Glass databases

Glass databases are a collection of glass compositions, glass properties, glass models, associated trademark names, patents etc. These data were collected from publications in scientific papers and patents, from personal communication with scientists and engineers, and other relevant sources.

History

Since the beginning of scientific glass research in the 19th century thousands of glass property-composition datasets were published. The first attempt to summarize all those data systematically was the monograph "Glastechnische Tabellen".[1] World War II and the Cold War prevented similar efforts for many years afterwards. In 1956 "Phase Diagrams for Ceramists" was published the first time, containing a collection of phase diagrams.[2] This database is known today as "Phase Equilibria Diagrams".[3] In 1991 the Japanese database Interglad was created,[4] followed by the publication of the "Handbook of Glass Data" in 1993.[5] The "Handbook of Glass Data" was later digitalized and substantially expanded under the name SciGlass.[6] Currently, SciGlass contains properties of about 350,000 glass compositions, INTERGLAD about 300,000, and "Phase Equilibria Diagrams" includes about 20,000 diagrams.

Glass database contents

The following list of glass database contents is not complete, and it may not be up to date. For full features see the references section below. All databases contain citations to the original data sources and the chemical composition of the glasses or ceramics.

  • SciGlass: Viscosity, density, mechanical properties, optical properties (including optical spectra), thermal expansion and other thermal properties, electrical properties, chemical durability, liquidus temperatures, crystallization characteristics, ternary diagrams of glass formation, glass property calculation methods, patent and trademark index, subject index etc.
  • Interglad: Viscosity, density, mechanical properties, optical properties, electrical properties, statistical analysis, liquidus temperatures, ternary property diagrams
  • Phase Equilibria Diagrams: Phase diagrams, including liquidus and solidus temperatures, eutectic points, crystalline phases, primary crystalline phases

Application
  • Experimental planning, expected properties and appropriate glass compositions can be estimated from similar data.
  • Calculation of glass properties based on many independent data sources.
  • Scientific understanding of glass composition-property relations.
  • Design of glass compositions that are not patented by the competition.
  • System design and optimization including design for purpose and design for cost.[7]
gollark: Any opinions on my theory of what's going on with the pricing? Basically, I said that if extra dragons are introduced to the total but not the rest of the system (golds, whatever else), then rarer stuff's ratios will be affected more than common stuff, so the gold pricing goes crazy and nebulae stay the same.
gollark: 3.
gollark: My theory of what's up, copied from the forum thread:If many new eggs are being introduced to the system, then that will most affect the stuff which is rarest, by making it rarer by comparison, but commons will stay the same. As for why it happened now? Weekly updates, possibly.Example:Imagine there are 200 dragons, 5 of which are golds.The ratio of golds to total dragons is now 5:200 = 1:40. If the target ratio is 1:50 then prices will be higher to compensate.Now imagine there are an extra 200 dragons added, none of which are golds.The ratio would then be 5:400 = 1:80. Then, assuming the same target, prices will drop.This is of course simplified, and the ratios may not work like this, but this matches observed behavior pretty well.
gollark: That why was rhetorical.
gollark: As I said on the forums:```That makes sense. If many new eggs are being introduced to the system, then that will most affect the stuff which is rarest, by making it rarer by comparison, but commons will stay the same. As for why it happened now? Weekly updates, possibly.```

References
  1. "Glastechnische Tabellen" (engl.: Glass Technical Tables), edited by W. Eitel, M. Pirani, and K. Scheel, Springer Verlag, Berlin, 1932
  2. Levin, E.M., McMurdie, H.F., and Hall, F.P., Phase Diagrams for Ceramists: Volume 1, The American Ceramic Society, Columbus, Ohio, p. 6, 1956.
  3. Phase Equilibria Diagrams Database
  4. "INTERGLAD". Archived from the original on 2007-12-17. Retrieved 2007-12-03.
  5. "Handbook of Glass Data", edited by O. V. Mazurin, M. V. Streltsina, and T. P. Shvaiko-Shvaikovskaya, Elsevier, 1993
  6. SciGlass Archived 2007-10-16 at the Wayback Machine
  7. http://www.lacroixoptical.com/lacroix-notes/content/glass-types-material-selection-tool-edition-2-0
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