Biomedical Engineering Reference
In-Depth Information
apatite might be found elsewhere [242]. Bulk bioceramics made of
nanocrystalline HA with a grain size of no more than 50 nm and a
near-theoretical density might be prepared by application of a high
(~3.5 GPa) pressure in uniaxial compaction of nanodimensional
powders with subsequent sintering at 640°C [142]. A similar
approach was reported by another research group [351].
Figure 3.5
A variety of nano-scale calcium orthophosphates with different
structures and morphologies synthesized by: (A and B) sol-gel
processing, (C) co-precipitation, (D) emulsion technique, (E)
hydrothermal process, (F) ultrasonic technique, (G) mechano-
chemical method, (H-L) template method, (M) microwave
processing, (N) emulsion-hydrothermal combination, (O)
microwave-hydrothermal combination. Reprinted from Ref.
[387] with permission.
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