TY - JOUR A1 - Dreßler, Martin A1 - Nofz, Marianne A1 - Klobes, Peter A1 - Dörfel, Ilona A1 - Reinsch, Stefan T1 - Differences between films and monoliths of sol-gel derived aluminas JF - Thin solid films N2 - This work compares thin layers (films) and monoliths prepared from alumina sols with respect to their microstructure, thermal evolution, porosity and specific surface area. After heat treatment at similar temperatures, films and monoliths showed the same qualitative changes in porosity and specific surface area. However, some marked quantitative differences were detected. Film fragments had a lower open porosity, a lower specific surface area and a narrower pore size distribution. Furthermore, the thermal evolution showed a markedly different burnout of organic components between films and monoliths. The observed differences between films and monolith can be explained by the ageing history of the sols during sample preparation. KW - Sol-gel processing KW - Alumina KW - Phase transitions KW - Porosity PY - 2010 DO - https://doi.org/10.1016/j.tsf.2010.07.057 SN - 0040-6090 VL - 519 IS - 1 SP - 42 EP - 51 PB - Elsevier CY - Amsterdam AN - OPUS4-22606 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -