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1.01095

Óxido de alúmina

(anhydrous (γ-aluminia)), Technipur®

Sinónimos:

Alúmina

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Acerca de este artículo

Fórmula lineal:
Al2O3
Número CAS:
1344-28-1
Peso molecular:
101.96
UNSPSC Code:
12352311
NACRES:
NA.21
MDL number:
MFCD00003424
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Quality Segment

200

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

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

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Este artículo
265497934062229423
Óxido de alúmina (anhydrous (γ-aluminia)), Technipur®

Sigma-Aldrich

101095

Óxido de alúmina

Óxido de alúmina powder, primarily α phase, ≤10 μm avg. part. size, 99.5% trace metals basis

Sigma-Aldrich

265497

Óxido de alúmina

Óxido de alúmina alpha phase, nanopowder, 135 nm avg. part. size, 99.9% trace metals basis

Sigma-Aldrich

934062

Óxido de alúmina

Óxido de alúmina powder, 99.99% trace metals basis

Sigma-Aldrich

229423

Óxido de alúmina

description

(anhydrous (γ-aluminia)), Technipur®

description

powder, primarily α phase, ≤10 μm avg. part. size, 99.5% trace metals basis

description

alpha phase, nanopowder, 135 nm avg. part. size, 99.9% trace metals basis

description

powder, 99.99% trace metals basis

mp

2040 °C (lit.)

mp

2040 °C (lit.)

mp

2040 °C (lit.)

mp

2040 °C (lit.)

Quality Level

200

Quality Level

100

Quality Level

100

Quality Level

100

pH

5 (100 °C, 50 g/L in H2O, suspension)

pH

-

pH

-

pH

-

bp

>2980 °C/1013 hPa

bp

-

bp

-

bp

-

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flash_point_f

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flash_point_c

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Clase de almacenamiento

11 - Combustible Solids

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Certificados de análisis (COA)

Lot/Batch Number

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Questions

  1. What is the particle size distribution? is this a gamma alumina? Do you sell a gamma-alumina with a d50 in the range 20 to 50 µm?

    1 answer

    1. The particle size distribution for this item is listed on the lot specific Certificate of Analysis as follows:
      Particles > 0.2 mm: ≤ 28?%
      Particles > 0.063 mm: ≥ 72?%
      Particles < 0.063 mm: ≤ 28?%

      Currently, there is not another γ-alumina product offered with a d50 range of 20 to 50 µm.

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