Mallick, Kajal K. (2009) Freeze casting of porous bioactive glass and bioceramics. In: The 10th International Conference on Ceramic Processing Science (ICCPS- 10), Inuyama, Aichi, Japan, May 25–28, 2008. Published in: Journal of the American Ceramic Society, Vol.92 (No.1 Suppl. 1). S85-S94.

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Abstract

Highly porous network structures of hydroxyapatite, tricalcium phosphates, a bioactive glass as well as their composites have been fabricated using variations of camphene-, glycerol-, and ice-based freeze-casting techniques. The ball-milled slurries containing 10%-60% solid loading were cast at ambient temperature, followed by sublimation at temperatures between -70 degrees and 60 degrees C. The green body was sintered in air to a maximum temperature of 1100 degrees C for 4 h, which produced excellent three-dimensionally (3-D) interconnected structures with open pores. The nature of the pore channels varied from dendritic, columnar, and cellular to mixed geometry, with dense outer shells in some cases, depending on the particular method used. A monotonic increase in porosity with loading was observed with a decrease in the loading volume. Microstructural analysis was used for porous structures to extract information on geometry, porosity, and pore size distribution. This proved particularly useful to assess whether some of the 3-D structures produced by these methods are suitable for tissue engineering applications. Differential thermal analysis-thermogravimetry, scanning electron microscopy, X-ray diffraction, and density were used to characterize precursor powders, slurry, and sintered products.

Item Type:	Conference Item (Paper)
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology
Divisions:	Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Journal or Publication Title:	Journal of the American Ceramic Society
Publisher:	Wiley-Blackwell Publishing Ltd.
ISSN:	0002-7820
Date:	January 2009
Volume:	Vol.92
Number:	No.1 Suppl. 1
Number of Pages:	10
Page Range:	S85-S94
Identification Number:	10.1111/j.1551-2916.2008.02784.x
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Open Access
Conference Paper Type:	Paper
Title of Event:	The 10th International Conference on Ceramic Processing Science (ICCPS- 10)
Type of Event:	Conference
Location of Event:	Inuyama, Aichi, Japan
Date(s) of Event:	May 25–28, 2008
URI:	http://wrap.warwick.ac.uk/id/eprint/28708

Data sourced from Thomson Reuters' Web of Knowledge

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