Thermal Segregation of Cations in Iron Aluminate Spinels

W. T. PETUSKEY; H. K. BOWEN

doi:10.1111/j.1151-2916.1981.tb10227.x

Thermal Segregation of Cations in Iron Aluminate Spinels

W. T. PETUSKEY, H. K. BOWEN

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27 Scopus citations

Abstract

Thermal segregation experiments were performed on open and encapsulated wafers of Fe(Fe_1.51Al_0.49)O₄ spinels using CO₂ laser radiation as a heat source. The correlation of “apparent” marker movement and cation segregation led to the conclusion that the free exchange of gaseous oxygen at the external spinel surfaces is necessary to cause significant redistribution of aluminum and iron in a temperature gradient. This was explained by the different mobilities of different cations in a net vacancy (low. Effectively no segregation was observed for the zero vacancy flux condition.

Original language	English (US)
Pages (from-to)	611-617
Number of pages	7
Journal	Journal of the American Ceramic Society
Volume	64
Issue number	10
DOIs	https://doi.org/10.1111/j.1151-2916.1981.tb10227.x
State	Published - Oct 1981
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

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10.1111/j.1151-2916.1981.tb10227.x

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abstract = "Thermal segregation experiments were performed on open and encapsulated wafers of Fe(Fe1.51Al0.49)O4 spinels using CO2 laser radiation as a heat source. The correlation of “apparent” marker movement and cation segregation led to the conclusion that the free exchange of gaseous oxygen at the external spinel surfaces is necessary to cause significant redistribution of aluminum and iron in a temperature gradient. This was explained by the different mobilities of different cations in a net vacancy (low. Effectively no segregation was observed for the zero vacancy flux condition.",

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AB - Thermal segregation experiments were performed on open and encapsulated wafers of Fe(Fe1.51Al0.49)O4 spinels using CO2 laser radiation as a heat source. The correlation of “apparent” marker movement and cation segregation led to the conclusion that the free exchange of gaseous oxygen at the external spinel surfaces is necessary to cause significant redistribution of aluminum and iron in a temperature gradient. This was explained by the different mobilities of different cations in a net vacancy (low. Effectively no segregation was observed for the zero vacancy flux condition.

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Thermal Segregation of Cations in Iron Aluminate Spinels

Abstract

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