title: High temperature conductance mapping for correlation of electrical properties with micron-sized chemical and microstructural features.
abstract: High temperature AC conductance mapping is a scanning probe technique for resolving local electrical properties in microscopic areas. It is especially suited for detecting poorly conducting phases and for ionically conducting materials such as those used in solid oxide electrochemical cells. Secondary silicate phases formed at the edge of lanthanum strontium manganite microelectrodes are used as an example for correlation of chemical, microstructural and electrical properties with a spatial resolution of 1-2µm to demonstrate the technique. The measurements are performed in situ in a controlled atmosphere high temperature scanning probe microscope at 650°C in air.
authors.affiliation: Department of Energy Conversion and Storage, Technical University of Denmark, Frederiksborgvej 399, DK-4000 Roskilde, Denmark. Electronic address: karv@dtu.dk.
authors.forename: Karin Vels
authors.initials: KV
authors.lastname: Hansen
authors.affiliation: Department of Energy Conversion and Storage, Technical University of Denmark, Frederiksborgvej 399, DK-4000 Roskilde, Denmark.
authors.forename: Kion
authors.initials: K
authors.lastname: Norrman
authors.affiliation: Department of Chemistry, Technical University of Denmark, Kemitorvet Building 207, DK-2800 Lyngby, Denmark.
authors.forename: Torben
authors.initials: T
authors.lastname: Jacobsen
keywords: Conductance; High temperature scanning probe microscopy; In situ scanning probe microscopy; Microelectrodes; Secondary phases