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718475

Sigma-Aldrich

Óxido de alúmina

nanopowder, 13 nm primary particle size (TEM), 99.8% trace metals basis

Sinónimos:

Alúmina

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About This Item

Fórmula lineal:
Al2O3
Número de CAS:
1344-28-1
Peso molecular:
101.96
Número CE:
215-691-6
Número MDL:
MFCD00003424
Código UNSPSC:
12352303
eCl@ss:
38120402
ID de la sustancia en PubChem:
329763581
NACRES:
NA.23
En este momento no podemos mostrarle ni los precios ni la disponibilidad

Ensayo

99.8% trace metals basis

Formulario

nanopowder

superficie

85-115 m2/g , BET

tamaño de partícula primaria

13 nm (TEM)

mp

2040 °C (lit.)

cadena SMILES

O=[Al]O[Al]=O

InChI

1S/2Al.3O

Clave InChI

TWNQGVIAIRXVLR-UHFFFAOYSA-N

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Descripción general

Aluminum oxide nanoparticles (AlNPs) are porous nanomaterials with corundum-like structures. They possess high surface area, mechanical strength, and good optical properties. In addition, they have excellent chemical stability in harsh conditions such as abrasive environments and high temperatures. The ease of surface modification and bioinertess make them suitable for biomedical applications. These nanomaterials can be prepared by a cost-effective and simple protocol.

Aplicación

Aluminum nanoparticles can be used to prepare:
  • Water-based nanofluids, which are used in engine cooling, heat exchangers, and nuclear cooling system. In graphene oxide/alumina nanofluid, the addition of aluminum nanoparticles improves the physical structure of graphene oxide and reduces the viscosity of the composite.
  • Polysiloxane-aluminum oxide composites, applicable as an elastomeric thermal pad for light-emitting diodes.
It can also be used as an additive to improve the mechanical properties of polyvinyl chloride. The Al2O3 nanoparticles act as a solid inert phase in the polymer matrix and restrict the mobility of chains. As a result glass transition temperature increases and elastic modulus decreases.

Características y beneficios

  • Stable in a harsh non-biological environment.
  • They can be easily prepared through established synthesis methods.
  • A vast surface area allows conjugation with chemical and biological molecules.
  • Their surface modification protocols are straightforward.
  • They can easily interact with biological interfaces.

Código de clase de almacenamiento

13 - Non Combustible Solids

Clase de riesgo para el agua (WGK)

nwg

Punto de inflamabilidad (°F)

Not applicable

Punto de inflamabilidad (°C)

Not applicable

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Certificados de análisis (COA)

Lot/Batch Number
MKCV8124
MKCR0745
MKCN1394
MKCH4442
MKCC7668

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Shuo Yang et al.
Sensors (Basel, Switzerland), 19(14) (2019-07-25)
Readily available temperature sensing in boilers is necessary to improve efficiencies, minimize downtime, and reduce toxic emissions for a power plant. The current techniques are typically deployed as a single-point measurement and are primarily used for detection and prevention of
Laura M Corredor et al.
Nanomaterials (Basel, Switzerland), 9(1) (2019-01-16)
Recent studies revealed higher polymer flooding performance upon adding metal oxide nanoparticles (NPs) to acrylamide-based polymers during heavy oil recovery. The current study considers the effect of TiO₂, Al₂O₃, in-situ prepared Fe(OH)₃ and surface-modified SiO₂ NPs on the performance of
Colin J Ingham et al.
Biotechnology advances, 30(5), 1089-1099 (2011-08-23)
Porous aluminum oxide (PAO) is a ceramic formed by an anodization process of pure aluminum that enables the controllable assembly of exceptionally dense and regular nanopores in a planar membrane. As a consequence, PAO has a high porosity, nanopores with
Chien-Chih Lin et al.
Nanoscale, 5(17), 8090-8097 (2013-07-25)
We demonstrated a promising route for enhancing temperature sensitivity, improving saturation voltage, and reducing power consumption of the MOS(p) tunneling temperature sensors by introducing ultrathin Al2O3 into the dielectric stacks. Detailed illustrations of the working mechanism and device concept are
Joohoon Kang et al.
ACS nano, 9(4), 3596-3604 (2015-03-19)
Solution dispersions of two-dimensional (2D) black phosphorus (BP)--often referred to as phosphorene--are achieved by solvent exfoliation. These pristine, electronic-grade BP dispersions are produced with anhydrous organic solvents in a sealed-tip ultrasonication system, which circumvents BP degradation that would otherwise occur
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    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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