Szczegóły publikacji
Opis bibliograficzny
Effect of sintering temperature and Sr/Ti ratio on the nature of Mn-ion speciation within $SrTiO_{3}$-based compounds / Agnieszka ŁĄCZ, Paulina GWÓŹDŹ, Monika Mielniczuk, Joanna STĘPIEŃ, Ewa DROŻDŻ // Ionics ; ISSN 0947-7047. — 2025 — vol. 31 iss. 1, s. 1111–1123. — Bibliogr. s. 1122–1123, Abstr. — Publikacja dostępna online od: 2024-12-03
Autorzy (5)
- AGHŁącz Agnieszka
- AGHGwóźdź Paulina
- Mielniczuk Monika
- AGHStępień Joanna
- AGHDrożdż Ewa
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 158252 |
|---|---|
| Data dodania do BaDAP | 2025-03-24 |
| Tekst źródłowy | URL |
| DOI | 10.1007/s11581-024-05966-8 |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Ionics |
Abstract
Manganese-doped (Mn/Ti = 0.02/0.98) SrTiO3-based materials with various Sr/Ti mole ratios (1.02, 1.00, 0.97 and 0.92) were obtained by the citrate precursor method. The materials were characterised in terms of microstructure (SEM), structure (XRD, XANES), electrical properties (DC method) and reducibility (TPR). With the introduction of 2 mol.% Mn, the cubic structure of SrTiO3 is preserved, but significantly limits (from Sr/Ti ≥ 0.8 to Sr/Ti > 0.92) the possibilities of deviations from stoichiometry at 1200°C. The narrowing of the stability limit of the perovskite structure to Sr/Ti > 0.97 with an increase in temperature to 1400°C and segregation of Ti-Mn-enrich species are shown. The location and the oxidation states of Mn in both (Sr and Ti) sublattices depend on the assumed Sr/Ti ratio and sintering temperature. Regardless of the Sr/Ti ratio, Mn-doped SrTiO3 exhibits very low electrical conductivity with an ionic conductivity mechanism.