Thermoluminescence and defect study of MgSiO3 ceramics

Enstatite (MgSiO 3 ) 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 measurem...

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Bibliographic Details
Published in:Philosophical magazine (Abingdon, England) England), 2010-04, Vol.90 (12), p.1567-1574
Main Authors: Nagabhushana, H., Nagabhushana, B.M., Umesh, B., Premkumar, H.B., Anil, Nalina, Gundu Rao, T.K., Chakradhar, R.P.S.
Format: Article
Language:English
Subjects:
Ceramics
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Defects
enstatite
ESR
Exact sciences and technology
gamma irradiation
luminescence
Materials science
Materials synthesis
materials processing
Physical radiation effects, radiation damage
Physics
Structure of solids and liquids
crystallography
Thermoluminescence
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Summary:Enstatite (MgSiO 3 ) 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.
ISSN:1478-6435
1478-6443
DOI:10.1080/14786430903413367