Alpha-Aluminium Oxide - an overview | ScienceDirect Topics
WEBAluminum oxide, α-Al 2 O 3, crystallizes in the corundum structure in which the oxygen positions approximate to hexagonal close packing, with trivalent aluminum cations occupying two thirds of the octahedral sites.
mp-1143: Al2O3 (trigonal, R-3c, 167) - Materials Project
WEBAl2O3 is Corundum structured and crystallizes in the trigonal R-3c space group. The structure is three-dimensional. Al3+ is bonded to six equivalent O2- atoms to form a mixture of corner, edge, and face-sharing AlO6 octahedra.
WEBEach structure of Al2O3 has its own distinct spectroscopic results. As crystalline structure begins to form, FTIR can identify different atomic bonds by different wavenumbers. The spectra of α- Al2O3 can be identified by distinct peaks at 440, 567 and 650 cm-1.
Preparation and investigation of the structural properties of α-Al2O3 ...
WEBOct 1, 2020 · In this study, α-Al 2 O 3 nanoparticles were prepared using a simple sol-gel method. Prepared α-Al 2 O 3 nanoparticles characterized by XRD, FESEM, TEM, and EDS analysis.
Structure and Reactivity of α-Al2O3(0001) Surfaces: How Do Al–I …
WEBJul 28, 2022 · In this study, we employed vibrational sum frequency spectroscopy (VSFS) and density functional theory (DFT) simulation to study the surface phonon modes of the differently terminated α-Al 2 O 3 (0001) surfaces in both UHV and ambient.
Towards Macroporous α-Al2O3—Routes, Possibilities and …
WEBApr 10, 2020 · Publications claiming the fabrication of α-Al2O3 with high specific surface areas (HSSA) are comprehensively assessed and critically reviewed. An account of all major routes towards HSSA α-Al2O3 is given, including hydrothermal methods, pore protection approaches, dopants, anodically oxidized alumina membranes, and sol-gel …
Sol-gel synthesis of α-Al2O3 with enhanced porosity via …
WEBDec 27, 2019 · We report the successful establishment of plain short-chain dicarboxylic acids (DCA) as porogenes in the sol-gel synthesis of macroporous α-Al2O3.
Synthesis of α-Al2O3 nanoparticles with uniform size distribution …
WEBMar 15, 2024 · It facilitates the formation of α-Al 2 O 3 nanoparticles with uniform grain distribution. In this paper, α-Al 2 O 3 nanoparticles were prepared by low-temperature calcination of AACH mechanically ball-milled with stearic acid as a dispersant.
Imaging the atomic arrangements on the high-temperature reconstructed α ...
WEBNov 1, 2001 · Here we use a dynamic scanning force microscopy technique3 to image directly the atomic structure of the high-temperature phase of the α-Al2O3(0001) surface.
Aluminum Oxide and Alumina Ceramics (review). Part 1 ... - Springer
WEBAug 15, 2019 · Aluminum oxide is used in some composite materials as a filler (Al 2 O 3 fibers) or matrix (for example, reinforced with SiC fibers). In addition, Al 2 O 3 demonstrates biocompatibility and is used in medicine for implants, including synthetic eye lens.
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