Optically transparent glass ceramic with low temperature expansion coefficient

The fundamentals of obtaining optically transparent glass-crystalline materials from industrial wastes are considered. The intensity of their transmission spectra in the visible region of the spectrum, the temperature dependence of the logarithm of the resistivity, thermal conductivity, and TCR are studied. It is shown that the addition of 30% lithium oxide to the composition of a glass-crystalline material leads to a decrease in its TCR. Il. 5, bibliography: 11 titles.