TY - JOUR A1 - Scherb, Tobias A1 - Kimber, S. A. J. A1 - Stephan, Christiane A1 - Henry, P. F. A1 - Schumacher, G. A1 - Escolástico, S. A1 - Serra, J. M. A1 - Seeger, J. A1 - Just, J. A1 - Hill, A.H. A1 - Banhart, J. T1 - Nanoscale order in the frustrated mixed conductor La5.6WO12-Delta N2 - This article reports a comprehensive investigation of the average and local structure of La5.6WO12-δ, which has excellent mixed proton, electron and oxide ion conduction suitable for device applications. Synchrotron X-ray and neutron powder diffraction show that a cubic fluorite supercell describes the average structure, with highly disordered lanthanum and oxide positions. On average, the tungsten sites are sixfold coordinated and a trace [3.7 (1.3)%] of anti-site disorder is detected. In addition to sharp Bragg reflections, strong diffuse neutron scattering is observed, which hints at short-range order. Plausible local configurations are considered and it is shown that the defect chemistry implies a simple 'chemical exchange' interaction that favours ordered WO6 octahedra. The local model is confirmed by synchrotron X-ray pair distribution function analysis and EXAFS experiments performed at the La K and W L-3 edges. It is shown that ordered domains of similar to 3.5 nm are found, implying that mixed conduction in La5.6WO12-δ is associated with a defective glassy-like anion sublattice. The origins of this ground state are proposed to lie in the nonbipartite nature of the face-centred cubic lattice and the pairwise interactions which link the orientation of neighbouring octahedral WO6 sites. This 'function through frustration' could provide a means of designing new mixed conductors. KW - neutron diffraction KW - x-ray diffraction KW - proton conductors PY - 2016 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-366756 DO - https://doi.org/10.1107/S1600576716006415 SN - 1600-5767 VL - 49 IS - Issue 3 SP - 997 EP - 1008 PB - International Union of Crystallography CY - Chester, UK AN - OPUS4-36675 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Matthies, Klaus A1 - Erhard, Anton A1 - Ernst, h. A1 - Hübschen, G. A1 - Just, Tilman A1 - Völz, Uwe A1 - Wessels, J. A1 - Boehm, Rainer A1 - Gebhardt, W. A1 - Mrasek, Heinz A1 - Neumann, Eberhard A1 - Redmer, Bernhard A1 - Schmitz, V. A1 - Thomas, Hans-Martin A1 - Walte, F. T1 - Ultraschallprüfung von austenitischen Werkstoffen PY - 2009 SN - 978-3-87155-988-4 IS - 1. Aufl. SP - 1 EP - 464 PB - DVS-Verl. CY - Berlin AN - OPUS4-19897 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Just, Ulrich A1 - Jones, D.J. A1 - Krüger, Rita A1 - Davidson, G. A1 - Käppler, K. T1 - SFC/FTIR, SFC/APCI-MS and MALDI-TOF-MS for the analysis of siloxane-ethylene oxide copolymers N2 - Polydimethylsiloxanes (PDMSs) modified by introducing ethylene oxide units with the aim of forming sufficiently water-soluble siloxane compounds were characterized using supercritical fluid chromatography (SFC) coupled with Fourier transform infrared (FTIR) spectroscopy and atmospheric pressure chemical ionization mass spectrometry (APCI–MS), and matrix-assisted laser desorption–ionization time-of-flight mass spectrometry (MALDI–TOF-MS). SFC has a domain in analyzing oligomers. Hyphenated techniques enable elucidation of the components. Remarkable is the resolution and short analysis time of MALDI–TOF-MS. SFC also allows quantification of the basic and reaction products. PY - 2000 DO - https://doi.org/10.1016/S0165-022X(00)00077-4 SN - 0165-022x IS - 43 SP - 209 EP - 221 PB - Elsevier CY - Amsterdam AN - OPUS4-11336 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Gaal, Mate A1 - Bertovic, Marija A1 - Müller, Christina A1 - Zickler, S. A1 - Fahlbruch, B. A1 - Spokoiny, V. A1 - Schombach, D. A1 - Just, Tilman A1 - Cramer, H.-J. T1 - Untersuchungen zum Einfluss menschlicher Faktoren auf das Ergebnis von zerstörungsfreien Prüfungen, Möglichkeiten zur Minimierung dieses Einflusses und Bewertung der Prüfergebnisse KW - Menschliche Faktoren KW - ZfP KW - Manuelle Ultraschallprüfung KW - WkP KW - KKW PY - 2009 IS - BfS-Projekt SR 2514 / Endbericht SP - 1 EP - 79 CY - Salzgitter AN - OPUS4-26081 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -