Alumina powder

Alumina powder is a ceramic of chemical composition Al₂O₃. The structure, the purity, the hardness and the specific surface area are the main characteristics of these powders.

The differences between the products may seem minimal but the physico-chemical properties between two ranges are completely different. The calcination time varies from one range to another, while some alumina are harder, others softer. The granulometry and distributions are also different.

Our wide range of alumina powder will allow you to select the product best suited to your application. Sintering, filling and polishing powders are available. A specific powder to prevent parts sticking during heat treatment is also available.

For specific grain sizes, we can offer customised sieving. Please get in touch.

Main Products alumina powder

100 Series: Alumina of medium purity, very high hardness, very low porosity and very low surface area.

• Chemical analysis: Al₂O₃ > 99.7% Na₂O < 0.2%
• Granulometry: d50 between 1.5μm and 2.35mm
• Applications: Precision honing and polishing - Precision Sandblasting/Micro sandblasting - Compressed air surface treatment - Electrical insulation

200 Series: Alumina of high purity and hardness, low porosity and a specific surface area.

• Chemical analysis: Al₂O₃ = 99.85% Na₂O = 0.06%-0.08%
• Granulometry: d50 between 3μm and 80μm
• Filler for synthetic resins - Filler for elastomers

300 Series:

This series is a little less pure than the 200 series and the specific surface area is a little larger. However, the product 007-0320 is much purer than the other alumina from the 300 and 200 series because it is specially made to measure to prevent smaller parts sticking during heat treatment.

• Chemical analysis: Al₂O₃ = 99.7% Na₂O = 0.1%
• Granulometry: d50 = 0.50μm till 80μm
• Filler for synthetic resins - Filler for elastomers - Anti-stick agent

400 Series: Alumina of medium purity but with a very specific large surface area.

• Chemical analysis: Al2O3 = 99.6% Na2O = 0.3%
• Granulometry: d50 between 0.6μm and 80μm
• Incorporated with certain paints or inks, these alumina make it possible to obtain a particularly hard coating. The fineness of the alumina you use depends on the thickness of the layer of paint or ink.

500 Series: Alumina of lower chemical purity than previous series with a medium surface area.

• Chemical analysis: Al₂O₃ = 99.6% Na₂O = 0.3%
• Granulometry: d50 between 3μm and 60μm
• Filler for synthetic resins - Filler for elastomers

600 Series: Polishing alumina of rather low purity but with the technical characteristics needed for the different stages of polishing.

• Chemical analysis: Al₂O₃ = 99.6% Na₂O = 0.3%
• Granulometry: d50 between 3μm and 60μm
• Common or special industrial sanding/polishing

900 Series: Alumina granules with a large specific surface area, of medium purity and low hardness.

• Chemical analysis: Al₂O₃ = 90% till 99.5%
• Granulometry: d50 between 0.3mm and 10mm
• Filtration, purification

1000 Series: Alumina with a medium surface area, high purity and medium hardness.

• Chemical analysis: Al₂O₃ = 99.6% till 99.8%
• Granulometry: d50 = 0.05μm till 3μm
• Metallographic and mineralogical polishing

1100 Series: Alumina with low surface area, high purity and low hardness.

• Chemical analysis: Al₂O₃ > 99.8%
• Granulometry: d50 = 10μm till 80μm
• Precision polishing

1400 Series: Filling alumina.

• Chemical analysis: Al₂O₃ > 99.6%
• Granulometry: d50 = 150μm
• Electrical resistance filling

2000 Series: Alumina with a medium surface area, high purity and medium hardness.

• Chemical analysis: Al₂O₃ = 99.8%
• Granulometry: d50 = 0.4μm till 80μm
• Filler for wear resistance, electrical insulation, electronic components, porous ceramics, catalyst support

4000 Series: Alumina with a low surface area, medium purity and high granulometry-controlled hardness.

• Chemical analysis: Al₂O₃ = 99.8%
• Granulometry: d50 = 80μm till 118μm
• Micro sandblasting and micro polishing

5000 Series: γ-Alumina with a medium specific surface area, very high purity, low hardness.

• Chemical analysis: Al₂O₃ = 99.99%
• Granulometry: d50 = 0.5μm till 10μm and 0.6μm till 20μm
• Special high purity filler

5100 Series: Alumina with a high specific surface area, medium purity and high hardness.

• Chemical analysis: Al₂O₃ > 99.5%
• Granulometry: d50 = 0.7μm till 90μm
• Special filler for synthetic resins and elastomers

5200 Series: Alumina with a specific surface area, medium purity and medium hardness.

• Chemical analysis: Al₂O₃ = 99.7% till 99.85%
• Granulometry: d50 = 0.65μm till 80μm
• Sanding and polishing

5300 Series: Alumina with low surface area, high purity and high hardness.

• Chemical analysis: Al₂O₃ = 99.85%
• Granulometry: d50 = 3μm
• Special filler for synthetic resins and elastomers

5400 Series: Alumina with a low specific surface area, high purity and high hardness.

• Chemical analysis: Al₂O₃ = 99.60%
• Granulometry: d50 = 0.6μm
• Special filler for synthetic resins and elastomers - Nanometric polishing

Characteristics table