Welcome to Version 5.0

The comprehensive, searchable PED application, NIST Standard Reference Database 31, includes all content previously published in the hard-copy series of numbered "blue" books (Phase Diagrams for Ceramists; Phase Equilibria Diagrams) as well as all special-issue topical volumes. After Volume 14, publication transitioned to all- electronic; the latest content-update, Volume 24, is provided in this release of the database. Version 5.0 provides approximately 31,500 phase equilibrium diagrams that provide fundamental information needed to develop new materials — and improve existing ones — for numerous applications ranging from semiconductors to cement. 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.

Version 5.0, following version 4.5, introduces a new JavaScript PED diagram viewer for interactive display of the diagrams (see Viewer Help next to the main Help menu). The PED application no longer requires the installation of Java, although diagrams can still be downloaded and opened using the legacy (Java-based) PED Viewer (see Help menu for details). The search interface for Version 5.0 is very similar to the previous series-4 versions 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 (developed by Prometheus Computing, LLC) uses the Nginx web server, an SQLite database, and an object relational mapper for the GUI. Users may submit feedback to phase3@ceramics.org.

Materials researchers please note: The PED Editor 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 https://www.nist.gov/srd/nist-standard-reference-database-31 and https://pages.nist.gov/PEDEditor/.

As in the series-4 versions, the 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 PED Figures, allowing them to associate material systems with potential applications mentioned in the text. All PED Figures are available as printable .pdf files which provide the commentary text as well as all diagrams, similar to the previous entries in the hard-copy books. In addition, all phase diagrams in the collection are now present in an updated format, can be interactively displayed using the PED Viewer, and can be printed as high-quality .pdf files or downloaded as .png or .jpg files with customized resolution.

Materials covered by this database are used across a broad spectrum of technologies in applications such as optoelectronics, thermal-barrier coatings, chemical sensors, energy converters, solar cells, nuclear-waste reprocessing, nuclear-reactor technology, photovoltaics, pigments, fuel cells, catalysts, thermoelectrics, capacitors, transducers, thermoluminescence, molten-salt batteries, photovoltaics, video displays, lasers, spintronics, data- storage, electrolytic refining, metallurgical processing, semiconductor manufacturing, bioceramics, and dental restoration.

The Version 5.0 content-update provides Volume 24, with 161 new entries and 642 new diagrams – 127 of which are for material-systems not previously covered by the PED database. The new content is dominated by the results from currently intensive research on materials needed for emerging energy technologies, including molten-salt advanced nuclear reactors, nuclear fuel/waste reprocessing, heat-transfer and/or -storage in nuclear as well as concentrated solar power, and next-generation batteries. Other systems emphasized in the newly added diagrams reflect the current interest and study of materials for optical transistors, topological insulators and quantum computing, capture of carbon dioxide from flue gases, non-polluting "green" structural composites (CBFs, Continuous Basalt Fibers), photocatalysts for water-purification or hydrogen-production from water, recycling/recovery of key metals including rare earths and actinides, medical radiotherapeutics, metallurgical processing with reduced carbon emissions, high-intensity large-area lighting, and functional devices controlled by a magnetic field.

Before using Version 5.0 please see Information You Need to Use this Application .

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