Abstract
The glass formation is investigated in the ternary and quaternary systems ZrF4-PbF2-LaF3, ZrF4-PbF2-BaF2, ZrF4-PbF2-LaF3-NaF, and ZrF4-PbF2-BaF2-NaF at a content of zirconium fluoride ZrF4 in the range 55–70 mol %. In the ternary systems, it has proved to be possible to synthesize only glass-ceramic samples. In the ZrF4-PbF2-LaF3-NaF quaternary system, the glass formation regions are located within the corresponding concentration triangles. In the ZrF4-PbF2-BaF2-NaF quaternary system, the glass formation regions are adjacent to the ZrF4-BaF2-NaF ternary system containing 60 mol % ZrF4. Glasses in the ZrF4-PbF2-LaF3-NaF system are more stable to crystallization than glasses in the ZrF4-PbF2-BaF2-NaF system. The influence of the purity of the initial fluorides on the process of glass formation in the systems under investigation is analyzed.
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