Diffusion And Ionic Conduction In Oxides

This special issue collects together relevant data spanning the quarter-century from 1982 to 2007. It comprises 936 entries, 220 tables and 44 figures. Wherever possible, the data are presented as Arrhenius expressions, giving a total of 304. The materials covered number 410 in all and include oxides based upon aluminium, barium, bismuth, boron, caesium, calcium, cerium, chromium, cobalt, copper, erbium, gadolinium, gallium, germanium, indium, iridium, iron, lanthanum, lead, lithium, magnesium, manganese, mercury, molybdenum, neodymium, nickel, niobium, phosphorus, plutonium, potassium, praseodymium, ruthenium, samarium, scandium, silicon, sodium, strontium, tantalum, tellurium, terbium, thorium, tin, titanium, tungsten, uranium, vanadium, ytterbium, yttrium, zinc and zirconium, plus their many compounds and solid solutions. Altogether, this volume provides a wealth of information on the topic.

This book reports a study of a class of Dion–Jacobson-type layered perovskite oxides in which high oxide-ion conductivities in phases were discovered for the first time in the world. The oxide-ion conductors are important in various energy conversion devices and environmental protection applications such as solid-oxide fuel cells, oxygen gas sensors, oxygen separation membranes, and oxygen-based catalysts. The discoveries are based on a new screening method, called the bond valence method, combined with an original design concept. The present finding of high oxide-ion conductivity reported in the thesis suggested the potential of Dion–Jacobson phases as a platform to identify superior oxide-ion conductors. To understand what causes such high oxide-ion conductivities in these layered perovskite oxides, the author analyzed their crystal structures at high temperature and described the relationship between oxide-ion conductivities and their crystal structures. A deep understanding of the mechanisms of oxide-ion diffusivity at an atomic level in the Dion–Jacobson phases is clarified. The discovery of these materials, the new screening method, and the original design concept make possible the realization of many environment-friendly technologies. The findings in this thesis facilitate the possibilities for many novel applications that will help lead to a sustainable future.

Transition metal oxides form a series of compounds with a uniquely wide range of electronic properties. The main aim of this book is to describe the varied electronic behaviour shown by transition metal oxides, and to discuss the different types of theoretical models that have been proposed to interpret this behaviour.