expanding EV market.
Our ability to provide bespoke particle sizing for together with industry leading purity and ultra low sodium (Na) and potassium (K) levels make our Ultra AAP™ the ideal material for outperforming CMP (Chemical Mechanical Planarization) slurry abrasives.
Our Ultra AAP™ can be customised for most applications in advanced technical ceramics, to optimise sintering performance, hardness, wear resistance, thermal stability and electrical insulation. Please submit an enquiry to find out more.
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Contact us today to discuss your project needs and how Alpha HPA’s products can provide the solution for your manufacturing requirements.






