Abstract
ABSTRACTCathodo- and thermoluminescence emission of calcium phosphates, synthetized by chemical precipitation and characterized by X-ray diffraction, environmental scanning electronic microscopy and energy dispersive spectroscopy have been studied. Thermal treatment at 1100°C increases the crystallinity, a phase transition (hydroxylapatite + β-tricalcium phosphate → β-tricalcium phosphate) and an enhancement of the luminescence emission. Cathodoluminescence and thermoluminescence display a very complex spectra in the UV–IR range where the wavebands would be associated with the presence of (i) hydroxyl groups, (ii) nonbridging oxygen hole centers, (iii) excited oxygens, (iv) peroxy groups, and (v) residual iron ions in the lattice.
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