Thermoluminescence and defect study of MgSiO3 ceramics |
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| Authors: | H Nagabhushana BM Nagabhushana B Umesh HB Premkumar Nalina Anil TK Gundu Rao |
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| Institution: | 1. Department of PG Studies in Physics , Govt. Science College , Tumkur-572 103 , India;2. Department of Chemistry , M.S. Ramaiah Institute of Technology , Bangalore-560 054 , India;3. Department of Humanities , PVP Polytechnic , Bangalore-560 056 , India;4. Department of Physics , UG Studies, Jain University , Bangalore-560 027 , India;5. R.S.I.C., Indian Institute of Technology , Powai , Mumbai-400 076 , India |
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| Abstract: | Enstatite (MgSiO3) ceramic powders were synthesised by a low-temperature initiated self-propagating, gas-producing solution combustion process. The prepared powders were characterised by powder X-ray diffraction, scanning electron microscopy and Brunauer–Emmer–Teller specific surface area measurements. Defect centres induced by radiation were studied using the techniques of thermoluminescence (TL) and electron spin resonance (ESR). A well-resolved glow with peak at 178°C and a shouldered peak at 120°C were observed. Two defect centres were identified by ESR measurements, which were carried out at room temperature, and these were assigned to an O? ion and F+ centre. The O? ion (hole centre) appears to correlate with the main TL peak at 178°C. |
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| Keywords: | ceramics luminescence enstatite gamma irradiation ESR |
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