Calcined Alumina (Fine/Super Ground) M-1FG

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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]).

Diese Materialdaten wurden von GNPGraystar Specialty Materials zur Verfügung gestellt

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Ashby charts

Eigenschaften

Allgemein

PropertyValueComment

Loss on Ignition

0.3 %

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max.

Partikelgrößenbereich

4.0 - 7.0 µm

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average

Schüttdichte

0.8 g/cm³

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Sieve residue 45μm

3 %

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max.

Spezifische Oberfläche

0.6000000000000001 - 1.5 m²/g

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BET

Thermisch

PropertyValue

Schmelzpunkt

2000.0 °C

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Chemical properties

PropertyValueComment

Aluminium

99.3 %

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min. Al₂O₃

Eisen

0.05

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max. Fe₂O₃

Natrium

0.4

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max. Na₂O

Silizium

0.05

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max. SiO₂

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%