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Fabrication of a Porous Bioactive Glass–Ceramic Using Room‐Temperature Freeze Casting
Author(s) -
Song JuHa,
Koh YoungHag,
Kim HyounEe,
Li LongHao,
Bahn HyoJin
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.1551-2916.2006.01092.x
Subject(s) - materials science , green body , porosity , composite material , ceramic , sublimation (psychology) , sintering , simulated body fluid , camphene , porous glass , bioactive glass , slurry , fabrication , casting , apatite , tape casting , mineralogy , scanning electron microscope , chemistry , chromatography , psychology , medicine , alternative medicine , pathology , essential oil , psychotherapist
The room‐temperature freeze‐casting method was used to fabricate porous bioactive glass–ceramics. In this method, a glass/camphene slurry prepared at 60°C was cast into a mold at 20°C, resulting in the production of a rigid green body that was comprised of three‐dimensional dendritic camphene networks surrounded by highly concentrated glass powder walls. After the sublimation of camphene, the samples were sintered for 3 h at elevated temperatures ranging from 700° to 1100°C. As the sintering temperature was increased to 1000°C, the densification of the glass–ceramic wall was remarkably enhanced, while its highly porous structure was preserved. The sample sintered at 1000°C showed a high porosity of 53% and pore channels with a size of several tens of micrometers, as well as dense glass–ceramic walls. In addition, the fabricated samples effectively induced the deposition of apatite on their surfaces when immersed in simulated body fluid, implying that they are very bioactive.