Abstract
Phase equilibria in the CuInSe2-Ge-Se ternary system were studied by methods of differential thermal analysis (DTA), X-ray phase (XRD), microstructural (MSA) analyzes and measurement of microhardness. Results of these studies were summarized and presented in the paper. Phase diagrams of CuInSe2-Ge, CuInSe2-GeSe, CuInGeSe4 – Ge, CuInGeSe4 – GeSe, CuInGeSe4 -Se and liquidus surface projections of quasi-ternary system established and monovariant curves, regions of phase delamination in the liquid state, coordinates of monotectic, metathetic, peritectic and eutectic processes determined. Also, a region of primary crystallization of a low-temperature polymorphic form (phase with a chalcopyrite structure) of the CuInSe2 compound in the presence of germanium chalcogenides specified.