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634875

Sigma-Aldrich

Aluminum oxide

single crystal substrate, <0001>

Synonym(s):

Sapphire, 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:
12352303
eCl@ss:
38120402
PubChem Substance ID:
24882698
NACRES:
NA.23

description

Crystallographic D spacing ((0001) - c plane: 2.165 Angstrom)
Crystallographic D spacing ((1011) - s plane: 1.961 Angstrom)
Crystallographic D spacing ((1040) - m plane: 1.375 Angstrom)
Crystallographic D spacing ((1102) - r plane: 1.740 Angstrom)
Crystallographic D spacing ((1120) - a plane: 2.379 Angstrom)
Crystallographic D spacing ((1123) - n plane: 1.147 Angstrom)
single side polished

Quality Level

100

form

single crystal substrate

hardness

9 mohs

L × W × thickness

10 mm × 10 mm × 0.5 mm

mp

2040 °C (lit.)

semiconductor properties

<0001>

SMILES string

O=[Al]O[Al]=O

InChI

1S/2Al.3O

InChI key

TWNQGVIAIRXVLR-UHFFFAOYSA-N

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Features and Benefits

Common substrate for III-V nitrides as well as many other epitaxial films.

Physical properties

thermal expansion = 7.5 × 10-6 /°C; specific heat = 0.10 cal/°C; thermal conductivity = 46.06 @ 0 °C, 25.12 @ 100 °C, 12.56 @ 400 °C (W/m,K); dielectric constant = ~9.4 @ 300 K at A axis, ~11.58 @ C axis; loss tangent at 10 GHz < 2 × 10-5 at A axis, 5 × 10-6 at C axis

Physical form

Crystalline, hexagonal (a = 4.758 Å, c = 12.992)

Storage Class Code

13 - Non Combustible Solids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
MKCT7636
MKCS8038
MKCS3960
MKCR7006
MKCQ9033

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G Siddiqi et al.
Dalton transactions (Cambridge, England : 2003), 44(32), 14349-14353 (2015-07-23)
A simple one-step and gram-scale synthesis of [Au5Mes5] from AuCl3 was developed, and this molecular precursor was used to generate Au nanoparticles on SiO2 and Al2O3. While [Au5Mes5] does not react with surface silanols and is only physisorbed, its incipient
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
Jaakko Akola et al.
Proceedings of the National Academy of Sciences of the United States of America, 110(25), 10129-10134 (2013-06-01)
Glass formation in the CaO-Al2O3 system represents an important phenomenon because it does not contain typical network-forming cations. We have produced structural models of CaO-Al2O3 glasses using combined density functional theory-reverse Monte Carlo simulations and obtained structures that reproduce experiments
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
Do Won Hwang et al.
EJNMMI research, 4(1), 61-61 (2015-06-28)
Three-dimensional (3D) hydrogel-based stem cell therapies contribute to enhanced therapeutic efficacy in treating diseases, and determining the optimal mechanical strength of the hydrogel in vivo is important for therapeutic success. We evaluated the proliferation of human neural stem cells incorporated
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