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Temperature Dependence of the Cation Distribution in Nickel Aluminate Spinel from Thermodynamics and X‐Rays
Author(s) -
Han Yong Sheng,
Li Jian Bao,
Ning Xiao Shan,
Chi Bo
Publication year - 2005
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.1551-2916.2005.00603.x
Subject(s) - nial , spinel , thermodynamics , entropy (arrow of time) , nickel , materials science , diffraction , chemistry , intermetallic , metallurgy , physics , optics , alloy
The single crystal NiAl 2 O 4 was prepared by a solid‐state reaction. The change of its cation distribution with temperature was calculated by a modified thermodynamic equation by including a new parameter δ, which is a characteristic of nonconfiguration entropy. The calculated results showed that the degree of inversion for NiAl 2 O 4 decreases with temperature, although the temperature dependence of cation distribution is very weak. This result was supported by X‐ray diffraction measurement.