Synthesis, structure, microstructure, and thermoelectric properties of perovskite-type manganate phases [Elektronische Ressource] / vorgelegt von Laura Bocher

Synthesis, structure, microstructure,and thermoelectric properties ofperovskite-type manganate phasesDissertationzur Erlangung des Doktorgradesder mathematisch-naturwissenschaftlichen Fakult atder Universit at Augsburgvorgelegt vonLaura BocherAugsburg, January 2009Solid State Chemistry and Catalysis,Empa, CH-8600 Dub endorfBocher, Laura:Synthesis, structure, microstructure, and thermoelectric properties ofperovskite-type manganate phasesErstgutachter: Prof. Dr. Armin RellerZweitgutachter: Prof. Dr. Anke Weidenka Prof. Dr. Jochen MannhartTag der mundlic hen Prufun g: 18.05.2009Dedicated to my parents and my brotherNothing in life is to be feared. It is only to be understoodMarie Sk lodowska CurieAbstractPolycrystalline perovskite-type manganate phases, i.e. CaMn Nb O (x = 0.02,1 x x 30.05, 0.08, and 0.10) and LaMn Co O (x = 0.05, 0.10, 0.90, and 0.95) phases1 x x 3were studied regarding their thermoelectric properties for high-temperature applica-tions. Di erent synthesis methods were successfully applied, i.e. the conventionalsolid state reaction (SSR) method and the "chimie douce" synthesis routes, result-ing in highly-crystalline tailor-made perovskite particles with a diversity of particlesizes, morphologies, and microstructures. Perovskite-type manganates were investi-gated concerning their morphology, crystal structure, microstructure, thermal stabil-ity, and low-temperature magnetic properties.