Review Article

Insight into Biological Apatite: Physiochemical Properties and Preparation Approaches

Figure 5

SEM images of synthetic HAp crystals ((a) HAp raw powder; (b)–(f) HAp-sintered at 600, 700, 800, 900, and 1000°C, resp.): HAp crystals became larger and aggregated when temperature >800°C.
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(a)
929748.fig.005b
(b)
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(c)
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(d)
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(e)
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(f)