Distinctive features of SciGlass 7.0 Professional

In the version 7.0, some significant improvements are made in both functionality and user interface. Because of the lack of room, they will be considered very briefly.

Improved user interface

When starting the program, you receive the main window containing extended toolbar and the task panel in the left side:

By clicking on the command of the task panel, you can directly come to the windows responsible for the main functions of the SciGlass program.

 

The dialog windows allowing to use the main SciGlass functions (building binary plot and ternary property diagrams, choosing the spectral coordinates, adding the new columns to the list of glasses, etc.) are significantly extended and more convenient to use than in the previous versions.

 

Each data-containing program window (list of glasses, list of tables, plot window) has its own toolbar appearing below the main program toolbar that also makes using the main functions more convenient.

Extended functionality

New query type: Search for glasses of similar compositions

As it was stated above, many glass property data, especially recently published ones, contain large experimental errors. Therefore, specialists should treat the published data about glass properties with some criticism.

 

The best way to make you sure in reliability of glass property data is to compare them with other data about the same property of glasses of the same or close compositions, which were obtained in the independent way.

 

In SciGlass 7.0, there is a special interface for such comparison. Let us assume that you would like to check the reliability of the Tg value for the industrial glass Corning™ 7020 presented in the paper by D.J. O’Brien, 1992 (see the table below).

 

For that, please select the corresponding row in the table and then click on the line “Similar compositions” in the task panel (or use the menu command Options à Search for Similar Compositions). You receive the query window. Press the button “Paste Composition” to insert the composition of the glass under the interest into the query. (You may also input a composition manually.) Then select the property (Tg) from the dropdown list in the “Property” field. Thus, you have filled out the query form (see the figure below).

 

Finally, you should press the button “Run” to get the query results, i.e. the list of glasses of similar compositions. The higher the glass is placed in the table, the closer its composition to the glass under the interest is; the sought composition itself is always in the first row of the list.

 

As we can see, the Tg values for glasses of the closest compositions (a few upper rows) are close to the above-presented value (712oC). This means that the value under test is quite credible.

Building the plot and working with the plot windows

In the version 7.0, it is possible to build the plot in three kinds of coordinates (for each axis): normal (linear), reciprocal, and logarithmic. It could help you for instance when analyzing the viscosity data presented in the original tables (see the figures below).

To change the kind of the coordinates, double click on the axis title. The window appears, where you may also prescribe the axis limits and increment (the last option is available only for the axes shown in the normal coordinates).

 

Besides, it is possible to use the mathematical functions of concentrations and the properties. In particular, you may plot the refraction ratio (nd-1)/d (where nd is the refractive index for the wavelength ~589 nm, and d is the density at room temperature) as a function of the molar ratio Na2O/B2O3 for the glasses belonging to the system Na2O-B2O3-SiO2 with 75 mol.% SiO2 (see the picture below).

Transformation of the spectral coordinates

In the previous versions of SciGlass, a user should manually specify the additional information about the presented glasses: formula of colorant, refractive index, thickness, and density, regardless of whether they are presented in the original publications or not. It is not convenient. Besides, it is impossible to specify different property values for individual glasses that might sometimes lead to considerable errors when recalculating spectral coordinates.

 

In the version 7.0, most of these problems are solved. It is possible to specify the property data separately for each glass. At that, if the property data are contained in an original publication, the program automatically considers them. Moreover, even if these data are absent, the program proposes to use the values or the refractive index and density calculated from the glass composition. The last function is available for oxide, fluoride, and chalcogenide glasses.

Thus, in the overwhelming majority of practical cases, a user should not worry about the properties of glasses, which spectra are to be recalculated into another coordinates.

Ternary property diagrams

In the previous versions, the list of components available for building the diagrams is limited by several dozen “basic” components. Besides, a user cannot use the atomic percent for this kind of diagram. In the version 7.0, these limitations are overcome so that you can select any component presented in the database and use any kind of percent.

 

Besides, the program can build the isolines of two kinds: based on the property values calculated from chemical composition, or built by using the polynomial fit of the experimental data. The latter option is especially useful if no method for calculation of the property under the interest within the selected ternary system exists.

Working with the list of glasses

Here, several new features are introduced into the program. The most important of them is the possibility to view the number of glasses containing each chemical element in the glasses satisfying the specified requirements. For that, you could use the menu command Display à Distribution of Chemical Elements. Below, the result of this operation is presented for the query for glasses having Littleton (softening) point not more than 715oC and thermal expansion coefficient below Tg between 46.10‑7 and 54.10‑7 K-1.

As we can see, the most of these glasses belong to the system R2O-ZnO-PbO-Al2O3-B2O3-SiO2. This information might be very helpful when developing the new glass compositions with the prescribed set of properties.

 

This option is available for the list of glasses obtained from all three types of search: for experimental data, predicted properties, and similar compositions (see above).

Conclusion

As follows from the above-stated, SciGlass Information System allows to solve various problems of both fundamental and applied glass science connected with physical and physicochemical properties of glasses and melts:

 

  • Search for the information about glass and melt properties published worldwide starting from 1880th;
  • Studying the concentration and temperature dependences of glass and melt properties;
  • Prediction of multiple properties from chemical composition and temperature;
  • Optimization of the glass compositions;
  • Search for new prospective compositions of glasses satisfied multiple property requirements;
  • Check-up the reliability of published property data;
  • etc.

 

It is unlikely possible to describe all features and functions of the SciGlass in this brief review. Only the most important of them (to the point of view of the authors of SciGlass) are described above.

 

For more details, please see the following papers and the references therein:

 

O. V. Mazurin, Glass properties: compilation, evaluation, and prediction, J. Non-Cryst. Solids, 2005, vol. 351, N 12-13, p. 1103-1112.

 

A. I. Priven, General Method for Calculating the Properties of Oxide Glasses and Glass-Forming Melts from their Composition and Temperature, Glass Technology, 2004, vol. 45, N 6, p. 244-254.

 

A. I. Priven and O. V. Mazurin, Comparison of methods used for the calculation of density,refractive index and thermal expansion of oxide glasses, Glass Technology, 2003, vol. 44, N 4, p 156-166.

 

O. V. Mazurin, Information Systems for Properties of Glasses and Other Materials: Principles of Design, Glass Physics and Chemistry (Engl. translation of Rus. Fizika i Khimiya Stekla), 1997, vol. 23, N 3, p. 176-185.