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414069

Sigma-Aldrich

Aluminum oxide

pellets, 3 mm

Synonym(s):

Alumina

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About This Item

Linear Formula:
Al2O3
CAS Number:
1344-28-1
Molecular Weight:
101.96
EC Number:
215-691-6
MDL number:
MFCD00003424
UNSPSC Code:
12000000
PubChem Substance ID:
329756100
NACRES:
SB.52
Pricing and availability is not currently available.

form

pellets

Quality Level

100

particle size

3 mm

mp

2040 °C (lit.)

SMILES string

O=[Al]O[Al]=O

InChI

1S/2Al.3O

InChI key

TWNQGVIAIRXVLR-UHFFFAOYSA-N

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General description

Aluminum oxide (alumina) is a common raw material for ceramic materials. It is a good electrical insulator that shows stability at high temperature and resistance to chemicals.[1] Alumina is an important source for aluminum and has been prepared from high-alumina ladle furnace refining slag.[2] It is reported to enhance the reaction rate of aldose to ketose conversion by Lobry de Bruyn–Alberda van Ekenstein transformation.[3] It is a key constituent of NOx storage catalysts (NSC) which is employed to get rid of nitrogen oxides from the exhaust gas of lean burn engines.[4] A study of the surface passivation characteristics of aluminium oxide on crystalline silicon shows many advantages which can be applied in silicon solar cell production.[5]

Application

Aluminum oxide may be used as a dopant to produce optical fiber amplifiers and high-power fiber lasers.[6]

Storage Class Code

13 - Non Combustible Solids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
MKCV9094
WXBD9325V
MKCR4002
MKCN9990
MKCK0809

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Aldose-ketose interconversion in pyridine in the presence of aluminium oxide.
Ekeberg D, et al.
Carbohydrate Research, 342(14), 1992-1997 (2007)
Study on the mechanism of the reaction of NO2 with aluminium oxide.
Apostolescu N, et al.
Applied Catalysis. B, Environmental, 51(1), 43-50 (2004)
High contrast laser marking of alumina.
Penide J, et al.
Applied Surface Science, 336, 118-128 (2015)
Alumina as a dopant in optical fiber by OVD.
Wang J.
Applied Physics. A, Materials Science & Processing, 116(2), 505-518 (2014)
Advances in the surface passivation of silicon solar cells.
Schmidt J, et al.
Energy Procedia, 15, 30-39 (2012)
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Questions

1–3 of 3 Questions  

  1. What phase is it? Is it suitable for catalysts?

    1 answer

    1. This product is not tested by XRD to confirm the phase. However, historical information does indicate this product could be an alpha phase. The phase should be verified by the end user. This material has been reported by researchers for preparation in catalysts. Please see the article citation below for more information.

      Duc Ba Nguyen, Van Toan Nguyen, Il Jeong Heo, Young Sun Mok, Removal of NOx by selective catalytic reduction coupled with plasma under temperature fluctuation condition, Journal of Industrial and Engineering Chemistry, Volume 72, 2019, Pages 400-407, ISSN 1226-086X, https://doi.org/10.1016/j.jiec.2018.12.042.

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  2. What is the surface area for the 3mm particle?

    1 answer

    1. The surface area at the particle level has not been evaluated. The overall surface area of this product is not measured on a lot-to-lot basis. However, historical data suggests an approximate surface area of 31.1 m2/g.

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  3. Hi for this product, is it spherical in shape?

    1 answer

    1. Product 414069 is in spherical form with a particle size of 3 mm.

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