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Ceramic materials based on titania and zirconia hold much promise in modern nuclear energy applications. Such materials due to their chemical and mineralogical similarity to nature-derived minerals may be used as matrices for radioactive waste immobilization as well as inert matrix fuels in the ‘burn and bury’ fuel cycle. However, sintering of such ceramics into a dense body is still a challenging issue. This paper addresses phase formation processes and sintering patterns of ceramics in TiO2 – Al2O3 – ZrO2 – MgO ...