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Processing of Cellular Glass Ceramics
Author(s) -
Rambo Carlos Renato,
De Sousa Eliandra,
De Oliveira Antônio Pedro Novaes,
Hotza Dachamir,
Greil Peter
Publication year - 2006
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2006.01247.x
Subject(s) - materials science , microstructure , ceramic , composite material , sodium silicate , scanning electron microscope , suspension (topology) , polyurethane , glass ceramic , bentonite , rheology , compressive strength , chemical engineering , mathematics , homotopy , pure mathematics , engineering
Commercial polyurethane foams with a monomodal pore size distribution were chosen to produce LZSA (Li 2 O–ZrO 2 –SiO 2 –Al 2 O 3 system) glass–ceramic foams by the polymeric sponge method. A suspension containing LZSA glass–ceramic, bentonite, and sodium silicate was prepared in water and isopropanol to impregnate the polymeric foams by dip coating. The suspension was characterized by rheological measurements. The effect of the solvent on the microstructure and physical properties on the LZSA foams was evaluated. The cellular microstructure of the glass–ceramic foams was characterized by scanning electron microscopy (SEM) and micro‐computer X‐ray tomography (μ‐CT). LZSA foams prepared with isopropanol suspension exhibited higher mechanical strength under compression than those prepared with water.