TY - JOUR A1 - Mehner, Hartmut A1 - Pitsch, I. A1 - Geßner, W. A1 - Brückner, A. A1 - Möhmel, St. A1 - Uecker, D.-Ch. A1 - Pohl, M.-M. T1 - Synthesis and characterization of Fe2O3 containing aluminas by thermal decomposition of modified ammonium dawsonite N2 - Aluminas with Fe2O3 particles finely divided in the Al2O3 matrix were prepared via a crystalline precursor derived from ammonium dawsonite and its calcination. The precursors with Fe content between 1 and 10 wt% were synthesized by reaction of ammonium hydrogen carbonate with mixtures containing aluminium ammonium sulfate and ferric ammonium sulfate. The characterization of the as-synthesized and calcined products by chemical analysis, XRD, EPR, Mössbauer, TEM and adsorption measurements shows that all the Fe3+ ions are incorporated into the structure of dawsonite when the Fe content is low and that the calcined materials with micropores and mesopores (maximum 30–40 Å) also contain very small Fe2O3 particles (<10 nm) at higher Fe contents. PY - 2001 DO - https://doi.org/10.1039/b101466h SN - 0959-9428 SN - 1364-5501 IS - 11 SP - 2498 EP - 2503 PB - Royal Society of Chemistry CY - Cambridge AN - OPUS4-1206 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Brückner, W. A1 - Helms, Rolf A1 - Papailiou, K. O. T1 - Zur Berechnung der Lebensdauer von Freileitungsseilen aufgrund von Schwingungsmessungen und Ermüdungsversuchen PY - 1985 SN - 0013-5496 VL - 84 IS - 1 SP - 24 EP - 30 PB - VWEW-Energieverl. CY - Frankfurt, M. AN - OPUS4-33909 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -