Welcome to Version 5.2

This version of the comprehensive, searchable PED application, NIST Standard Reference Database 31, provides 33,000 phase equilibrium diagrams with fundamental information needed to discover or optimize materials for numerous applications ranging from semiconductors to cement to biomarkers. 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.

This application 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 (2005), publication transitioned to all- electronic; the latest content-update, Volume 26, is provided in this release of the database.

As for all series-5 versions, v 5.2 features the new JavaScript PED diagram viewer for interactive display of the diagrams (see Viewer Help next to the main Help menu). TThe PED application is now self-contained and no longer requires installation of Java, although diagrams can still be downloaded and opened using the legacy (Java-based) PED Viewer (see Help menu for details). Users are invited to submit feedback to phase3@ceramics.org. The search interface for Version 5.2 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). TThe 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.

Materials researchers please note: The PED Editor digitization program is available as a 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 series-5 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 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, batteries, photovoltaics, video displays, lasers, spintronics, data-storage, electrolytic refining, metallurgical processing, semiconductor manufacturing, bioceramics, and dental restoration.

The Version 5.2 content-update provides Volume 26, with 170 new Figures and 767 new diagrams containing information for more than 200 material-systems not previously covered by the database. The new content in this version continues to reflect the explosion of research on the fundamental properties of materials needed to enable the transition to green-energy technologies and sustainable approaches to manufacturing, including the processing of raw materials and recycling/recovery of critical metals from secondary sources or low-grade ores. New chemical systems and diagrams in v.5.2 address needs to advance a wide variety of applications including hydrogen-production by electrolysis of water, thermal-energy storage and heat-transfer media for concentrated solar power (CSP), advanced molten-salt nuclear reactors (complex salt systems for fuel; thorium fuel-cycle; corrosion), lead-free photovoltaics with high conversion efficiencies, optical information-processing, batteries, semiconductors (processing; new materials for next-generation electronics and solar cells), lasers for optoelectronics, and advanced dental porcelain.

Before using Version 5.2 please see Information You Need to Use this Application .

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