Nonstoichiometric Oxides

Nonstoichiometric Oxides

1st Edition - December 28, 1981

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  • Editor: O.T. Soerensen
  • eBook ISBN: 9780323149808

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Nonstoichiometric Oxides discusses the thermodynamic and structural studies of nonstoichiometric oxides. This eight-chapter text also covers the defect-defect interactions in these compounds. The introductory chapters describe the thermodynamic properties of nonstoichiometric oxides in terms of defect complexes using the classical thermodynamic principles and from a statistical thermodynamics point of view. These chapters also include statistical thermodynamic models that indicate the ordered nonstoichiometric phase range in these oxides. The subsequent chapters examine the transport properties, such as diffusion and electrical conductivity. Diffusion theories and experimental diffusion coefficients for several systems, as well as the electrical properties of the highly defective ionic and mixed oxide conductor, are specifically tackled in these chapters. The concluding chapters present the pertinent results obtained in nonstoichiometric oxide structural studies using high-resolution electron microscopy and X-ray and neutron diffraction. Inorganic chemists and inorganic chemistry teachers and students will greatly appreciate this book.

Table of Contents

  • List of Contributors


    1 Thermodynamics and Defect Structure of Nonstoichiometric Oxides

    I. Introduction

    II. General Thermodynamic Considerations of the Phase Relationships in Nonstoichiometric Oxides

    III. Classification of Nonstoichiometric Oxides

    IV. Thermodynamics and Defect Structure of Oxygen-Deficient Oxides

    V. Thermodynamics and Defect Structure of Metal-Deficient Oxides

    VI. Thermodynamics and Defect Structure of Metallic Transition Metal Monoxides

    VII. Thermodynamics and Defect Structure of Excess-Oxygen Oxides

    VIII. Thermodynamics and Defect Structure of Oxides Existing as both Oxygen-Excess and Oxygen-Deficient Compounds

    IX. Recommendations for Future Work on Nonstoichiometric Oxides


    2 Defect Clustering in Nonstoichiometric Oxides

    I. Introduction

    II. Nonstoichiometry and Disorder

    III. Determination and Characterization of the Defect Structure of Grossly Defective Phases

    IV. Point Defect Aggregates

    V. Extended Defect Structures

    VI. Summary and Conclusions


    3 A New Method of Statistical Thermodynamics and Its Application to Oxides of the Lanthanide and Actinide Series

    I. Statistical Thermodynamic Concepts for Grossly Nonstoichiometric Compounds

    II. Basic Concepts and Formalism of Spacing Statistics

    III. Applications of Spacing Statistics

    IV. Conclusions and Recommendations for Future Work


    4 Diffusion in Nonstoichiometric Oxides

    I. Introduction

    II. Crystal Structures Considered

    III. Point Defects and Clustering

    IV. Tracer Diffusion and Related Processes

    V. Diffusion in the Fluorite Structure: UO2, (U, Pu) O2, CeO2, ZrO2, ThO2

    VI. Diffusion in the Rutile Structure: TiO2

    VII. Diffusion in the Rock-Salt Structure: FeO, CoO, NiO

    VIII. Results for More Complex Nonstoichiometric Oxides

    IX. Concluding Remarks


    5 Mass Transport in Anion-Deficient Fluorite Oxides

    I. Introduction

    II. Cation Mobility in Anion-Deficient Fluorite Oxides

    III. Anion Mobility in Anion-Deficient Oxides

    IV. The Effects of Microstructure

    V. Defect Chemistry and Conductivity

    VI. Fluorite Oxides

    VII. Other Oxygen Ion Conductors

    VIII. General Conclusions


    6 Mixed Conduction in Nonstoichiometric Oxides

    I. Introduction

    II. Electrical Conduction in Oxides

    III. Defect Equilibria

    IV. Thermodynamic and Kinetic Processes

    V. Mixed Conduction in Oxides—A Survey


    7 Structure, Defects, and Nonstoichiometry in Oxides: An Electron Microscopic View

    I. Introduction

    II. The Techniques of High-Resolution Electron Microscopy

    III. The Application of Microscopy to the Study of Nonstoichiometry in Oxides

    IV. Application of HRTEM to Chemical Dynamics

    V. Concluding Remarks


    8 Structural Studies on Nonstoichiometric Oxides Using X-Ray and Neutron Diffraction

    I. Introduction

    II. Comparative Roles of Diffraction Methods and Electron Microscopy

    III. X Rays or Neutrons?

    IV. Nonstoichiometric Binary Oxides

    V. Crystallographic Shear Structures

    VI. Block Structures

    VII. Infinitely Adaptive Structures

    VIII. Conclusion



Product details

  • No. of pages: 454
  • Language: English
  • Copyright: © Academic Press 1981
  • Published: December 28, 1981
  • Imprint: Academic Press
  • eBook ISBN: 9780323149808

About the Editor

O.T. Soerensen

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