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Description

Result of over twenty years of R&D of optical instruments for the study of the thermo-mechanical behavior of materials, ODP 868 makes possible the analysis of samples beyond the limits of classical heating microscopy. Its versatility makes of ODP 868 the most innovative tool for production and R&D laboratories for the optimization of all the industrial processes that involve thermal cycles.

The Heating Microscope mode uses a 5Mpix high resolution camera to study the physical behavior of the materials during the industrial firing cycles.

With the Morphometrics applicative it is possible, in real-time during the analysis, to automatically calculate and visualize different characteristic temperatures and parameters selectable by the user.

Capable to analyze samples in a wide range of shapes and sizes (for example a 3mm sample and simultaneously a 10mm sample), ODP 868 can simultaneously analyze up to 8  samples of ISO standard size.

The HORIZONTAL DILATOMETER mode has 2 HiRes videocameras and is used to study expansion and shrinkage of samples 30 to 60mm long. It is possible to easily determine the most significant parameters like linear thermal expansion, coefficient of thermal expansion (CTE), glass transition temperature (Tg) and the dilatometric softening temperature.

Used to study the sintering of materials without significant vitreous phases, can follow contractions of up to 50% with heating rates up to 100°C/min. For samples that melt, a disposable holding plate is provided.

The whole measuring system is thermally isolated from the furnace chamber.

FLEXIMETER and ABSOLUTE FLEXIMETER modes, through 3 high resolution independent cameras, enable non-contact bending measurements simulating real industrial heat treatments in order to optimize manufacturing processes of ceramic products as well as have a better and deeper understanding of the materials.

In absolute fleximetry mode the 3 cameras allow to measure simultaneously the sample position in three different points (TA patent), removing the need of a correction curve.

The bending experiments can be carried out on samples 80-85mm or 25-30mm long and it is possible to:

• analyze bending caused by the difference in thermal expansion between coupled materials (i.e.: body and a glaze)
• determine coupling temperature (formerly done with a Steger tensiometer);
• measure bending caused by the difference in sintering behaviour between several coupling materials (i.e.: glaze, engobe and ceramic body);
• measure bending during cooling, caused by the volume variation of the glassy phases;
• study pyroplastic deformation and speed of deformation occurring in the material at high temperature due to its weight;

measure bending caused by absorption of water on one face of the green material.

Software

With Misura 4 Thermal Analysis software it is possible to define, easily and intuitively, analytical methods comprising an unlimited number of segments of unlimited duration and complexity.

Structured in “Apps”, Misura 4 Thermal Analysis software includes instrument control and data analysis for all the five different operating modes.

HSM App allows to run tests of heating microscopy.

Because of Misura 4’s advanced morphometrical applicative for the image analysis, during the sintering process it is possible to automatically detect: characteristic temperatures (sintering beginning, softening, sphere, half-sphere and melting / fusion), flattening curve, contact angle curve, sample area variation curve, ratio curve between width and height, bloating effects, combustion, theoretical glass viscosity (V.F.T. equation) and, optionally, surface tension (glasses) using the Young-Laplace equation.

The recognition of shapes can be done accordingly to a wide range of international standards or to user-defined parameters and concepts.

All the results, the complete series of original frames and the sample shapes are stored in a database together with analytical parameters in a non-proprietary format file. To validate the integrity of the results, the output file is cryptographically validated and signed.

Through the browser-based interface it is possible to access test files and view all the configuration options, analysis results and archived images and:

• print graphs of single tests;
• export images selecting single or multiple frames;
• generate customized, interactive PDF reports;
• export all images in movie format (.AVI) usable in presentations or video reports;
• re-define standard methods to recognize automatically the characteristic temperatures;
• input key data as glass transition temperature (Tg), dilatometric softening temperature softening temperature, hemisphere temperature in order to calculate theoretical viscosity of materials according to V.F.T. equation;
• store analysis and related data without overwriting the original data;
• validate cryptographically the original data.

Files can be opened in a graphic module providing printing and advanced mathematical functionalities.

Multiple tests can be overlapped on the same graph, and all the curves can be displayed or printed separately or overlapped to other curves, also related to tests performed with other thermal techniques.

It is possible to view all the measured parameters characterizing the softening and melting behavior and the fusibility according to international standards.

Graphs can import data from a large variety of formats (CSV, FITS, NPY, QDP, HDF) and drawn in Misura® data sets.

All the graphs have quality and resolution necessary to be edited and to be exported in PNG raster format, PDF or SVG vectorial format.

Furthermore it is possible to open directly and automatically the data archive related to each analysis.

Specifications

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To contact TA Instruments about Optical Dilatometry Platform | ODP 868 use Get a quote.