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Published in:
Introduction to Mixed Ionic–Electronic Conducting Membranes Read chapter Read first chapter

2017 | OriginalPaper | Chapter

2. Defects and Diffusion

Authors : Xuefeng Zhu, Weishen Yang

Published in: Mixed Conducting Ceramic Membranes

Publisher: Springer Berlin Heidelberg

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Abstract

Point defects are the main defect type concerned in the field of MIEC membranes, because they are closely related to the motion of oxygen vacancies and holes in crystalline solids. In the first part of this chapter, the concept of point defects is introduced briefly, and then, the knowledge about point defects in MIEC oxides, defect association, and defect equilibrium are introduced. Grain boundary is mentioned as an important two-dimensional defect because of its potential influences on the mechanical, electric, magnetic, catalytic, and thermal properties of materials. In the second part, the concept of diffusion, the diffusion mechanism, and diffusion paths of oxygen ions in perovskite- and fluorite-type ionic conductors are presented. There are several types of diffusion coefficients derived from different measuring methods, and the difference and relationships between these diffusion coefficients are provided.

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next chapter Ionic Conductors and Aspects Related to High Temperature
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Metadata
Title
Defects and Diffusion
Authors
Xuefeng Zhu
Weishen Yang
Copyright Year
2017
Publisher
Springer Berlin Heidelberg
Book
Mixed Conducting Ceramic Membranes

Print ISBN: 978-3-662-53532-5

Electronic ISBN: 978-3-662-53534-9

Copyright Year: 2017

DOI
https://doi.org/10.1007/978-3-662-53534-9_2