BaHfO3:Ce sintered ceramic scintillators |
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Authors: | Aleksandra Grezer Eugeniusz Zych Leszek K?piński |
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Institution: | 1. Faculty of Chemistry, University of Wroclaw, 14 F. Joliot-Curie Street, 50-383 Wroclaw, Poland;2. Institute of Low Temperature and Structure Research, PAS, 2 Okolna Street, 50-422 Wroclaw, Poland |
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Abstract: | Raw powders of BaHfO3:Ce were prepared with modified Pechini process and were calcined in the 650–1700 °C range of temperatures, at different atmospheres – air, vacuum and nitrogen–hydrogen mixture. The powders were converted into sintered ceramics by vacuum sintering. The materials were characterized by XRD, TEM, photoluminescence and radioluminescence spectroscopy. UV-VUV excitation spectra were recorded using synchrotron radiation. Excitation spectra proved that atmosphere of preparation significantly influences the host-to-activator energy transfer, which is the most efficient for materials made in reducing conditions. Also radioluminescence efficacy was found to be superior for materials prepared in such conditions. |
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