METHOD OF DETERMINING TIME-DELAYED CHANGES OF PHYSICAL VALUES DEPENDING ON TEMPERATURE OR MECHANICAL STRESS FOR GLASS OR GLASS-CERAMIC Russian patent published in 2016 - IPC G01N25/02 G01N33/38 G01M11/08 G01N25/72 

FIELD: glass.

SUBSTANCE: invention relates to production or manufacture of articles from glass or glass ceramics. Invention is based on providing production of articles from glass or glass-ceramic having accurately characterized thermomechanical properties. To achieve this purpose deformation of glass or glass-ceramic material is measured at least twice in the form of dependence on time, at different rates of change of temperature or mechanical stress. On the basis of the measurements relaxation time values and weight coefficients are determined by simulating. Then on the basis of the relaxation time and the weight coefficients related to distribution of relaxation processes occurring in the article, time-delayed change of a physical value depending upon temperature or voltage is calculated, such as thermal expansion or refraction index in the form of dependence on preset temperature change or variation of voltage.

EFFECT: technical result is higher accuracy of determining thermomechanical properties of articles from glass or glass ceramics with further use of the information to obtain articles from glass or glass-ceramic having accurately characterized thermomechanical properties.

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