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Effect of Sucrose on Fabrication of Ceramic Foams from Aqueous Slurries
Author(s) -
Pradhan Mamata,
Bhargava Parag
Publication year - 2005
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.1551-2916.2004.00001.x
Subject(s) - materials science , ammonium bromide , ceramic , suspension (topology) , slurry , porosity , composite material , coalescence (physics) , foaming agent , aqueous solution , viscosity , fabrication , chemical engineering , aqueous suspension , pulmonary surfactant , chemistry , alternative medicine , pathology , homotopy , astrobiology , pure mathematics , engineering , medicine , physics , mathematics
Ceramic foams with porosity exceeding 90% were prepared by direct foaming and casting of aqueous suspensions containing cetyl trimethyl ammonium bromide (CTAB) as a foaming agent. Foaming of the suspensions, particularly with lower viscosity, was initially non‐homogeneous but the foam appeared to homogenize with milling time. Addition of sucrose to ceramic suspensions resulted in lowering of the suspension viscosity, stabilized the foams by reducing drainage of the suspension, and minimized coalescence of bubbles leading to lower cell sizes in sintered foams. Ceramic foams prepared from sucrose based suspensions were strengthened to such an extent that foams with porosity above 90% could be machined in the green state.