Conclusions
It was confirmed that the compound ZrTiO4 and two types of solid solutions are formed in the system ZrO2-TiO2. The beginning of the interaction between ZrO2 and TiO2 is noticed at 1200° after 30 hours.
The solid solution of the distorted fluorite type is marked by a reduction in the monoclinic zirconium dioxide lattice parameters. The formation of a solution does not hamper the polymorphous transitions of the zirconium dioxide. The solid solution of the rutile type in the TiO2 region is marked by an increase in the parameters of the titanium dioxide elementary cells. No polymorphous transitions of the ZrO2 were noticed in these solid solutions.
The addition of titanium dioxide shifts the polymorphous transition from 1050° in the case of pure zirconium dioxide to 600° in the specimen with an addition of 40–50 mole% TiO2.
The solid solutions of the rutile series as well as the compound ZrTiO4 show equal thermal expansion, and despite the high porosity which they maintain up to 1700° may be put to practical use.
The solid solutions of the zirconium series, containing up to 15% TiO2, show sharp volumetric changes during the polymorphous transition and cannot be used for producing parts on account of this.
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Keler, E.K., Andreyeva, A.B. Further data on solid solutions in ZrO2-TiO2 system. Refractories 1, 257–260 (1960). https://doi.org/10.1007/BF01291938
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DOI: https://doi.org/10.1007/BF01291938