634875 Sigma-Aldrich

Aluminum oxide

single crystal substrate, <0001>

Synonym: Alumina, Sapphire



Related Categories Aluminum, Electronic Materials, Materials Science, Metal and Ceramic Science, Micro/NanoElectronics,
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
form   single crystal substrate
hardness   9 mohs
L × W × thickness   10 mm × 10 mm × 0.5 mm
mp   2040 °C (lit.)
semiconductor properties   <0001>
storage temp.   room temp
SMILES string   O=[Al]O[Al]=O
InChI   1S/2Al.3O



1, 5 ea in rigid mailer

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)

Safety & Documentation

Safety Information

Personal Protective Equipment 
NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Protocols & Articles


Atomic Layer Deposition of Nanomaterials for Li-Ion Batteries, Fuel Cells, and Solar Cells

Erwin Kessels,* Harm Knoops, Matthieu Weber, Adrie Mackus, and Mariadriana Creatore Department of Applied Physics, Eindhoven University of Technology P.O. Box 513, 5600 MB Eindhoven, The Netherlands ...
Keywords: Adhesion, Atomic layer deposition, Building blocks, Catalysis, Chemical vapor deposition, Crystallization, Deposition, Diffusion, Microscopy, Nanomaterials, Nanotubes, Nucleic acid annealing, Oxidations, Recombination, Reductions, Renewable energy, Scanning electron microscopy, Solar cells

Building and Engineering Micro/Nano Architectures of Single-Walled Carbon Nanotubes for Electronic Applications

1Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115, USA 2Department of Physics, Northeastern University, Boston, MA 02115, USA 3Department of Mechanical E...
Ji Hao,1 Hyunyoung Jung,1 Younglae Kim,1 Bo Li,1,3 Swastik Kar,2 Yung Joon Jung1*
Material Matters, 2017, 12.1
Keywords: Chromatin immunoprecipitation, Environmental, Nanotubes, Redox Reactions, Reductions, transformation

Deposition Substrates and Silicon Wafers

Successful deposition of materials often depends on the proper substrates, with a good lattice match and a clean, even surface. We are proud to offer a variety of new single crystal substrates and si...
Chemfiles Volume 4 Article 3
Keywords: Deposition, Diffraction, Semiconductor, Trace metal analysis, X-Ray diffraction

Dye-Sensitized and Perovskite Solar Cells: Interface Engineering by Atomic Layer Deposition

Valerio Zardetto,1 Francesco Di Giacomo,2 Thomas M. Brown,2 Aldo Di Carlo,2 Alessandra D’Epifanio,3 Silvia Licoccia,3 Erwin Kessels,1 Mariadriana Creatore1* 1Department of Applied Physics, Eindhoven ...
Keywords: Atomic layer deposition, Calorimetry, Capillary electrophoresis, Catalysis, Chemical vapor deposition, Deposition, Electronics, Materials Science, Microscopy, Photovoltaics, Positron Emission Tomography, Recombination, Reductions, Scanning electron microscopy, Semiconductor, Separation, Sol-gel, Solar cells

FePt Nanogranular Films for High Density Heat-assisted Magnetic Recording

Kazuhiro Hono, National Institute for Materials Research, Tsukuba 305-0047, Japan Email:
Keywords: Deposition, Nucleic acid annealing

Recent Progress in Spintronic Materials

Soubantika Palchoudhury,1 Karthik Ramasamy,2* Arunava Gupta3* 1Civil and Chemical Engineering, University of Tennessee at Chattanooga, Chattanooga, Tennessee 37403, USA 2Center for Integrated Nanotec...
Soubantika Palchoudhury, Karthik Ramasamy, Arunava Gupta
By: Dr. Hui Zhu, Material Matters, 2016, 11.4
Keywords: Catalysis, Microscopy, Scanning electron microscopy, Semiconductor, Transmission electron microscopy

Synthesis of Melting Gels Using Mono-Substituted and Di-Substituted Alkoxysiloxanes

Hybrid organic-inorganic sol-gel materials containing silica were first called “ORMOSILs” in 1984.1 Since then, the number of hybrid organicinorganic combinations has increased rapidly.2 Hybrid mater...
Lisa C. Klein and Andrei Jitianu
Material Matters, Volume 7, Number 2, 8–14
Keywords: Absorption, Adhesion, Calorimetry, Combustion, Condensations, Deposition, Exothermic, Filtration, Materials Science, Melting, Oxidations, Polymerization reactions, Purification, Semiconductor, Sol-gel, Solar cells, Solvents, Spin coating, Substitutions, Thermal analysis

Peer-Reviewed Papers


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