Complex oxide molecules that contain five or more metal ions
This article relies excessively on references to primary sources. Please improve this article by adding secondary or tertiary sources. Find sources: "High entropy oxide" – news · newspapers · books · scholar · JSTOR(October 2020) (Learn how and when to remove this message)
Structure of high-entropy oxide (MgNiCoCuZn)0.2O with site occupancies shown. Oxygen atoms are shown in red.
High-entropy oxides (HEOs) are complex oxides that contain five or more principal metal cations 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.[1] HEOs have been successfully synthesized in many structures, including fluorites,[2] perovskites, and spinels.[3] HEOs are currently being investigated for applications as functional materials.[3][4][5]
^Rost, Christina M.; Sachet, Edward; Borman, Trent; Moballegh, Ali; Dickey, Elizabeth C.; Huo, Dong; Jones, Jacob L.; Curtarolo, Stefano; Maria, John-Paul (2015). "Entropy-stabilized oxides". Nature Communications. 6: 8485. Bibcode:2015NatCo...6.8485R. doi:10.1038/ncomms9485. PMC 4598836. PMID 26415623.
^Anandkumar, Mariappan; Bhattacharya, Saswata; Deshpande, Atul Suresh (2019-08-23). "Low temperature synthesis and characterization of single phase multi-component fluorite oxide nanoparticle sols". RSC Advances. 9 (46): 26825–26830. doi:10.1039/C9RA04636D. ISSN 2046-2069. PMC 9070433. PMID 35528557.
^ abZhang, Rui-Zhi; Reece, Michael J. (2019-10-08). "Review of high entropy ceramics: design, synthesis, structure and properties". Journal of Materials Chemistry A. 7 (39): 22148–22162. doi:10.1039/C9TA05698J. ISSN 2050-7496. S2CID 203944327.
^Musicó, Brianna L.; Gilbert, Dustin; Ward, Thomas Zac; Page, Katharine; George, Easo; Yan, Jiaqiang; Mandrus, David; Keppens, Veerle (2020-04-01). "The emergent field of high entropy oxides: Design, prospects, challenges, and opportunities for tailoring material properties". APL Materials. 8 (4): 040912. doi:10.1063/5.0003149. S2CID 218784086.
^Kotsonis, George N.; Almishal, Saeed S. I.; Marques dos Santos Vieira, Francisco; Crespi, Vincent H.; Dabo, Ismaila; Rost, Christina M.; Maria, Jon‐Paul (2023-06-24). "High‐entropy oxides: Harnessing crystalline disorder for emergent functionality". Journal of the American Ceramic Society. 106 (10): 5587–5611. doi:10.1111/jace.19252. hdl:10919/117566. ISSN 0002-7820.
and 23 Related for: High entropy oxide information
High-entropyoxides (HEOs) are complex oxides that contain five or more principal metal cations and have a single-phase crystal structure. The first HEO...
; Söderman, O. (2006). "Hydration of Dimethyldodecylamine-N-Oxide: Enthalpy and Entropy Driven Processes". J. Phys. Chem. B. 110 (27): 13649–13655. doi:10...
to BaO2 occurs at moderate temperatures but the increased entropy of the O2 molecule at high temperatures means that BaO2 decomposes to O2 and BaO at 1175K...
modern integrated circuits. Metal oxides are formed consistent with minimizing surface energy and minimizing system entropy. The formation reactions are chemical...
Aluminium oxide (or aluminium(III) oxide) is a chemical compound of aluminium and oxygen with the chemical formula Al2O3. It is the most commonly occurring...
enthalpy change and ΔS is the entropy change. The Ellingham diagram plots the Gibbs free energy change (ΔG) for each oxidation reaction as a function of temperature...
Calcium oxide (formula: CaO), commonly known as quicklime or burnt lime, is a widely used chemical compound. It is a white, caustic, alkaline, crystalline...
Magnesium oxide (MgO), or magnesia, is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium (see also oxide). It...
Nitric oxide (nitrogen oxide or nitrogen monoxide) is a colorless gas with the formula NO. It is one of the principal oxides of nitrogen. Nitric oxide is...
exceeds that of most metals. As an amorphous solid, beryllium oxide is white. Its high melting point leads to its use as a refractory material. It occurs...
Nitrous oxide (dinitrogen oxide or dinitrogen monoxide), commonly known as laughing gas, nitrous, nitro, or nos, is a chemical compound, an oxide of nitrogen...
Ethylene oxide is an organic compound with the formula C2H4O. It is a cyclic ether and the simplest epoxide: a three-membered ring consisting of one oxygen...
Zinc oxide is an inorganic compound with the formula ZnO. It is a white powder which is insoluble in water. ZnO is used as an additive in numerous materials...
Electronic entropy is the entropy of a system attributable to electrons' probabilistic occupation of states. This entropy can take a number of forms. The...
Sodium oxide is a chemical compound with the formula Na2O. It is used in ceramics and glasses. It is a white solid but the compound is rarely encountered...
natural process that converts a refined metal into a more chemically stable oxide. It is the gradual deterioration of materials (usually a metal) by chemical...
electrolyte material; the SOFC has a solid oxide or ceramic electrolyte. Advantages of this class of fuel cells include high combined heat and power efficiency...
the structure of ice II is hydrogen-ordered, which helps to explain the entropy change of 3.22 J/mol when the crystal structure changes to that of ice...
Institute (Switzerland). Examples of reactions satisfying highentropy changes are metal oxide dissociations, as the products have more excitation levels...
amount of manganese(III) oxide. Production of batteries and ferrite (two of the primary uses of manganese dioxide) requires high purity manganese dioxide...
Uranium dioxide or uranium(IV) oxide (UO2), also known as urania or uranous oxide, is an oxide of uranium, and is a black, radioactive, crystalline powder...
entropy of reaction: two solids, the metal oxide (and flux) and carbon, are converted to a new solid (metal) and a gas (COx), the latter having high entropy...
Global Information
