Diffusion of Ni and Ba in MgO up to 2600 °C | Zendy

Harding R. C. | Zendy

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Diffusion of Ni and Ba in MgO up to 2600 °C

Author(s) -

Harding R. C.

Publication year - 1972

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.2220500116

Subject(s) - diffusion , materials science , ion , enthalpy , impurity , magnesium , activation energy , atmospheric temperature range , schottky diode , analytical chemistry (journal) , crystal (programming language) , crystallography , thermodynamics , chemistry , metallurgy , physics , organic chemistry , chromatography , optoelectronics , diode , computer science , programming language

The diffusion of Ni 2+ and Ba 2+ in single crystal magnesium oxide has been studied over the temperature range 1100 to 2500 °C using radio isotopes and a sectioning technique. Results indicate that the enthalpies of motion of these two ions in MgO differ by about 10% only. Below about 1500 °C, segregation of impurities to dislocations has a marked effect on the activation energy for diffusion in agreement with the results obtained in cation self‐diffusion studies previously published. The formation enthalpy of a Schottky pair has also been confirmed.

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