Impact and Customers:
Every deliberate effort to develop a new ceramic or to improve processing begins with chemical composition and the conditions (temperature, pressure) under which pure compounds and their mixtures are stable (an equilibrium phase diagram). In the absence of such information, developers must resort to trial-and-error approaches or conduct their own studies to obtain the data.
- 24,800 diagrams in 21 hard-copy volumes, CD-ROM versions and a new web platform; more than 60,000 units sold worldwide
- About 1,000 new diagrams released annually
- Annual sales of $200,000 to $300,000
- 300 to 400 website hits per month at http://www.nist.gov/srd/nist31.cfm
- 40 to 60 downloads per month of demonstration version from NIST Standard Reference Data website
- Customers: Materials developers in industry, government and academia
NIST Standard Reference Database 31, published from 1964 to 1992 as the well-known Phase Diagrams for Ceramists "blue books," is the result of a long-standing collaboration between NIST and The American Ceramic Society to develop and maintain a state-of-the-art database of critically evaluated phase equilibria data for industrial and academic customers. In 1992, the title was changed to the more general "Phase Equilibria Diagrams" to emphasize that the data are useful to the broader inorganic materials community. Standard Reference Database 31 serves as the only "Mapquest" database for ceramic and inorganic systems: The diagrams provide maps of the equilibrium chemical and structural behaviors exhibited by materials and provide critical starting information for the rational design of materials-processing schemes and for quality assurance efforts and optimization of the physical and chemical properties of advanced materials.