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1.01095

Sigma-Aldrich

Aluminum oxide

(anhydrous (γ-aluminia)), Technipur®

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Synonym(s):
Alumina
Linear Formula:
Al2O3
CAS Number:
Molecular Weight:
101.96
MDL number:

Quality Level

pH

5 (100 °C, 50 g/L in H2O, suspension)

bp

>2980 °C/1013 hPa

mp

2040 °C (lit.)

SMILES string

O=[Al]O[Al]=O

InChI

1S/2Al.3O

InChI key

TWNQGVIAIRXVLR-UHFFFAOYSA-N

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1 of 4

This Item
A1522265497229423
vibrant-m

1.01095

Aluminum oxide

vibrant-m

A1522

Aluminum oxide

vibrant-m

265497

Aluminum oxide

vibrant-m

229423

Aluminum oxide

pH

5 (100 °C, 50 g/L in H2O, suspension)

pH

-

pH

-

pH

-

bp

>2980 °C/1013 hPa

bp

-

bp

-

bp

-

Quality Level

200

Quality Level

200

Quality Level

100

Quality Level

100

General description

Aluminum oxide is an amphoteric oxide of aluminum. It is also known as alumina. It is widely used in abrasives, refractories, electronics, heat-resistant fibers, ceramics, and glass industries due to its wide availability, high thermal stability, and melting point as well as excellent strength and hardness. Alumina distinguishes itself from many composite materials due to its outstanding mechanical, chemical, and thermal properties.

Application

Aluminum oxide (Al2O3) is widely used as an electrical insulator because of its high ionic inter-atomic bonds, excellent thermal resistive properties, and chemical stability. In electronic and microelectronic applications, Al2O3 is used as a substrate for integrated circuits, as well as high-temperature and corrosive-resistant coating materials. Being a dielectric material,Al2O3 possesses a high breakdown strength (300–700 MV m-1) and relatively large bandgap (∼ 9Ev). Therefore it is a potential candidate for use in dielectric capacitors. It is also used in spark plug insulators, micro-electric substrates, and insulating heatsinks.

In plastic and rubber industries, modified Al2O3 is used as a reinforcing filler to improve the rheological and mechanical properties of the composites.

Legal Information

Technipur is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class

13 - Non Combustible Solids

wgk_germany

nwg

flash_point_f

Not applicable

flash_point_c

Not applicable


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A novel and simple aluminium/sol?gel-derived amorphous aluminium oxide multilayer film with high energy density
Su Z, et al.
Journal of Material Chemistry C, 6, 5616-5623 (2018)
Human health risk assessment for aluminium, aluminium oxide, and aluminium hydroxide
Krewski D, et al.
Journal of Toxicology and Environmental Health. Part B, Critical Reviews, 10(Suppl 1), 1-269 null
Ruys AJ
Alumina Ceramics: Biomedical and Clinical Applications (2019)
Enhancement of properties of red iron oxide ? aluminium oxide solid solutions anticorrosive pigments
Ahmed NM and Selim MM
Pigment & Resin Technology, 34(5), 256-264 (2005)
Element and Processing
Soo-Jin Park S-J & Seo M-K
Interface Science and Technology , 18, 431-499 (2011)

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