A point defect model was used to describe the oxygen nonstoichiometry of the perovskites Lao.75Sr... more A point defect model was used to describe the oxygen nonstoichiometry of the perovskites Lao.75Sro.25CrO3, Lao.9Sro.~FeO3, Lao.9Sro.~CoO3 and Lao.sSro.2MnOa as a function of the oxygen partial pressure. Form the oxygen vacancy concentration predicted by the point defect model, the ionic conductivity was calculated assuming a vacancy diffusion mechanism. The ionic conductivity was combined with the Wagner model for the oxidation of metals to yield an analytical expression for the oxygen permeation current density as a function of the oxygen partial pressure gradient. A linear boundary condition was used to show the effect of a limiting oxygen exchange rate at the surface.
The existence of an existing conventional bank interest in the system prioritizes operasiolnalnya... more The existence of an existing conventional bank interest in the system prioritizes operasiolnalnya, while the Islamic Bank are not familiar with the term of interest but which is the term used for the results. Banking with sharing system designed terbinanya for unity in the risks and share the results of operations between the owner of the funds that keep their money in the bank, with the bank as
A point defect model was used to describe the oxygen nonstoichiometry of the perovskites Lao.75Sr... more A point defect model was used to describe the oxygen nonstoichiometry of the perovskites Lao.75Sro.25CrO3, Lao.9Sro.~FeO3, Lao.9Sro.~CoO3 and Lao.sSro.2MnOa as a function of the oxygen partial pressure. Form the oxygen vacancy concentration predicted by the point defect model, the ionic conductivity was calculated assuming a vacancy diffusion mechanism. The ionic conductivity was combined with the Wagner model for the oxidation of metals to yield an analytical expression for the oxygen permeation current density as a function of the oxygen partial pressure gradient. A linear boundary condition was used to show the effect of a limiting oxygen exchange rate at the surface.
The existence of an existing conventional bank interest in the system prioritizes operasiolnalnya... more The existence of an existing conventional bank interest in the system prioritizes operasiolnalnya, while the Islamic Bank are not familiar with the term of interest but which is the term used for the results. Banking with sharing system designed terbinanya for unity in the risks and share the results of operations between the owner of the funds that keep their money in the bank, with the bank as
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