Measurements of physical properties of glasses, melts, and other materials
LGP provides precise measurements of glasses and melts properties, which are required for accurate computer modeling of glass melting and processing. The measurements are performed using original automated equipment designed by leading glass scientists and engineers.
At present the following measurements can be made by your orders:
Absorption spectra of semi-transparent solids (glasses, ceramics, glassceramics, etc.) and melts in the temperature range 20 ÷ 1500°C. Wavelength range from near UV to mid infrared is covered. Spectra of molten glasses having high, medium or low transparency, easily crystallizing or degassing, and having unstable red-ox state can be measured accurately. Radiative thermal conductivity and emissivity for optically thick and thin glass (melt) layers are determined using accurate mathematical methods;
Density of glasses and melts within the temperature range 20 ÷ 1400°C;
Viscosity of glasses and melts within the range of Log (η, Pois) from 1.5 to 13.5 (at temperatures up to 1400°C);
CTE of solid and viscous materials up to 1400°C;
Characteristics of structural and stress relaxation;
Delayed elasticity;
Force of adhesion (sticking) of glass to metal, ceramics, or other inorganic materials up to 800°C at variable loading;
Thermal conductivity of glass-to-metal and glass-to-ceramics interfaces at maximal temperature gradient up to 1000°C;
Reflection spectra of coated and uncoated surfaces of different materials up to 800°C;
Spectral emissivity of different opaque materials (ceramics, metals, etc.) up to 800°C;
Studies of processes in molten glasses at high temperatures by high-temperature digital telescope (HTDT). This experimental technique, developed under support of PPG Ind. Inc., allows us to observe growth of bubbles and crystals in melts, deformation of glass objects under applied force, etc. Images of molten glass can be taken by HTDT simultaneously with the measurements of absorption spectra.
Mechanical, dielectric, and other properties can be measured by special requests in cooperation with our partners from different research institutions.
