Szczegóły publikacji
Opis bibliograficzny
Formation of solid solutions and physicochemical properties of the high-entropy $Ln_{1−x}Sr_{x}(Co,Cr,Fe,Mn,Ni)O_{3−\delta} (Ln = La,Pr, Nd, Sm or Gd)$ perovskites / Juliusz DĄBROWA, Klaudia Zielińska, Anna STĘPIEŃ, Marek ZAJUSZ, Margarita Nowakowska, Maciej MOŹDZIERZ, Katarzyna BERENT, Maria Szymczak, Konrad ŚWIERCZEK // Materials [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 1996-1944. — 2021 — vol. 14 iss. 18 art. no. 5264, s. 1–16. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 14–16, Abstr. — Publikacja dostępna online od: 2021-09-13. — K. Świerczek - dod. afiliacja: AGH Centre of Energy
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Dane bibliometryczne
| ID BaDAP | 136455 |
|---|---|
| Data dodania do BaDAP | 2021-09-28 |
| Tekst źródłowy | URL |
| DOI | 10.3390/ma14185264 |
| Rok publikacji | 2021 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Materials |
Abstract
Phase composition, crystal structure, and selected physicochemical properties of the high entropy Ln(Co,Cr,Fe,Mn,Ni)O3−δ (Ln = La, Pr, Gd, Nd, Sm) perovskites, as well as the possibility of Sr doping in Ln1−xSrx(Co,Cr,Fe,Mn,Ni)O3−δ series, are reported is this work. With the use of the Pechini method, all undoped compositions are successfully synthesized. The samples exhibit distorted, orthorhombic or rhombohedral crystal structure, and a linear correlation is observed between the ionic radius of Ln and the value of the quasi-cubic perovskite lattice constant. The oxides show moderate thermal expansion, with a lack of visible contribution from the chemical expansion effect. Temperature-dependent values of the total electrical conductivity are reported, and the observed behavior appears distinctive from that of non-high entropy transition metal-based perovskites, beyond the expectations based on the rule-of-mixtures. In terms of formation of solid solutions in Sr-doped Ln1−xSrx(Co,Cr,Fe,Mn,Ni)O3−δ materials, the results indicate a strong influence of the Ln radius, and while for La-based series the Sr solubility limit is at the level of xmax = 0.3, for the smaller Pr it is equal to just 0.1. In the case of Nd-, Sm- and Gd-based materials, even for the xSr = 0.1, the formation of secondary phases is observed on the SEM + EDS images.
