Szczegóły publikacji
Opis bibliograficzny
Effect of nickel addition on the physicochemical properties of $SrTiO_{3}$-based materials / Agnieszka ŁĄCZ, Radosław LACH, Ewa DROŻDŻ // Ceramics International ; ISSN 0272-8842. — Tytuł poprz.: Ceramurgia International ; ISSN: 0390-5519. — 2022 — vol. 48 iss. 17, s. 24906–24914. — Bibliogr. s. 24913–24914, Abstr. — Publikacja dostępna online od: 2022-05-15
Autorzy (3)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 141803 |
|---|---|
| Data dodania do BaDAP | 2022-09-19 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.ceramint.2022.05.144 |
| Rok publikacji | 2022 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Ceramics International |
Abstract
Synthesis of materials in Ni/SrTiO3 system was undertaken. Perovskite structure material with nominal composition SrTi0.98O3 was synthesised by the sol-gel method. Nickel was introduced into the system by the wet impregnation method followed by proper thermal treatment. Two research paths were carried out: the evaluation of sintering conditions on material properties (sintering temperature: 1100, 1200, 1300 and 1400 °C; sintering time: 1, 3 and 5 h for sintering at 1300 °C) and the effect of nickel addition on the material properties - 1, 2, and 5 mol% of Ni compared to the amount of Ti was introduced into the analysed system. The microstructures of the materials, together with their structural (XRD analysis) and electrical (total conductivity and Seebeck coefficient) properties, were determined. Furthermore, temperature-programmed reduction (TPR) and temperature-programmed oxidation (TPOx) measurements were performed to evaluate the materials’ redox properties. It was shown that less than 1 mol% of Ni could be incorporated into the strontium titanate structure when a wet impregnation was chosen as the method for the introduction of Ni into the SrTiO3-based system. NiO and, for the highest amount of introduced nickel, also NiTiO3 were the main additional nickel-containing phases. For all materials synthesised in the Ni/SrTiO3 system, the positive value of the Seebeck coefficient was observed, suggesting that nickel is an acceptor-type dopant while incorporated into the perovskite structure. However, the TPR measurements clearly imply that nickel can be incorporated into the strontium titanate structure in various oxidation states.
