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The Dominant Type of Atomic Disorder in α‐Al 2 O 3
Author(s) -
MOHAPATRA S. K.,
KRÖGER F. A.
Publication year - 1978
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.1151-2916.1978.tb09249.x
Subject(s) - enthalpy , type (biology) , doping , thermodynamics , materials science , schottky diode , condensed matter physics , physics , ecology , diode , biology , optoelectronics
Comparison of the energy of formation per defect, as deduced from experimental results on α‐Al 2 O 3 doped with donors and acceptors on the basis of various models, with theoretical values calculated by Dienes et al . for various disorder models shows closest correspondence of the exFrimentd values with the smallest theoretical values (obtained for Schottky disorder). This indicates that the theoretical results are reliable and that Schottky disorder is the major type of atomic disorder in α‐Al 2 O 3 . Creep data on Al 2 O 3 :Fe by Hollenberg and Gordon make it possible to determine the enthalpy of Frenkel disorder of Al.