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| Journal Article | PUBDB-2023-05970 |
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2023
Elsevier
New York, NY [u.a.]
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Please use a persistent id in citations: doi:10.1016/j.jpcs.2023.111437 doi:10.3204/PUBDB-2023-05970
Abstract: hase stability and thermal expansion of rock-salt Me$_{1-x}$Zn$_x$O (Me = Ni$^{2+}$, Co$^{2+}$, Fe$^{2+}$, Mn$^{2+}$) solid solutions synthesized at high pressures and high temperatures have been studied by synchrotron X-ray diffraction in a wide (0.1 ≤ x ≤ 0.8) concentration range. At ambient pressure rs-Me$_{1-x}$Zn$_x$O solid solutions were found kinetically stable up to 670–1100 K depending on the composition and type of Me$^{2+}$ cation. Temperature-induced decomposition of the single-phase rock-salt solid solutions lead in most cases to the formation of a mixture of two solid solutions, with cubic and wurtzite structures. Oxidation of the Me$^{2+}$ cation (Co, Mn) by atmospheric oxygen can result in formation of mixed higher oxides of these metals. In all the systems studied, the rock-salt solid solutions show a linear temperature dependence of the thermal expansion, but for the compositions with the highest ZnO content, deviations from the linear dependence are observed.
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