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Effect of Magnesium Oxide on Faceted Vicinal (0001) Surface of Aluminum Oxide
Author(s) -
Park Chan Woo,
Yoon Duk Yong
Publication year - 2001
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2001.tb00678.x
Subject(s) - vicinal , magnesium , oxide , aluminum oxide , materials science , aluminium , surface (topology) , atmosphere (unit) , crystal (programming language) , atomic force microscopy , inorganic chemistry , chemical engineering , crystallography , metallurgy , chemistry , nanotechnology , thermodynamics , geometry , mathematics , physics , organic chemistry , computer science , programming language , engineering
Atomic force microscopy has been used to observe the vicinal (0001) surface of Al 2 O 3 . The surface develops a hill‐and‐valley structure when heat‐treated in air and becomes defaceted and therefore atomically rough when heat‐treated in an MgO atmosphere at 1600°C. The results are consistent with the previously observed polyhedral equilibrium shape of Al 2 O 3 crystal and the surface roughening effect of MgO.