Thermal Properties of Glass and Melts of the CaO–B₂O₃–Al₂O₃–CuO System

E. N. Selivanov^a^, *, A. S. Vusikhis^a, S. V. Sergeeva^a, R. I. Gulyaeva^a, and V. V. Ryabov^a

^a Institute of Metallurgy, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620016 Russia

Correspondence to: *e-mail: lazarevasv@mail.ru

Received 15 July, 2020

Abstract—The temperatures of devitrification of cold crystallization, melting, and glass transition of samples of the CaO–B₂O₃–Al₂O₃–CuO system are determined by the methods of differential thermal analysis. The viscosity of alumina–calcium borate melts containing up to 8.1% of CuO is measured in the temperature range of 880 to 1300°C. It is shown that the addition of copper oxide reduces the viscosity and activation energy of the viscous flow.

Keywords: oxide melt, borates, viscosity, thermal properties, crystallization, glass transition, copper oxide

DOI: 10.1134/S1087659621020115

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