Jacob Greenberg – författare
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5 produkter
5 produkter
459 kr
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354 kr
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683 kr
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As part of the global Governing Uranium Project headed by the Danish Institute for International Studies (DIIS), the Center for Strategic and International Studies (CSIS) analyzed U.S. experiences with the security of its “front-end” uranium industry. This report examines current U.S. regulation and industry practices regarding security measures and controls over natural uranium prior to enrichment. Topics include prudent management practices, export-import controls, transportation, physical protection, and material accounting. The report highlights security analysis on uranium mining, milling, and conversion, which have historically enjoyed less proliferation scrutiny than other components of the nuclear fuel cycle.
Thermodynamic Basis of Crystal Growth
P-T-X Phase Equilibrium and Non-Stoichiometry
Inbunden, Engelska, 2001
1 078 kr
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This book covers the thermodynamic foundations of inorganic materials science and the controlled synthesis of inorganic materials. A new thermodynamic approach to the non-stoichiometry of crystalline solids, known as vapor pressure scanning, has been developed by the author and is described in detail in this book. It is based on the high-precision experimental determination of the boundaries of the single-phase volume of the solid in the pressure-temperature-composition P-T-X phase space. This approach has been tested on a number of inorganic materials and has been shown to have an unparalleled precision (up to 10-4 at. per cent) in the determination of non-stoichiometry directly at high temperatures (up to 1200? C). Along with the results obtained by the author and his colleagues, the P-T-X diagrams of other important materials (e.g. , III-V, IV-VI semiconductors) are also discussed.
Del 44 - Springer Series in Materials Science
Thermodynamic Basis of Crystal Growth
P-T-X Phase Equilibrium and Non-Stoichiometry
Häftad, Engelska, 2010
1 078 kr
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It is particularly symptomatic that a volume concerning P-T-X phase equilibrium should appear in the Materials Science Series. Entering the 21st century, progress in modern electronics is increasingly becoming associated with devices based not only on silicon but also on chemical compounds. These include both semiconduc tors and, in the last 15 years, multinary oxides with high-To superconductor properties. The critical role of chemical processes in the technologies of these materials is quite evident, and in recent years has stimulated vigorous research activity in the physical chemistry of materials, resulting in a renaissance of this field. The leading role in these efforts belongs to thermodynamics, in particular, computer modeling of chemical processes, phase equilibrium, and controlled synthesis of inorganic materials with preliminary fixed stoichiometric composition. Especially important contributions have been made regarding non stoichiometry and our understanding of the crucial relationship between composition and properties of the materials since the development of the vapor pressure scanning approach to the phenomenon of non-stoichiometry. This method of the in situ investigation of the crystal composition directly at high temperatures 3 4 proved to be of an unparalleled precision of 10- _10 at. % and made it possible to obtain in an analytical form functional dependences of the crystal composition on temperature, pressure, and composition of the crystallizing matrix for crystals with sub-O. l at. % range of existence.