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Synthesis and properties of submicron range CaSO4:Eu particles |
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| Authors: | RR Patil SM Dhopte SV Moharil |
| Institution: | a Department of Physics, Institute of Science Civil Lines, Nagpur 440001, India b National Environmental Engineering Research Institute, Nehru Marg, Nagpur 440015, India c Department of Physics, Nagpur University, Nagpur 440010, India |
| Abstract: | CaSO4:Eu with particle size in submicron range was synthesized. Radiation induced Eu3+↔Eu2+ conversion as well as thermal conversion was studied. The samples showed thermal conversion above 400 °C. However, no radiation induced conversion in submicron range particles was observed. Particles heated above 400 °C coalesce and when heated at 925 °C bigger particles of 20 μm size were formed. Optical microscopy of these particles reveals red inclusion of about 5 μm inside CaSO4 particle. It is speculated that the red inclusion is CaS:Eu2+. |
| Keywords: | Photoluminescence Eu3+ Eu2+ Redox reactions CaSO4 Wet chemical preparation |
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