Version 4 of Phase Equilibria Diagrams is dedicated to the memory of Dr. Robert S. Roth (1926 - 2012). More than any other individual, Bob Roth's efforts, energy, and scientific leadership shaped the content and quality of the information this database provides to the materials community. In addition to serving as Editor-in-Chief for 15 years, Bob was personally responsible for the general editing of more than half of the published materials, laboring tirelessly to produce high-quality, critically evaluated data consistent with the alternative title of this series, NIST Standard Reference Database 31.

Welcome to Version 4.4

Version 4.4 is very similar to the previous version and functions with the same software that resulted from a comprehensive upgrade of the content management system (CMS), the user interface, and the graphics digitization program (PED Editor). The new CMS is a custom-developed web-based system running under Ubuntu Linux using the Ruby programming language. The system uses Nginx web server, an SQLite database, and an object relational mapper for the GUI.

Materials researchers please note: The PED Editor, developed at NIST by Eric Boesch, is available for free download and can be used 1) to digitize phase diagrams and 2) to extract data from phase diagrams or other two-dimensional scientific drawings -see http://www.nist.gov/srd/nist31.cfm.

As in the previous version, the new search interface is browser-based and includes help icons at each user-input location. In addition to the previously available search criteria (chemical system, author, etc.) users are now able to perform keyword searches of the critical evaluations of all 19,582 entries, allowing them to associate material systems with potential applications mentioned in the text. In addition, all 29,349 diagrams in the collection are now present in an updated format using the new PED Editor program, enabling all diagrams to be printed as high-quality .pdf files. The PED Editor is a custom-developed Java program which uses the iText open-source PDF file generation library, Batik open-source SVG file generation library, Jackson open-source JSON file generation library, and the JAMA Java Matrix package.

Version 4.4 provides 374 new entries (Figs. 16,591-16,964, electronic Volume 22 ) with 772 new diagrams. The comprehensive, searchable application includes all the information printed in the 21 hard-copy volumes as well as "virtual" Volumes 15, 16, special-Volume P (phosphorus-containing) as well as all other special-issue topical volumes, and 17-22. (Publication of hard-copy books was discontinued after Vol. 14.) The data include experimental and calculated diagrams for a wide range of non-organic material-types including oxides and mixed systems with oxides, chalcogenides (sulfides, selenides, tellurides), pnictides (N, P, As, Sb, Bi), actinides (U, Pu, Th) and actinide-surrogates (Ce), oxy-cation systems (e.g. molybdates, vanadates), semiconductors (Si, Ge, Sn), group 3 systems (B, Al, Ga, In, Tl), and salts including mixed systems with salts. The data are pertinent to a wide variety of applications including optoelectronics, thermal-barrier coatings, sensors, energy converters, nuclear-waste reprocessing, nuclear-reactor technology, photovoltaics, pigments, fuel cells, catalysts, thermoelectrics, capacitors, transducers, thermoluminescence, batteries, photovoltaics, electrolytic refining, and semiconductor manufacturing. The new figures are labeled as Volume 22 in this release and reflect the recent emphasis in research efforts on materials of interest for a variety of emerging energy and other advanced applications. These include heat-transfer and thermal-energy-storage media for nuclear as well as concentrated solar power; molten-salt Generation IV nuclear reactors; next-generation batteries including micro-batteries; recovery/recycling of rare earths; semiconducting systems for laser diodes, photoluminescence, solar cells, displays, and bio-medical sensors; non-linear optics; spintronics (topological insulators); photoelectrodes (mixed ionic-electrical conductors); carbon-storage in the earth's mantle; metallurgical processing methods with reduced carbon emissions; electroceramics for dielectric applications; and glass-ceramics for dental restoration materials.

In order to use Version 4.4 you must first install other software - please see Information You Need to Run this Application  and follow the directions given there.

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