A magnetic glass−ceramic suitable to be used as biomaterial has been synthesized. After the NaO−Fe 2 O 3 −CaO−SiO 2 starting glass is annealed, a glass−ceramic based on ferroan wollastonite-like and ε-(Fe,Ca)SiO 3 -like phases is obtained. Both phases contain Fe 2+ ions, leading to two magnetic phases with different coercive forces. Because of the magnetic properties, this material could be used as a thermoseed for cancer treatment by hyperthermia. This glass−ceramic is coated by an amorphous layer when it is soaked in simulated body fluid (SBF). This new layer, formed with the incorporation of phosphorus over the surface, would lead to a good integration with the bone tissue after being implanted.
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Real et al. (2001) studied this question.
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