Spherical Alumina Powders

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Description

GNPGraystar’s Spherical Alumina is a spherical alumina powder with high thermal conductivity, good heat resistance, high electrical insulation, high hardness, and low abrasity. The spherical nature of this powder allows for high flowability and high packing density. It has Spherical Particles Ratio: ≥ 93 %

This material data has been provided by GNPGraystar Specialty Materials.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

Properties

General

PropertyValueComment

Loss on Ignition

0.1 %

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max.

Particle size D50

1.0 - 125.0 μm

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different specifications, please refer to the table below

Particle size range

2.0 - 120.0 µm

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different specifications, please refer to the table below

Relative density

3.8 [-]

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Specific surface area

0.02 - 1.2 m²/g

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BET, different specifications, please refer to the table below

Electrical

PropertyValue

Chemical properties

PropertyValueComment

Aluminium

99.8 %

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min. Al₂O₃

Iron

0.02

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Fe₂O₃

Silicon

0.05

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SiO₂

Sodium

0.02

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max. Na₂O

0.005

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Na⁺

Technological properties

Property
Application areas

GNPGraystar’s Spherical Alumina is used in resins, rubbers, and plastics as fillers for thermal conductive sheets, fillers for molding materials, base powder for baking ceramics, blasting materials, and spacers.

Color

White, Whitness: 90

Other

Typical Sizing Specifications:


Productd50 (µm)SSA (m²/g)
2 µm2 ± 10.50 - 1.20
5 µm5 ± 10.20 - 0.40
10 µm10 ± 20.10 - 0.20
15 µm15 ± 20.10 - 0.20
20 µm20 ± 40.07 - 0.15
40 µm42 ± 50.07 - 0.15
50 µm50 ± 50.07 - 0.15
70 µm73 ± 50.06 - 0.13
90 µm90 ± 50.05 - 0.10
120 µm120 ± 50.02 - 0.10


Other/Special Sizing is available upon request.

Actual PSD & SSA also available upon request.