Using specified telluride glasses to prepare the glass-ceramics containing narrow band-gap telluride crystals as the main precipitated phase would be an effective route to developing high-efficiency thermoelectric materials. Unfortunately, such telluride glasses are extremely difficult to achieve. In this paper, a strategy is proposed to vitrify these narrow band-gap tellurides by jointly focusing on the glass formation thermodynamic and kinetic factors. Novel Ga2Te3-SnTe glasses are successfully synthesized and the glass-forming region is found to be located at the SnTe-rich compositions. (C) 2017 Elsevier B.V. All rights reserved.