Glass databases are a collection of

glass Glass is a non-crystalline, often transparent, amorphous solid that has widespread practical, technological, and decorative use in, for example, window panes, tableware, and optics. Glass is most often formed by rapid cooling ( quenching ...

compositions, glass properties,

glass model 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 t ...

s, associated

trademark A trademark (also written trade mark or trade-mark) is a type of intellectual property consisting of a recognizable sign, design, or expression that identifies products or services from a particular source and distinguishes them from othe ...

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 enabling disclosure of the invention."A ...

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, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing ...

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. This database is known today as "Phase Equilibria Diagrams". In 1991 the Japanese database Interglad was created, followed by the publication of the "Handbook of Glass Data" in 1993. The "Handbook of Glass Data" was later digitalized and substantially expanded under the name SciGlass. 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

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, porcelain ...

s. *''SciGlass'':

Viscosity The viscosity of a fluid is a measure of its resistance to deformation at a given rate. For liquids, it corresponds to the informal concept of "thickness": for example, syrup has a higher viscosity than water. Viscosity quantifies the inte ...

density Density (volumetric mass density or specific mass) is the substance's mass per unit of volume. The symbol most often used for density is ''ρ'' (the lower case Greek letter rho), although the Latin letter ''D'' can also be used. Mathematical ...

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

chemical durability Corrosion is a natural process that converts a refined metal into a more chemically stable oxide. It is the gradual deterioration of materials (usually a metal) by chemical or electrochemical reaction with their environment. Corrosion engine ...

liquidus temperature The liquidus temperature, TL or Tliq, specifies the temperature above which a material is completely liquid, and the maximum temperature at which crystals can co-exist with the melt in thermodynamic equilibrium. It is mostly used for impure subst ...

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 Solidus (Latin for "solid") may refer to: * Solidus (coin), a Roman coin of nearly solid gold * Solidus (punctuation), or slash, a punctuation mark * Solidus (chemistry), the line on a phase diagram below which a substance is completely solid * ...

temperatures,

eutectic point A eutectic system or eutectic mixture ( ) is 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 ''eutectic tempe ...

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 t ...

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

ed by the competition. *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