Thermal stability of perovskite phase in heavily Mn-doped SrTiO3 nanoparticles in oxidizing and reducing atmospheres. (15th April 2016)

• Record Type: Journal Article
• Authors: Makarova, Marina V.; Artemenko, Anna; Kopecek, Jaromir; Laufek, Frantisek; Zemenova, Petra; Trepakov, Vladimir A.; Dejneka, Alexandr
• Is Part Of: Scripta materialia. Volume 116(2016)
• Page Start: 21
• Page End: 25
• Publication Date: 2016-04-15
• Subjects: Surface segregation -- Perovskite -- Nanocrystalline microstructure -- Thermally activated processes -- Metastable phases; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.01.029
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Complex investigations of the thermal stability as well as Mn-dopant distribution depending on chemical composition and processing condition have been performed in heavily doped SrTi1-x Mnx O3 nanoparticles with x = 0.2 and 0.4. Prepared nanopowders reveal stable enough cubic perovskite structure even after treatment in oxidizing atmosphere up to 1000 °C. At the same time treatment in reducing atmosphere leads to decrease of the Mn solubility limit. Mn distribution evidences a weak tendency of Mn ions to migrate to surface. This migration increases in air and decreases at treatment in oxygen atmosphere. Graphical abstract: