Abstract
powders were synthesized by a solid-state reaction method using as a chlorine source. effectively contributed to both the solid-state reaction and luminescent properties, acting as a flux and a chlorine source simultaneously. With a small amount of , the β-tricalcium phosphate (β-TCP) phase coexisted with Ca-chlorapatites (CCAp), and then it decreased and finally disappeared with increasing , resulting in a CCAp single phase. Photoluminescence (PL) spectra of CCAp exhibited a single blue emission at 460 nm under the excitation of 370 nm. PL intensity was correlated with the phase ratio of β-TCP/CCAp. Excess Cl evaporation at the high firing temperatures above dominantly caused the abrupt decrease in PL intensity.
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