Book ChapterDOI
Chapter 190 Phase diagrams and thermodynamic properties
Pavel Karen,Arne Kjekshus +1 more
TLDR
In this paper, the phase diagrams and thermodynamic data for selected cuprates of alkaline-earth (A) and rare earth (R) elements except Sc, along with the binary to quintenary oxides, and relevant solid-solution series with other elements.Abstract:
Publisher Summary This chapter presents the phase diagrams and thermodynamic data for selected cuprates of alkaline-earth (A) and rare-earth (R) elements except Sc, along with the binary to quintenary oxides, and relevant solid-solution series with other elements. Short information on crystal structure is listed for each phase giving it its identity, as well as the concise chemical information which defines its character. The chemistry of phases is illustrated in mostly subsolidus isothermal phase diagrams, drawn after original sources, and referring to diverse chemical conditions defined by partial pressures of oxygen in particular. Reactivity towards CO2 and formation of oxide carbonates are treated systematically as well, having been one of the major experimental obstacles in pursuit of data relevant to pure oxides. The chapter also discusses the essential thermodynamic data for evaluations of phase equilibria appear in the form of entropies and enthalpies at standard and phase-transition temperatures together with heat-capacity functions. Other possibilities are temperature polynomials for standard Gibbs energies of formation or for partial pressures of gaseous components.read more
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Journal ArticleDOI
Thermodynamics of solid phases containing rare earth oxides
Alexandra Navrotsky,Wingyee Lee,Aleksandra Mielewczyk-Gryń,Sergey V. Ushakov,Andre Anderko,Haohan Wu,Richard E. Riman +6 more
TL;DR: In this article, a review of rare earth elements (RE) is presented, in one compilation, the thermodynamic properties of a large number of such materials and discusses systematic trends in energy and the factors controlling stability.
Journal ArticleDOI
Nonstoichiometry in oxides and its control
TL;DR: In this paper, a point-defect scheme is presented for describing oxygen nonstoichiometry in extended structures of oxides, and two cases of nonstochychometry are treated; a narrow-range nonstoeichiometry centered at an integer valence state of the non-oxygen atom, and a wide-range nonsmootheometry extending between two integer structures.
R edetermination of the Structure of Gd 2CUO4: A Site Population Analysis
TL;DR: In this paper, the positions determined were significantly displaced from those obtained by Kierkegaard, and the authors wish to thank the ILL, Grenoble, for the use of neutron beam facilities.
Journal ArticleDOI
Heterogeneous nucleation of YBCO via fluorine based MOD process: thermodynamic and kinetic approach
Comments on the phase diagrams and crystallisation paths of Y-Ba-Cu-O materials
TL;DR: In this paper, micro structural characterisation of Y-Ba-Cu-O quenched partial melts is presented, showing that the BaCuO2 (BC1) phase is crystalline at temperatures as high as 1100°C, and that the partial melt self-establishes a micro structural gradient from the surface towards the interior of the samples, which can be associated with a gradient in an equivalent partial pressure of O2 (pO2).
References
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Book
Binary alloy phase diagrams
TL;DR: Binary Alloy Phase Diagrams, Second Edition, Plus Updates, on CD-ROM offers you the same high-quality, reliable data you'll find in the 3-volume print set published by ASM in 1990.
Journal ArticleDOI
Possible high Tc superconductivity in the Ba-La-Cu-O system
TL;DR: In this paper, Ba−La−Cu−O system, with the composition BaxLa5−xCu5O5(3−y) have been prepared in polycrystalline form, and samples with x=1 and 0.75,y>0, annealed below 900°C under reducing conditions, consist of three phases, one of them a perovskite-like mixed-valent copper compound.
Book
Thermochemical data of pure substances
TL;DR: In this article, the first law of thermodynamics and the third law of Nernst heat theorem are used to construct tables of thermochemical data of pure substances, which are then used for thermodynamic calculations.
Journal ArticleDOI
SGTE data for pure elements
TL;DR: In this article, the authors present the data for the condensed phases of 78 elements as currently used by SGTE (Scientific Group Thermodata Europe) as a sound basis for the critical assessment of thermodynamic data, thereby, perhaps, limiting unnecessary duplication of effort.
Book
Thermochemical properties of inorganic substances
Ihsan Barin,Ottmar Knacke +1 more
TL;DR: In this paper, a volume of tables conveying the thermochemical parameters of more than 2000 substances, cover enthalpy, entropy, chemical potential and Planck's function, and commentaries on the chemical reactions of the relevant component and indications of stability/metastability.