High-entropy oxides (HEOs) are complex oxides that contain five or more different metal cations in the same amount and have a single-phase crystal structure. The first HEO, (MgNiCuCoZn)0.2O in a rock salt structure, was reported in 2015 by Rost et al. HEOs have been successfully synthesized in many structures, including perovskites and spinels.
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| - Hochentropie-Oxide (de)
- High entropy oxide (en)
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| - Als Hochentropie-Oxide (HEO) bezeichnet man komplexe Oxide, die fünf oder mehr verschiedene Metallkationen in gleicher Menge enthalten und eine einphasige Kristallstruktur aufweisen. Je nach Zusammensetzung unterscheidet man Übergangsmetall-HEO (TM-HEO), Seltenerd-HEO (RE-HEO) und gemischte HEO (TM-RE-HEO). Die erste Veröffentlichung über HEOs erfolgte durch die Gruppe von Christina M. Rost et al. an der North Carolina State University im Jahr 2015. (de)
- High-entropy oxides (HEOs) are complex oxides that contain five or more different metal cations in the same amount and have a single-phase crystal structure. The first HEO, (MgNiCuCoZn)0.2O in a rock salt structure, was reported in 2015 by Rost et al. HEOs have been successfully synthesized in many structures, including perovskites and spinels. (en)
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| - Als Hochentropie-Oxide (HEO) bezeichnet man komplexe Oxide, die fünf oder mehr verschiedene Metallkationen in gleicher Menge enthalten und eine einphasige Kristallstruktur aufweisen. Je nach Zusammensetzung unterscheidet man Übergangsmetall-HEO (TM-HEO), Seltenerd-HEO (RE-HEO) und gemischte HEO (TM-RE-HEO). Die erste Veröffentlichung über HEOs erfolgte durch die Gruppe von Christina M. Rost et al. an der North Carolina State University im Jahr 2015. (de)
- High-entropy oxides (HEOs) are complex oxides that contain five or more different metal cations in the same amount and have a single-phase crystal structure. The first HEO, (MgNiCuCoZn)0.2O in a rock salt structure, was reported in 2015 by Rost et al. HEOs have been successfully synthesized in many structures, including perovskites and spinels. The rock salt structure of (MgNiCuCoZn)0.2O is notable because two of the parent compounds are not stable in the rock salt structure at ambient pressure and room temperature. CuO has a monoclinic structure, and ZnO is usually stable in the wurtzite structure. The possibility of stabilizing all these binary compounds into a single rock salt phase is a direct effect of the value of the configurational entropy, exceptionally large in case of a multicomponent (generally up to 5 components) mixture, which compensates for the unfavorable correspondent enthalpic contribution. (en)
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