Glass databases are a collection of

glass Glass is an amorphous (non-crystalline solid, non-crystalline) solid. Because it is often transparency and translucency, transparent and chemically inert, glass has found widespread practical, technological, and decorative use in window pane ...

compositions, glass properties, glass models, associated

trademark A trademark (also written trade mark or trade-mark) is a form of intellectual property that consists of a word, phrase, symbol, design, or a combination that identifies a Good (economics and accounting), product or Service (economics), service f ...

names,

patent A patent is a type of intellectual property that gives its owner the legal right to exclude others from making, using, or selling an invention for a limited period of time in exchange for publishing an sufficiency of disclosure, enabling discl ...

s 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".

World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

and the

Cold War The Cold War was a period of global Geopolitics, geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc, which lasted from 1947 unt ...

prevented similar efforts for many years afterwards. In 1956, "Phase Diagrams for Ceramists" was published the first time, containing a collection of phase diagrams. This database is known today as "Phase Equilibria Diagrams". in 1983, the "Handbook of Glass Data" was published, followed by the creation of the Japanese database Interglad in 1991. The "Handbook of Glass Data" was later digitalized and substantially expanded under the name SciGlass. Currently, SciGlass contains properties of about 400,000 glass compositions, INTERGLAD about 380,000, and "Phase Equilibria Diagrams" includes about 31,000 diagrams. in 2019, the SciGlass data was made publicly available on GitHub under the ODC Open Database License (ODbL). In 2023, the re-emergence of the SciGlass database as SciGlass Sage offered "AI" assistance, a property predictor powered by

random forest Random forests or random decision forests is an ensemble learning method for statistical classification, classification, regression analysis, regression and other tasks that works by creating a multitude of decision tree learning, decision trees ...

regression models, and a generator using predictive models in conjunction with

genetic algorithm In computer science and operations research, a genetic algorithm (GA) is a metaheuristic inspired by the process of natural selection that belongs to the larger class of evolutionary algorithms (EA). Genetic algorithms are commonly used to g ...

s. In 2024, '
SciGlass Next
'' was created as an open-access web database utilizing the SciGlass data available on GitHub. The database is hosted in the public domain of

Friedrich Schiller University Jena The University of Jena, officially the Friedrich Schiller University Jena (, abbreviated FSU, shortened form ''Uni Jena''), is a public research university located in Jena, Thuringia, Germany. The university was established in 1558 and is cou ...

. The website provides comprehensive documentation, including step-by-step instructions and glossaries of properties and symbols used. Most features are covered, including: * Glasses: 422,000+ glasses and melts. Sourced from 40,000+ literature sources, including 19,700+ patents. * Data Tables: Search data and export tables for post-processing. * Data Visualization: Interactive data visualization with scatter plots, histograms, ternary plots, and curve fitting. * Authentication: Secured Single Sign-On (SSO) authentication of users. * ML Predictions (Future): Python-backed ML predictions for glass properties. * Sidebar Quick Lookup: Categories of patent index, trademark index, author index, subject index, spectral index and glass formation. SciGlass Next Statistics - 2025-02-06

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

ceramic A ceramic is any of the various hard, brittle, heat-resistant, and corrosion-resistant materials made by shaping and then firing an inorganic, nonmetallic material, such as clay, at a high temperature. Common examples are earthenware, porcela ...

s. *''SciGlass'':

Viscosity Viscosity is a measure of a fluid's rate-dependent drag (physics), resistance to a change in shape or to movement of its neighboring portions relative to one another. For liquids, it corresponds to the informal concept of ''thickness''; for e ...

density Density (volumetric mass density or specific mass) is the ratio of a substance's mass to its volume. The symbol most often used for density is ''ρ'' (the lower case Greek letter rho), although the Latin letter ''D'' (or ''d'') can also be u ...

, mechanical properties, optical properties (including optical spectra), thermal expansion and other thermal properties, electrical properties, chemical durability,

liquidus temperature While chemically pure materials have a single melting point, chemical mixtures often partially melt at the temperature known as the solidus (''T''S or ''T''sol), and fully melt at the higher liquidus temperature (''T''L or ''T''liq). The solidus ...

s, crystallization characteristics, ternary diagrams of glass formation, glass property calculation methods, patent and trademark index, subject index etc. *''Interglad'':

, mechanical properties, optical properties, electrical properties, statistical analysis, liquidus temperatures, ternary property diagrams *''Phase Equilibria Diagrams'': Phase diagrams, including liquidus and solidus temperatures,

eutectic point A eutectic system or eutectic mixture ( ) is a type of a homogeneous mixture that has a melting point lower than those of the constituents. The lowest possible melting point over all of the mixing ratios of the constituents is called the ''eute ...

s, crystalline phases, primary crystalline phases

Application

*Experimental planning, expected properties and appropriate glass compositions can be estimated from similar data. *

Calculation of glass properties The calculation of glass properties (glass modeling) is used to predict glass properties of interest or glass behavior under certain conditions (e.g., during production) without experimental investigation, based on past data and experience, with ...

based on many independent data sources. *Scientific understanding of glass composition-property relations. *Design of glass compositions that are not

ed by competitors. *System design and optimization including design for purpose and design for cost.

References

{{Glass science Glass engineering and science Glass chemistry Chemical databases Ceramic materials