Mixed conducting perovskites and their solid state chemistry

The presented work comprises six original research articles on the solid state chemistry of selected cubic perovskite-type oxides. Cobalt containing mixed conducting perovskite-type materials like (Ba0.5Sr0.5)(Co0.8Fe0.2)O3 (BSCF) show exceptionally high oxygen fluxes. But serious long-term stability problems in the intermediate temperature (IT) range of 500-800 °C and a high coefficient of thermal expansion due to the flexible redox behavior of cobalt are reported. Thus, a great effort is put into the development of cobalt-free perovskite-type oxides. This book presents results concerning two novel promising cobalt-free perovskite materials containing iron, zinc or aluminum with the stoichiometries (Ba0.5Sr0.5)(Fe0.8Zn0.2)O3 (BSFZ) and (Ba0.5Sr0.5)(Fe1-xAlx)O3 (BSFA). For an accurate atomic level understanding of the solid state chemistry integrative investigations, like oxygen permeation or X-ray diffraction, were combined throughout the whole book with microscopic studies derived from analytical electron microscopy.

Autorentext

Julia Martynczuk was born in Hanover, Germany. She finished herPhD in natural science in 2009 at the Institute of PhysicalChemistry and Electrochemistry of the Leibniz UniversitätHannover. Since February 2009 she is a postdoctoral researcher atthe Department of Materials of the ETH Zürich.