HYDROTHERMAL SYNTHESIS OF DYSPROSIUM (III) ACTIVATED APATOTE PHOSPHOR FROM AMORPHOUS CALCIUM PHOSPHATE AND ITS THERMOLUMINESCENCE PROPERTY

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There have been very few reports about the Thermoluminescence (TL) phosphor whose host crystal is apatite compound. The present work was investigated about hydrothermal synthesis conditions of novel dysprosium (III) activated fluoroapatite (FAp:Dy³⁺) TL phosphor and its TL property. The optimum conditions for synthesis of FAp:Dy³⁺ TL phosphor were as follows: Dy/Ca atomic ratio, 0.02; hydrothermal temperature, 220°C; and time 3h. The luminance was so high that crystallinity is high.And, FAp:Dy³⁺ IL phosphor had theglow peak at 145°C,190°C and 250°C,the emission color was yellowish-white.