Microstructure and properties of LZSA glass-ceramic foams

Beitrag in einer Fachzeitschrift

Details zur Publikation

Autorinnen und Autoren: Fey T
Zeitschrift: Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
Verlag: Elsevier
Jahr der Veröffentlichung: 2008
Band: 476
Seitenbereich: 89-97
ISSN: 0921-5093
Sprache: Englisch


Commercial polyurethane foams with a monomodal pore size distribution were used to produce LZSA glass-ceramic foams by the polymeric sponge method. A suspension containing LZSA glass powder, bentonite and sodium silicate was prepared in isopropanol to impregnate the polymeric foams by dip coating. The sintering conditions were varied in the range of 700-850 degrees C for 30-180 min. The cellular microstructure of glass-ceramic foams was characterized by scanning electron microscopy (SEM) and micro-computer X-ray tomography (mu CT). Optimum physical, mechanical and fluidynamic properties of the LZSA glass-ceramic foams were obtained at 750 degrees C for 60 min. Main crystalline phases detected were beta-spodumene and zirconium silicate. The compressive strength of the foams (0.1-10MPa) is strongly dependent on their overall porosity and their behaviour could be explained using the Gibson-Ashby model. The Darcyan permeability of LZSA foams was found to be in the range of 0.1-4 x 10(-9) m(2), which is in the order of magnitude of cellular supports for aerosol filters, and, therefore, suitable for several other technological applications. (C) 2007 Elsevier B.V. All rights reserved.

FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Fey, Tobias Dr.
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)

Zuletzt aktualisiert 2019-15-05 um 15:23