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Non-Stoichiometric Oxides of 3d-Metals

2015-03-18 Technology & Engineering
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Release : 2015-03-18
Genre : Technology & Engineering
Kind : eBook
Book Rating : 086/5 ( reviews)

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Book Synopsis Non-Stoichiometric Oxides of 3d-Metals by : Andrzej Stok?osa

Download or read book Non-Stoichiometric Oxides of 3d-Metals written by Andrzej Stok?osa. This book was released on 2015-03-18. Available in PDF, EPUB and Kindle. Book excerpt: In the present work, in Part I, new elements widening the bases of the defects theory are shown; particularly, this work discusses the mechanism of the formation of defects as a result of elementary processes; the work also presents a description of the equilibrium state by one equation, taking into account the concentrations of defects and their changes during the process of reaching the equilibrium. The equation relates the concentrations of defects, dependent on the standard Gibbs energies of their formation, with the equilibrium pressure of oxygen. The obtained relations and the discussion have lead to the development of a method for determination of complete diagrams of concentrations of the point defects, which allows taking into account the minority defects. Part II presents the results of the calculations of the diagrams of point defects’ concentrations for a series of pure and doped oxides of transition metals 3d, with different composition (M/O ratio), crystallographic structure and point defects’ structure. A critical analysis of the results of the studies of the deviation from the stoichiometry and the electrical conductivity, obtained (so far) by most research groups has been also performed. A new interpretation of these results, concerning concentrations and types of ionic defects present has been performed and the mobility of electronic defects and its dependence on the temperature and oxygen pressure have been determined.

Structure Processing Properties Relationships in Stoichiometric and Nonstoichiometric Oxides

2020-11-04 Science
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Release : 2020-11-04
Genre : Science
Kind : eBook
Book Rating : 512/5 ( reviews)

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Book Synopsis Structure Processing Properties Relationships in Stoichiometric and Nonstoichiometric Oxides by : Speranta Tanasescu

Download or read book Structure Processing Properties Relationships in Stoichiometric and Nonstoichiometric Oxides written by Speranta Tanasescu. This book was released on 2020-11-04. Available in PDF, EPUB and Kindle. Book excerpt: The interrelation among composition, microstructure, and properties of stoichiometric and nonstoichiometric compounds is a major field of research for both scientific and technological reasons. As such, this book focuses on metal oxides, which present a large diversity of electrical, magnetic, optical, optoelectronic, thermal, electrochemical, and catalytic properties, making them suitable for a wide range of applications. By bringing together scientific contributions with special emphasis on the interrelations between materials chemistry, processing, microstructures, and properties of stoichiometric and nonstoichiometric metal oxides, this book highlights the importance of tightly integrating high-throughput experiments (including both synthesis and characterization) and efficient and robust theory for the design of advanced materials.

Chemistry of Non-stoichiometric Compounds

1994-01-13 Science
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Release : 1994-01-13
Genre : Science
Kind : eBook
Book Rating : 139/5 ( reviews)

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Book Synopsis Chemistry of Non-stoichiometric Compounds by : Koji Kosuge

Download or read book Chemistry of Non-stoichiometric Compounds written by Koji Kosuge. This book was released on 1994-01-13. Available in PDF, EPUB and Kindle. Book excerpt: This unified presentation of the chemistry of non-stoichiometric compounds is the first monograph on the subject for two decades. Based on statistical thermodynamics and structural inorganic chemistry, with descriptions of modern examples and applications, this will be useful to both researchers in industry and undergraduates in solid state chemistry and physics.

Structure and Concentration of Point Defects in Selected Spinels and Simple Oxides

2021-04-09 Technology & Engineering
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Release : 2021-04-09
Genre : Technology & Engineering
Kind : eBook
Book Rating : 900/5 ( reviews)

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Book Synopsis Structure and Concentration of Point Defects in Selected Spinels and Simple Oxides by : Andrzej Stokłosa

Download or read book Structure and Concentration of Point Defects in Selected Spinels and Simple Oxides written by Andrzej Stokłosa. This book was released on 2021-04-09. Available in PDF, EPUB and Kindle. Book excerpt: Structure and Concentration of Point Defects in Selected Spinels and Simple Oxides presents diagrams and numerical data of important properties of spinels and oxides based on experimental results published in the literature. The values of many parameters presented can be used for optimization of preparation of new systems, to predict the practical properties of these systems. Applications include electronic devices, new metallic alloys with improved corrosion resistance, new ceramic materials, and novel catalysts, particularly for oxygen evolution and reduction reactions. Organized into four comprehensive parts, the authors present the problem of the structure and concentration of ionic and electronic defects in magnetite and hausmannite, pure and doped with M3+ cations, and in spinels exhibiting magnetic properties and high electric conductance. Additional Features include: Includes 236 figures presenting equilibrium diagrams of point defects and other useful details related to stoichiometric and nonstoichiometric spinels and oxides. Details novel methods of calculation of equilibria involving point defects. Collects scattered data published in nearly 500 original articles since the 1950s on spinels and oxides in one useful volume. Building upon the data presented, this book is an indispensable reference for material scientists and engineers developing new metal or oxide-based systems can easily calculate other useful parameters and compare the properties of different materials to select the best candidates for an intended use.

Nonstoichiometric Oxides

2012-12-02 Science
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Release : 2012-12-02
Genre : Science
Kind : eBook
Book Rating : 804/5 ( reviews)

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Book Synopsis Nonstoichiometric Oxides by : O.T. Soerensen

Download or read book Nonstoichiometric Oxides written by O.T. Soerensen. This book was released on 2012-12-02. Available in PDF, EPUB and Kindle. Book excerpt: 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.

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