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Processing of High‐Density Submicrometer Al 2 O 3 for New Applications
Author(s) -
Krell Andreas,
Blank Paul,
Ma Hongwei,
Hutzler Thomas,
Nebelung Manfred
Publication year - 2003
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.1151-2916.2003.tb03339.x
Subject(s) - corundum , materials science , grain size , particle size , particle size distribution , range (aeronautics) , nanoparticle , microstructure , particle (ecology) , mineralogy , nanotechnology , metallurgy , chemical engineering , composite material , chemistry , oceanography , geology , engineering
Sintered corundum components with submicrometer grain sizes exhibit properties which enable numerous new applications. Wet powder processing is developed to associate minimum grain sizes at highest densities with the lowest population of macrodefects. A closest ratio of powder particle size and sintered grain size is important for obtaining most fine‐grained microstructures. This target was approached best by using powders with particle sizes in the range of 100–200 nm rather than with smaller nanoparticles.