The influence of modification of the glasses composition of the strontium-aluminum-borosilicate system on their technological and physic-chemical properties has been studied. The introduction of two alkalis into the composition of the glass made it possible to significantly reduce the melting temperature from 1500 to 1450 °C and led to changes in the properties of the glasses. When introduced into the composition of glass up to 5 mol. %. The coefficient of thermal linear expansion of alkalis decreased from 58 to 50 (??10–7 К–1), and the refractive index nD – from 1.551 to 1.528. However, alkaline components negatively affect the hydrolytic resistance of glass, transferring them from the I to the II hydrolytic class. The solution to this problem was: 1) the use of mixed alkali effect, 2) the introduction of a small amount of highly effective radiopaque barium oxide into the composition and a significant reduction in the content of less radiopaque SrO in order to maintain high radiopacity, 3) an increase in the content of aluminum oxide, which usually leads to an increase in the chemical resistance of glass. As a result, glasses with high values of radiopacity (~550 %), light transmission (T = 90 %) and with refractive index values of nD = 1.530 and CTE = 56 (??10–7 К–1) were obtained while maintaining chemical resistance to water corresponding to the hydrolytic class.
Enzhegel M. Zinina – Postgraduate student of the Department of Chemical Technology of Glass and Glass-Ceramics, University of Chemical Technology of Russia (Mendeleev University), Moscow, Russia. E-mail: еThis email address is being protected from spambots. You need JavaScript enabled to view it..
Vitalii I. Savinkov – Ph.D. of Engineering Sciences, Chief Specialist of the International Center of Laser Technologies, University of Chemical Technology of Russia (Mendeleev University), Moscow, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Vera F. Posohova – PhD in Chemistry, Member of the Scientific Department, Head of the Central Factory Laboratory “of the experimental VladMiVa”, Belgorod, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Andrei A. Buzov – Ph.D. of Engineering Sciences, Technical Director of the Experimental Plant “VladMiVa”, Belgorod, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Vladimir P. Chuev – Doctor of Technology, professor, general director of the experimental plant “VladMiVa”, Belgorod, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Vladimir N. Sigaev – DSc. in Chemistry, Professor, Head of the Laboratory of Optical Memory on Glass and Head of the Department of Chemical Technology of Glass and Glass-Ceramics, University of Chemical Technology of Russia (Mendeleev University), Moscow, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
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DOI: 10.14489/glc.2023.12.pp.018-024
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