Glass Formation Region and Order of Formation
of Crystalline Phases in the SrOB₂O₃SiO₂ System

N. G. Tyurnina*, O. L. Belousova, A. I. Domanskii, L. A. Doronina, and V. L. Ugolkov

Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, nab. Admirala Makarova 2, St. Petersburg,
199034 Russia

*e-mail: tyurninanz@mail.ru

Received September 9, 2008

Abstract—The glass formation region in the SrO–B₂O₃–SiO₂ system has been refined. The order of formation
of crystalline phases in the system has been investigated at SrO contents of 50–75 mol %. It has been demon-
strated that, at low temperatures, the 2SrO SiO₂ and 3SrO B₂O₃ phases crystallize first irrespective of the
composition. The congruent melting temperature of the 3SrO B₂O₃ SiO₂ compound is determined to be 1180
10C. The triangulation previously performed for the SrO–B₂O₃–SiO₂ system in the concentration range 50–
75 mol % SrO has been confirmed.

Key words: glass formation region, SrO–B₂O₃–SiO₂, phase equilibria, borates, silicates

DOI: 10.1134/S1087659610030041

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