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Alkaline Earth Metals
Research from Dalhousie University Provide New Insights into Alkaline Earth Metals
June 9th, 2011
"Agar was used for gel casting barium titanate (BaTiO3) ceramics. Aqueous suspensions of bimodal BaTiO3 powders, with 500 and 100 nm nominal particle sizes, were prepared with a 85:15 coarse:fine ratio," scientists in Halifax, Canada report.
"BaTiO3 suspensions were mixed with agar solutions from 2 to 8 wt%, with 0.5 or 1.0 wt% agar (as a function of BaTiO3 solids content) in the final gel-casting suspension. BaTiO3 green densities up to similar to 53.2% of theoretical were obtained. Gel casting of high aspect ratio features (up to 7:1) could be routinely performed," wrote C.D. Munro and colleagues, Dalhousie University.
The researchers concluded: "Cast...
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Source: Computer Weekly News (2011-06-09)