Calcined Alumina (Fine/Super Ground) M-S1SG

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Description

GNPGraystar’s Precision Calcined Alumina is aluminum oxide that has been heated at temperatures in excess of 1,050°C (1,922°F) to drive off nearly all chemically combined water. In this form, alumina has great chemical purity, extreme hardness (9 on the Mohs hardness scale, on which diamond is 10), high density, and a high melting point (slightly above 2,000°C [3,632°F]).

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

Bulk density

0.8 g/cm³

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Loss on Ignition

0.3 %

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max.

Particle size range

2.5 - 4.0 µm

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Specific surface area

0.6000000000000001 - 1.5 m²/g

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BET

Thermal

PropertyValue

Melting point

2000.0 °C

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Chemical properties

PropertyValueComment

Aluminium

99.5 %

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min. Al₂O₃

Iron

0.05

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max. Fe₂O₃

Silicon

0.05

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max. SiO₂

Sodium

0.3

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max. Na₂O

Technological properties

Property
Application areas

GNPGraystar’s Calcined Alumina is used in refractory applications as well as ceramic applications including spark plugs, tap washers, pump seal, electronic substrates, grinding media, abrasion resistant tiles, cutting tools, bioceramics, body armor, laboratory ware, and wear parts for the textile and paper industries.


It is also used as a friction material in brake linings, in potting compounds to disperse heat, and in polishing, lapping, and buffing compounds.

Crystal structure

Alfa Alumina: 98%